Oil/Air Cooler Units - Hydra · PDF fileOil/Air Cooler Units Standard series EL Type COMPLETE OIL / AIR COOLER SYSTEM WITH AXIAL FAN FOR INDUSTRIAL APPLICATIONS. Application These

Oil/Air Cooler UnitsStandard seriesEL Type

COMPLETE OIL / AIRCOOLER SYSTEMWITH AXIAL FAN FORINDUSTRIAL APPLICATIONS.

ApplicationThese high performance coolers withaxial fans are suitable for hydrauliccooling applications with both return lineand off line versions available.Typical applications include: industrialpower units, lubrication systems(i.e. gearboxes) and machine tools.

OK-EL Product FeaturesLarge Range Of Sizes16 Bar Dynamic Pressure RatingModular ConstructionEL coolers use high efficiency axial fansand strong cooling elements to achievemaximum performance. Many modelsare available with medium or high speedfans and the modular design allows theaddition of circulation pumps and filterswhen required.

OKA & OKAFProduct FeaturesOff-line Complete Package.Avoids return line pressure & flowproblems. Allows integration of qualityHydac filtration.The OKA version with integrated oilcirculation pump allows the cooler tocreate an off-line cooling system thatcan also provide high quality filtration ifrequired with the OKAF model havingthe latest high performance Hydac filteralso integrated.The advantages of the off line coolingsystem include stable cooling (andfiltration) performance irrespective ofvariations in flow and duty for the mainhydraulic circuit. This allows the coolerto be sized to suit the heat load and notthe maximum return line flow of the maincircuit. A further advantage is that theoff-line cooler is completely isolatedfrom surge pressures in the return linethat can potentially damage the cooler.

Cooling range 2-108 kW at ΔT 40 °CCompact, efficient and powerfulStandard motor flange B5/B14Simple disassembly of components

Test procedure certified following EN 1048 E 5.

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OIL/AIR COOLERDESCRIPTIONGENERALIn hydraulic systems energy istransformed and transmitted. During thistransformation and transmission lossesoccur, i.e. mechanical and hydraulicenergy is converted into heat. It is thefunction of the cooler to dissipate thisheat.ADVANTAGES OF THE OIL/AIRCOOLERS:

Environmentally friendly:exchange between air and oil notpossibleFor commissioning only electricalenergy is requiredLow operating costs, no additionalcooling circuit necessary for thecooling medium, i.e. air

CONSTRUCTION FOR OK EL1-11Oil/air cooler units consist of the (1)metal housing, (2) motor, (3) axial fanand (4) heat exchanger. The oilconnections are external.

Example

OK-EL1

OK-EL2-3

OK-EL4,5,6,9,10,11

OK-EL1

OK-EL2-3

OK-EL4-11OK-EL7,8

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CONSTRUCTION FOROKA & OKAF EL4-6

OKA-EL4,5,6Oil/air cooler units consists of the metalhousing (1), motor (2), axial fan (3) andheat exchanger (4), and low noise feedpump (5) with excellent suctionperformance. The oil connections areexternal.

OKAF-EL4,5,6Oil/air cooler units consist of the metalhousing (1), motor (2), axial fan (3), heatexchanger (4), low noise feed pump (5)with excellent suction performance andfilter (6). The oil connections areexternal, together with access to thefilter element for cleaning and changing.The filters are fitted with visual cloggingindicators, as standard.

OKA-EL4,5,6

OKAF-EL4,5,6

OKA-EL4,5,6

OKAF-EL4,5,6

Example

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CONSTRUCTION FOROKA & OKAF EL7-11

OKA-EL7-11Oil/air cooler units consist of the metalhousing (1), motor (2), axial fan (3), heatexchanger (4), and low noise feed pump(5) with excellent suction performance.The oil connections are external.

OKAF-EL7-11Oil/air cooler units consist of the metalhousing (1), motor (2), axial fan (3), heatexchanger (4), and low noise feed pump(5) with excellent suction performanceand filter (6). The oil connections areexternal, together with access to thefilter element for cleaning and changing.The filters are fitted with visual cloggingindicators, as standard.

Example

OKA-EL7-11

OKAF-EL7-11

OKA-EL7-11

OKAF-EL7-11

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OK-EL1H – *120 ** 0.04 60 16 130 2000 – 7OK-EL2S – *180 4/63 0.18 64 16 130 2000 – 13OK-EL2H – *180 2/63 0.25 80 16 130 2000 – 13OK-EL3S – *180 4/63 0.18 66 16 130 2000 – 17OK-EL3H – *180 2/71 0.55 85 16 130 2000 – 17OK-EL4L – *200 6/71 0.25 63 16 130 2000 – 31OK-EL4S – *200 4/71 0.37 72 16 130 2000 – 31OKA-EL4L 28-40 24/34 6/90 1.1 68 6 80 350 – 34OKA-EL4S 28-40 36/52 4/90 1.8 75 6 80 350 – 34OKAF-EL4L 28-40 24/34 6/90 1.1 68 6 80 350 LPF 160 41OKAF-EL4S 28-40 36/52 4/90 1.8 75 6 80 350 LPF 160 41OK-EL5L – *250 6/80 0.37 65 16 130 2000 – 38OK-EL5S – *250 4/90 1.1 75 16 130 2000 – 38OKA-EL5L 28-40 24/34 6/90 1.1 70 6 80 350 – 41OKA-EL5S 28-40 36/52 4/90 1.8 80 6 80 350 – 41OKAF-EL5L 28-40 24/34 6/90 1.1 70 6 80 350 LPF 160 48OKAF-EL5S 28-40 36/52 4/90 1.8 80 6 80 350 LPF 160 48OK-EL6L – *250 6/80 0.37 67 16 130 2000 – 43OK-EL6S – *250 4/90 1.1 77 16 130 2000 – 47OKA-EL6L 28-40 24/34 6/90 1.1 70 6 80 350 – 50OKA-EL6S 28-40 36/52 4/90 1.8 81 6 80 350 – 50OKAF-EL6L 28-40 24/34 6/90 1.1 70 6 80 350 LPF 160 57OKAF-EL6S 28-40 36/52 4/90 1.8 81 6 80 350 LPF 160 57

1. TECHNICAL DETAILS1.1. TABLE OF TECHNICAL SPECIFICATIONS FOR SIZES 1 TO 6

Type

of c

oole

r

Max

. ope

ratin

g pr

essu

re [b

ar]

Oil

flow

[l/m

in]

Dis

plac

emen

t [cm

³/U]

N°

of p

oles

[-] /

siz

e[-]

Mot

or c

apac

ity [k

W] a

t 50

Hz

Siz

e of

filte

r [-]

Noi

se le

vel (

1m d

ista

nce)

[dB

(A)]

at 5

0 H

z

Max

. oil

tem

pera

ture

[°C

]

Max

. vis

cosi

ty [m

m2 /s

]

Wei

ght [

kg]

– Suction vacuum at pump inlet max -0.4 bar.– For direction of fan rotation, see arrow on cooler housing.– Electric vent drive: axial drive with forward flow through cooler element (sucking).– Cooling fluid: mineral oil to DIN 51524; for other fluids,

please contact our sales/technical department.– Three-phase motors IP55, conforming to CE norm.– The noise levels are only a guide as acoustic properties vary and depend

on the characteristics of the room, connections, viscosity and resonance.

COOLERSELECTION

Designation:PV = Power loss [kW]P01 = Specific cooling capacity [kW/°C]V = Tank contents [l]ρoil = Density of the oil [kg/l]

for mineral oil: 0.915 kg/lCoil = Specific heat capacity [kJ/kg°C]

for mineral oil 1.88 kJ/kg°CΔT = Temperature increase in the

system [°C]t = Operating time [min]T1 = Desired oil temperature [°C]T3 = Ambient temperature [°C]

Example 1:Measurement of the power losson existing units and machinery.For this method the temperatureincrease of the oil is measuredover a certain period. The powerloss can be calculated from thetemperature increase.Parameters:The oil temperature increasesfrom 20 °C to 45 °C over15 minutes.The tank contains 100 l.Heat to be dissipated:

Cooler selection:– Desired oil temperature: 60 °C– Ambient temperature (air): 30 °C

A 10% safety margin isrecommended to allow forelement contamination, andtherefore the specific power is:P01 × 1.1 = 0.175 kW/°CThe power loss 0.175 kW/°C mustbe dissipated by an oil cooler.Suggestion:–Cooler OK-EL2H,

P01 = 0.18 kW/°C at 80 l/min.Example 2:The power loss can also beestimated: With unrestricted flowapprox. 15 to 20% of the drivepower. With restricted flow up to30% of the drive power.

* :max oil flow**:electrical fans IP20

Pv =ΔT × coil × ρoil × V

[kW]

t × 60

Pv =25 × 1.88 × 0.915 × 100

= 4.78 [kW]

t × 60

P01 = Pv [kW/°C]T1 - T3

P01 = 4.78

= 0.159 [kW/°C]60 - 30

Warning!When operating a cooler in situations where the difference in temperature betweenambient air and inlet oil exceed 50 Deg. Celsius, care must be taken to avoid cyclingof the fan at full speed/air flow as this can cause rapid change in materialtemperature of element and may result in significant reduction in lifetime or directdamage to the element through thermal stress.Please contact your Hydac Branch or distributor for speed control solutions.

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1.2. TABLE OF TECHNICAL SPECIFICATIONS FOR SIZES 7 TO 11COOLERSELECTION


for mineral oil: 0.915 kg/lCoil = Specific heat capacity [kJ/kg°C]

for mineral oil 1.88 kJ/kg°CΔT = Temperature increase in the



Cooler selection:– Desired oil temperature: 60 °C– Ambient temperature (air): 30 °C

A 10% safety margin isrecommended to allow forelement contamination, andtherefore the specific power is:P01 × 1.1 = 1.06 kW/°C.The power loss 1.06 kW/°C mustbe dissipated by an oil cooler.Suggestion:–Cooler OK-EL8S,

P01 = 1.08 kW/°C at 90 l/min.Example 2:The power loss can also beestimated: With unrestricted flowapprox. 15 to 20% of the drivepower. With restricted flow up to30% of the drive power.

PV = ΔT × coil × ρoil × V

[kW] t × 60

PV = 40 × 1.88 × 0.915 × 400

= 28.7 [kW] 16 × 60

Type

of c

oole

r

Dis

plac

emen

t [cm

3 /U]

Oil

flow

[l/m

in] a

tm

ax. o

pera

ting

pres

sure

N°

of p

oles

[-] /

siz

e [-]

for t

he fa

n m

otor

Mot

or c

apac

ity [k

W] a

t 50

Hz

for t

he p

ump

mot

orN

oise

leve

l [dB

(A)]

(at 1

m d

ista

nce)

at 5

0 H

zM

ax. o

pera

ting

pres

sure

[bar

]

Max

. oil

tem

pera

ture

[°C

]

Max

. Vis

cosi

ty [m

m2 /s

]co

ntin

uous

wor

king

Siz

e of

filte

r [-]

Wei

ght [

kg]

OK-EL7L - *300 6/90 1.1 76 16 130 2000 - 54OK-EL7S - *300 4/100 3.0 84 16 130 2000 - 59OKA-EL7L 40/58 100/150 2/90 3.0 320/130

69 180 6/90 2/112 1.1 5.5 76 6 80 240 - 74OKA-EL7S 40/58 100/150 2/90 3.0 320/130

69 180 4/100 2/112 3.0 5.5 84 6 80 240 - 79OKAF-EL7L 40/58 100/150 2/90 3.0 320/130

69 180 6/90 2/112 1.1 5.5 76 6 80 240 LPF 280 82OKAF-EL7S 40/58 100/150 2/90 3.0 320/130

69 180 4/100 2/112 3.0 5.5 84 6 80 240 LPF 280 87OK-EL8L - *300 6/90 1.1 77 16 130 2000 - 58OK-EL8S - *300 4/100 3.0 84 16 130 2000 - 63OKA-EL8L 40/58 100/150 2/90 3.0 320/130

69 180 6/90 2/112 1.1 5.5 77 6 80 240 - 78OKA-EL8S 40/58 100/150 2/90 3.0 320/130

69 180 4/100 2/112 3.0 5.5 84 6 80 240 - 83OKAF-EL8L 40/58 100/150 2/90 3.0 320/130

69 180 6/90 2/112 1.1 5.5 77 6 80 240 LPF 280 86OKAF-EL8S 40/58 100/150 2/90 3.0 320/130

69 180 4/100 2/112 3.0 5.5 84 6 80 240 LPF 280 91OK-EL9LL - *330 8/90 0.55 70 16 130 2000 - 109OK-EL9L - *330 6/90 1.1 77 16 130 2000 - 109OKA-EL9LL 40/58 100/150 2/90 3.0 320/130

69 180 8/90 2/112 0.55 5.5 70 6 80 240 - 133OKA-EL9L 40/58 100/150 2/90 3.0 320/130

69 180 6/90 2/112 1.1 5.5 77 6 80 240 - 133OKAF-EL9LL 40/58 100/150 2/90 3.0 320/130

69 180 8/90 2/112 0.55 5.5 70 6 80 240 LPF 280 141OKAF-EL9L 40/58 100/150 2/90 3.0 320/130


69 180 8/100 2/112 1.1 5.5 72 6 80 240 - 167OKA-EL10L 40/58 100/150 2/90 3.0 320/130

69 180 6/112 2/112 2.2 5.5 80 6 80 240 - 167OKAF-EL10LL 40/58 100/150 2/90 3.0 320/130

69 180 8/100 2/112 1.1 5.5 72 6 80 240 LPF 280 175OKAF-EL10L 40/58 100/150 2/90 3.0 320/130


69 180 8/132 2/112 2.2 5.5 77 6 80 240 - 216OKA-EL11L 40/58 100/150 2/90 3.0 320/130

69 180 6/132 2/112 3.0 5.5 85 6 80 240 - 216OKAF-EL11LL 40/58 100/150 2/90 3.0 320/130

69 180 8/132 2/112 2.2 5.5 77 6 80 240 LPF 280 224OKAF-EL11L 40/58 100/150 2/90 3.0 320/130

69 180 6/132 2/112 3.0 5.5 85 6 80 240 LPF 280 224* max oil flow

P01 = Pv [kW/°C]T1 - T3

P01 = 28.7

= 0.96 [kW/°C]60 - 30

See notes below the table at page 5.

N°

of p

oles

[-] /

siz

e [-]

for t

he p

ump

mot

or

Mot

or c

apac

ity [k

W] a

t 50

Hz

for t

he fa

n m

otor

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10

20

30

40

50

60

70

80

90

100

110

120

0 30 60 90 120 150 180 210 240 270 300 330 360 390 420

0

0.25

0.5

0.75

1

1.25

1.5

1.75

2

2.25

2.5

2.75

3

EL8L

EL9L

EL7L

EL7S

EL8S

EL9LL

EL10LL

EL11LL

EL11L

EL10L

0

2

4

6

8

10

12

14

16

18

20

22

24

26

28

30

0 20 40 60 80 100 120 140 160 180 200 220 240 260

0

0.05

0.1

0.15

0.2

0.25

0.3

0.35

0.4

0.45

0.5

0.55

0.6

0.65

0.7

0.75

EL1H

EL4L

EL3S

EL2H

EL5L

EL6L

EL4S

EL6S

EL5S

EL2S

EL3H

1.3. HYDRAULIC DETAILS1.3.1 Cooling capacity:

depending on oil flow and the temperature differential ΔT between the oil inlet and air inletFor calculations with low ΔT values (i.e. below 10 °C), please contact our technical support staff.

OK EL1-6Tolerance: ± 5%

Hea

t dis

sipa

tion

at Δ

T =

40 °

C [k

W]

Spec

ific

heat

dis

sipa

tion

[kW

/°C

] *

Oil flow [l/min]

OK EL7-11Tolerance: ± 5%

Hea

t dis

sipa

tion

at Δ

T =

40 °

C [k

W]

Spec

ific

heat

dis

sipa

tion

[kW

/°C

] *

Oil flow [l/min]

* Values measured at ΔT = 40 °C, may vary at lower ΔT values

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0

0.2

0.4

0.6

0.8

1

1.2

1.4

1.6

1.8

2

0 30 60 90 120 150 180 210 240 270 300 330 360 390 420

EL7

EL10

EL8

EL9

EL11

0.0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

0 30 60 90 120 150 180 210 240 270 300

EL6

EL4

EL1

EL5

EL2

EL3

1.3.2 Pressure differential ΔΔΔΔΔp:measured at 30 mm²/s using mineral oil

Pressure drop curves OK EL1-6Tolerance: ± 5%

Oil flow [l/min]

Pressure drop curves OK EL7-11Tolerance: ± 5%

Oil flow [l/min]

For other viscosities the result must be multiplied by K

Viscosity (mm²/s) 10 15 22 30 46 68 100 150Factor K 0.35 0.5 0.75 1 1.4 1.9 2.5 3.5

Pre

ssur

e dr

op a

t 30

mm

²/s [b

ar]

Pre

ssur

e dr

op a

t 30

mm

²/s [b

ar]

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2. MODEL TYPE(also order example) OKAF-EL4S / 40 / 3 . 0 / B / M / A / LPF160 / 4 / 1 / IBT

Type of coolerOK-EL = Oil/air coolerOKA-EL = Oil/air cooler with built-in feed pumpOKAF-EL = Oil/air cooler with built-in feed pump and filter

Size / motor speed1-11 = See hydraulic details 1.3.LL = 8 pl (750 min-1)L = 6 pl (1000 min-1)S = 4 pl (1500 min-1)H = 2 pl (3000 min-1)

Displacement cm³/rev28, 40 = (OKA/OKAF-EL4 -> EL6, see technical details 1.1.)40, 58, 69 = (OKA/OKAF-EL8 -> EL11, see technical details 1.2.)

Type code and modification numberFor the latest version of each cooler, please see the table in our internet site.

Clogging indicators (only OKAF)A = Without clogging indicatorB = With visual indicator (*)C = With electrical indicatorD = With electrical and optical indicator

FluidsM = Mineral oil to DIN 51524

Other fluids on request

Motor voltageA = Standard voltages and frequencies for three–phase motor

50 Hz: 380 - 420 V (Y) / 220-240 V (Δ)60 Hz: 440 - 480 V (Y) / 254-277 V (Δ)Except for EL1, for which the standard voltage is 220-240 V, 50/60Hz, single phaseOther special voltages and frequencies on request and clearly written

Size of filter (only OKAF)OKAF-EL4-6 = LPF160OKAF-EL7-11 = LPF280

Filtration rating in micron, Viscosity up to 80 mm²/s (only OKAF)8 = 5 μm Betamicron®-3-N (5 BN3HC)4 = 10 μm Betamicron®-3-N (10 BN3HC) *5 = 20 μm Betamicron®-3-N (20 BN3HC)

Paint1 = RAL 5009 (Standard)

Other paint on request and clearly written

AccessoriesAITF = Thermostat (fixed)IBP = Heat exchanger with integrated bypass valveIBT = Heat exchanger with integrated thermo-bypass valveGP = Vibration absorber

* standard for OKAF unless otherwise specified.

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3. DIMENSIONS3.1. OK-EL1

A1 B C1 D1 D2 D3 E1 E2 E3 F W1 W2 Z1 Z3±10 ±25 ±10 ±2 ±2 ±2 ±5 ±5 ±5 Ø/slot Min.* Min.*

OK–EL1 H 355 – 200 255 150 295 289 41 88 9 150 100 G¾" –OK–EL2 S,H 355 400 330 255 160 295 289 41 58 9 500 200 G¾" –OK–EL3 S,H 455 420 380 255 290 295 389 41 58 9 800 300 G¾" –OK–EL4 L,S 520 527 485 410 425 450 439 51 104 9 1200 400 G1" –OK–EL5 L,S 562 580 542 410 482 450 439 72 94 9 1500 500 G1" –OK–EL6 L,S 640 600 584 410 482 450 500 80 74 9 1800 600 G1 ¼" M22x1.5OK–EL7 L,S 726 612 706 410 560 450 600 73 74 9x20 1200 600 G1 ¼" M22x1.5OK–EL8 L,S 726 612 706 410 560 450 630 58 74 9x20 1200 600 G1 ¼" M22x1.5OK–EL9 L 880 709 790 750 700 790 760 75 116 12 2500 900 G1 ½" M22x1.5OK–EL10 L 1030 758 930 750 700 790 910 75 116 12 2800 900 G1 ½" M22x1.5OK–EL11 L 1180 804 1050 750 700 790 1060 75 116 12 3000 1000 G1 ½" M22x1.5* for smaller distances please contact our technical office

3.2. OK-EL2-6

3.4. OK-EL9-11

Plug

Plug

Plug

3.3. OK-EL7-8

Plug

(4x) slot F

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3.5. OKA/OKAF-EL4-6

A1 B C1 C2 D1 D2 D3 E1 E2 E3 F W1 W2 Z1 Z2(3x) Z3±10 ±25 ±10 ±25 ±2 ±2 ±2 ±5 ±5 ±5 Ø/slot Min.* Min.* (IN)

OKA–EL4 L,S 520 690 485 578 410 425 450 439 51 104 9 1200 400 G1 ¼" G 1" –OKA–EL5 L,S 562 700 542 653 410 482 450 439 72 94 9 1500 500 G1 ¼" G 1" –OKA–EL6 L,S 640 720 584 709 410 482 450 500 80 74 9 1800 600 G1 ¼" G1 ¼" M22x1.5OKAF–EL4 L,S 520 690 485 631 410 425 450 439 51 104 9 1200 400 G1 ¼" G 1" –OKAF–EL5 L,S 562 700 542 688 410 482 450 439 72 94 9 1500 500 G1 ¼" G 1" –OKAF–EL6 L,S 640 720 584 725 410 482 450 500 80 74 9 1800 600 G1 ¼" G1 ¼" M22x1.5OKA–EL7 L,S 736 612 706 775 560 560 600 600 83 74 9x20 1200 600 G 2" G1 ¼" M22x1.5OKA–EL8 L,S 736 612 706 815 560 560 600 630 68 74 9x20 1200 600 G 2" G1 ¼" M22x1.5OKA–EL9 L 880 709 790 910 830 700 870 760 75 116 12 2500 900 G 2" G1 ½" M22x1.5OKA–EL10 L 1030 758 930 1050 830 700 870 910 75 116 12 2800 900 G 2" G1 ½" M22x1.5OKA–EL11 L 1180 804 1050 1150 830 700 870 1060 75 116 12 3000 1000 G 2" G1 ½" M22x1.5OKAF–EL7 L,S 736 612 706 825 560 560 600 600 83 74 9x20 1200 600 G 2" G1 ¼" M22x1.5OKAF–EL8 L,S 736 612 706 846 560 560 600 630 68 74 9x20 1200 600 G 2" G1 ¼" M22x1.5OKAF–EL9 L 880 709 790 936 830 700 870 760 75 116 12 2500 900 G 2" G1 ½" M22x1.5OKAF–EL10 L 1030 758 930 1071 830 700 870 910 75 116 12 2800 900 G 2" G1 ½" M22x1.5OKAF–EL11 L 1180 804 1050 1191 830 700 870 1060 75 116 12 3000 1000 G 2" G1 ½" M22x1.5* for smaller distances please contact our technical office

3.7. OKA/OKAF-EL9-11

5. NOTEThe information in this brochure relates to the operatingconditions and applications described.For applications or operating conditions not described,please contact the relevant technical department.Subject to technical modifications.

Plug

3.6. OKAF-EL7-8

Plug(4x)slot F

4. CERTIFICATION FOLLOWING EN 1048Hydac SA design and manufacture high quality coolersthat are tested and certified to give reliable andrepeatable high performance. To ensure theperformance is accurate, testing in compliance with arecognized international test standard is the bestsolution. For air/liquid coolers this is EN1048.Hydac SA test procedure complies withthe requirements of EN 1048 and boththe procedure and test equipment areindependently inspected and certifiedby TÜV SÜDDEUTSCHLAND.The cooler performance details inthis brochure have been tested following EN 1048.

(4x)slot F

Oil/Air Cooler UnitsCompact application with AC MotorOK-ELC Type

ApplicationThese coolers are designed specificallyfor hydraulic applications where highperformance and efficiency are requiredand physical size is minimised to alloweasy installation. Typical applicationsinclude: industrial power units, lubricationsystems (i.e. gearboxes) and machinetools.

OK-ELC Product FeaturesThese coolers use a combination of highperformance cooling elements and highcapacity, compact AC electricallypowered fans to give long trouble-freeoperation in arduous hydraulicapplications.The compact design allows the coolersto fit most equipment and provide thehighest cooling performance in heatdissipation whilst minimising the spacerequired.

Cooling range 1-28 kWAC motors in 230/400 Volt 50/60 HzHydraulic pressure 16 bar dynamic

COMPACT OIL / AIR COOLERSNEW COMPACT DESIGN WITHAC ELECTRIC FANS AND HIGHCOOLING PERFORMANCE

Test procedure certified following EN 1048 E 5.

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OIL/AIR COOLERDESCRIPTIONGENERALIn hydraulic systems energy istransformed and transmitted. During thistransformation and transmission lossesoccur, i.e. mechanical and hydraulicenergy is converted into heat. It is thefunction of the cooler to dissipate thisheat.

ADVANTAGES OF THE OIL/AIRCOOLERS:

Environmentally friendly.No exchange between water and oilpossibleFor commissioning only electricalenergy is requiredLow operating costs, no additionalcooling circuit necessary for thecooling medium, i.e. air

CONSTRUCTIONOil/air cooler units consists of the (1)heat exchanger, (2) housing (3) axialmotor fan.The oil connections are on the rear side.

ELC 0

ELC 1

ELC 0

ELC 1

ELC 2-5

ELC 6-7

ELC 2-5

ELC 6-7

2 PASS

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1. TECHNICAL DETAILS1.1. TABLE OF TECHNICAL SPECIFICATIONS

– ELC0: the electrical connection wires are provided– ELC1-7: the electrical connection box is included– Capacitor is supplied with the cooler and mounted in the connection box

when required– All motors with IP55 have protection class F, except ELC0 with IP20– Mounting position: all positions possible– For direction of rotation see arrow on cooler housing– Cooling fluid

Mineral oil to DIN 51524For other fluids, please contact our sales/technical department

– The noise levels are only a guide as acoustic properties vary and dependon the characteristics of the room, connections, viscosity and resonance.

– Options: see accessory catalogue

COOLERSELECTION


for mineral oil: 0.915 kg/lCoil = Specific heat capacity [kJ/kgk]

for mineral oil 1.88 kJ/kgkΔT = Temperature increase in the



Cooler selection:– Desired oil temperature: 60 °C– Ambient temperature air: 30 °C

A 10% safety margin isrecommended to allow forelement contamination, andtherefore the specific power is:P01 × 1.1 = 0.175 kW/°C.The power loss 0.175 kW/°C mustbe dissipated by an oil cooler.Suggestion:–Cooler OK-ELC3H,

P01 = 0.2 kW/°C at 40 l/minExample 2:The power loss can also beestimated. With unrestricted flowapprox. 15 to 20% of the drivepower. With restricted flow up to30% of the drive power.


[kW] t × 60

PV = 25 × 1.88 × 0.915 × 100

= 4.78 [kW] 15 × 60

P01 = PV [kW/°C] T1 - T3

P01 = 4.78

= 0.159 [kW/°C] 60 - 30


ELC0H 230 20 2 35 2800 – 20 59 16 130 2000 3.2ELC1H 230 120 2 120 2700 2/450 55 71 16 130 2000 9ELC1H 400 120 2 115 2600 2/500 55 71 16 130 2000 9ELC2H 230 210 2 120 2600 2/450 55 71 16 130 2000 11.9ELC2H 400 210 2 140 2500 2/500 55 71 16 130 2000 11.9ELC3H 230 220 2 170 2600 4/450 55 75 16 130 2000 14.7ELC3H 400 220 2 188 2500 3/500 55 75 16 130 2000 14.7ELC4S 230 190 4 210 1400 4/450 55 69 16 130 2000 21ELC4S 400 190 4 230 1380 – 55 69 16 130 2000 21ELC5S 230 270 4 210 1400 4/450 55 72 16 130 2000 28ELC5S 400 270 4 230 1380 – 55 72 16 130 2000 28ELC6H 230 180 2 2X 170 2600 2X 4/450 55 75 16 130 2000 39ELC6H 400 180 2 2X 188 2500 2X 3/500 55 75 16 130 2000 39ELC7S 230 140 4 2X 210 1400 2X 4/450 55 71 16 130 2000 45ELC7S 400 140 4 2X 230 1380 – 55 71 16 130 2000 45

Oil

flow

at 1

.5 b

ar p

ress

ure

drop

[l/m

in]

Volta

ge [V

]

Type

of c

oole

r

N°

of p

oles

Mot

or C

apac

ity a

t 50H

z [W

]

Spee

d a

t 50

Hz

[rpm

]

Cap

acito

r [µ

F/V

DB

]

Pro

tect

ion

clas

s IP

[-]

Noi

se le

vel [

dB(A

)] (a

t 1m

dis

tanc

e)

Max

. ope

ratin

g p

ress

ure

[bar

]

Max

. oil

tem

pera

ture

[°C

]

Max

. Vis

cosi

ty [m

m²/s

]

Wei

ght [

kg]

4

E 5.

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.05

0.0

0.2

0.4

0.6

0.8

1.0

1.2

1.4

1.6

1.8

2.0

2.2

2.4

0 50 100 150 200 250

ELC 4

ELC 2

ELC 1

ELC 7

ELC 3

ELC 6ELC 0

ELC 5

0

5

10

15

20

25

30

0 50 100 150 200 2500

0.1

0.2

0.3

0.4

0.5

0.6

0.7ELC 7S

ELC 5S

ELC 4S

ELC 3H

ELC 2H

ELC 6H

ELC 1H

ELC 0H

1.2. HYDRAULIC DETAILS1.2.1 Cooling capacity

depending on oil flow and the temperature differential ΔT between the oil inlet and air inlet.For calculations with low ΔT values (i.e. below 10 °C), please contact our technical support staff.

Tolerance: ± 5%

Hea

t dis

sipa

tion

at Δ

T =

40 °

C [k

W]

Spec

ific

heat

dis

sipa

tion

[kW

/°C

] *

Oil flow [l/min]

Tolerance: ± 5%

Pre

ssur

e dr

op a

t 30

mm

²/s [b

ar]

Oil flow [l/min]


1.2.2 Pressure differential ΔΔΔΔΔp measured at 30 mm²/s using mineral oil

Viscosity (mm2/s) 10 15 22 30 46 68 100 150Factor K 0.35 0.5 0.75 1 1.4 1.9 2.5 3.5


5

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2. MODEL TYPE(also order example) OK-ELC2H / 1.0 / 230V / 1 / S / AITF50

Type of coolerOK-ELC = Oil/air cooler

Size / motor speed0:7 = See hydraulic details 1.2H = 3000 min-1

S = 1500 min-1

Type code and modification number

Electrical motor fan voltage230V = 230 Volts 50/60 Hz400V = 400 Volts 50/60 Hz

Paint1 = RAL 9005 (Standard)Other paint on request and clearly written

Air flow directionS = Suction (Standard)

Accessories (for more information see accessories brochure )AITF50 = Thermostat (fixed)IBP = Heat exchanger with integrated bypass valve (not available for ELC0 and ELC1)IBT = Heat exchanger with integrated thermo-bypass valve (not available for ELC0 and ELC1)GP = Vibration absorber

6

E 5.

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3. DIMENSIONS

3.1. ELC0

A1 B C1 C2 D1 D2 D3 E1 E2 W1 W2 Z1 F±5 ±10 ±4 ±4 ±1 ±2 ±2 ±2 ±5 min min 4xØ

ELC0 202 138 240 220 60 190 80 72 79 150 50 G1/2" 6.5

3.2. ELC1

A1 B C1 D1 D2 D3 D4 E1 E2 E3 W1 W2 Z1 F Plug±5 ±10 ±8 ±2 ±2 ±2 ±2 ±5 ±5 ±5 min min 6xØ

ELC1 300 205 340 110 270 136 50 200 65 300 200 70 G3/4" 8.5 M22X1.5

PLU

G

7

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3.3. ELC2-5

A1 B C1 D1 D2 D3 E1 E2 E3 E4 E5 W1 W2 Z1 F Plug±5 ±10 ±8 ±3 ±3 ±3 ±5 ±5 ±5 ±2 ±2 min min 8xØ

ELC6 495 286 810 255 482 295 321 91 750 450 170 400 200 G1 ¼" 16x9 M22X1.5

ELC7 547 289 950 255 482 295 373 94 890 503 200 503 250 G1 ¼" 18x9 M22X1.5

A1 B C1 D1 D2 D3 E1 E2 E3 E4 E5 W1 W2 Z1 F Plug±5 ±10 ±5 ±2 ±3 ±3 ±5 ±5 ±5 ±2 ±2 min min 6xØ

ELC2 328 295 384 255 160 295 199 72 324 288 80 250 150 G1" 14x10 M22X1.5

ELC3 371 287 420 255 240 295 230 78 370 329 100 300 180 G1" 16x9 M22X1.5

ELC4 465 292 500 255 255 295 289 96 450 421 150 400 200 G1" 16x9 M22X1.5

ELC5 475 306 602 255 255 295 350 70 490 200* 580* 400 250 G1 1/4" 12 M22X1.5

* : ELC5 has the front fixing holes in the lateral sides.

3.4. ELC6-7

PLU

G

PLUG

5. NOTEThe information in this brochurerelates to the operating conditionsand applications described.For applications or operatingconditions not described, pleasecontact the relevant technicaldepartment.Subject to technical modifications.

4. CERTIFICATION FOLLOWING EN 1048Hydac SA design and manufacture high quality coolers that are tested andcertified to give reliable and repeatable high performance. To ensure theperformance is accurate, testing in compliance with a recognized internationaltest standard is the best solution. For air/liquid coolers this is EN1048.Hydac SA test procedure complies with the requirementsof EN 1048 and both the procedure and test equipmentare independently inspected and certified byTÜV SÜDDEUTSCHLAND.The cooler performance details inthis brochure have been tested following EN 1048.

Oil/Air Cooler UnitsSilent seriesSC Type

ApplicationThese low noise coolers with theirunique vertical air flow for discharge airare suitable for all small and mediumsize hydraulic cooling applications withboth return line and off-line versionsavailable. Typical applications include:lifts, lubrication systems (i.e. gearboxes)and machine tools.

The SCA version with integrated oilcirculation pump allows the cooler tocreate an off-line cooling system thatcan also provide high quality filtration ifrequired with the SCAF model havingthe latest high performance filter alsointegrated.

Product featuresThe advantages of the off line coolingsystem include stable cooling (andfiltration) performance irrespective ofvariations in flow and duty for the mainhydraulic circuit. This allows the coolerto be sized to suit the heat load and notthe maximum return line flow of the maincircuit. A further advantage is that theoff-line cooler is completely isolated fromsurge pressures in the return line thatcan potentially damage the cooler.

Cooling range 2-20kW at ∆T 40 °CNoise level < 70dB(A) at 1m distancefor SC - L version (low speed) at 50 HzCompact, efficient and powerfulMotor flange B5, the most commonlyavailable typeSimple disassembly of pump andmotor

THE LOW NOISE OILCOOLER RANGE WITH HIGHCOOLING PERFORMANCE

Test procedure certified following EN 1048

2

OIL/AIR COOLERDESCRIPTION

GENERALIn hydraulic systems energy istransformed and transmitted. During thistransformation and transmission lossesoccur, i.e. mechanical and hydraulicenergy is converted into heat. It is thefunction of the cooler to dissipate thisheat.



CONSTRUCTIONOil/air cooler units consists of the (1)metal housing, (2) motor, (3) radial fan,(4) heat exchanger, (depending on thetype of unit) a (5) low noise feed pumpwith excellent suction performance and/or (6) filter. The oil connections areexternal together with access to the filterelement for cleaning and changing. Thefilters are fitted with visual cloggingindicators as standard.

For SC size 0, see page 6

SC 1-4L,S*

SCA 1-4L,S*

SCAF 1-4L,S*

SC 0-4

SCA 0-4

SCAF 0-4

3

1. TECHNICAL DETAILS1.1 TABLE OF TECHNICAL SPECIFICATIONS

Type

of c

oole

r

Dis

plac

emen

t [cm

3 /U

]

Oil

flow

[l/m

in]

N°

of p

oles

[-] /

siz

e [-

]

Mot

or c

apac

ity [k

W]

Noi

se le

vel [

dB(A

)]at

1m

dis

tanc

e at

50/

60H

z

Max

. ope

ratin

g pr

essu

re [b

ar]

Max

. oil

tem

pera

ture

[°C

]

Max

. Vis

cosi

ty [m

m2 /

s]

Siz

e of

filte

r [-

]

Wei

ght [

kg]

COOLERSELECTION

Designation:PV = Power loss [kW]P

01= Specific cooling capacity [kW/°C]

V = Tank contents [l]ρoil = Density of the oil [kg/l]

for mineral oil: 0.915 kg/lC

oil= Specific heat capacity [kJ/kgk]

for mineral oil 1.88 kJ/kgk∆T = Temperature increase in the

system [°C]t = Operating time [min]T1 = Recommended oil temperature [°C]T3 = Ambient temperature [°C]



A 10% safety margin isrecommended to allow forelement contamination, andtherefore the specific power is:P01 × 1.1 = 0.175 kW/°C.The power loss 0.175 kW/°C mustbe dissipated by an oil cooler.Suggestion:–Cooler SCA 2S/28/...,

P01 0.195 kW/K at 36 l/min.Example 2:The power loss can also beestimated: With unrestricted flowapprox. 15 to 20% of the drivepower. With restricted flow up to30% of the drive power.

PV = ∆T × coil × ρoil × V

[kW] t × 60

PV = 25 × 1.88 × 0.915 × 100

= 4.78 [kW] 15 × 60

P01 = PV [kW/°C]

T1 - T3

P01 = 4.78

= 0.159 [kW/°C] 60 - 30

SC 0S – * 60 4/71 0.18 61/64 16 130 2000 – 14SCA 0S 10 13 4/71 0.37 65/72 6 80 180 – 18SCAF 0S 10 13 4/71 0.37 65/72 6 80 180 LF60 23SC 1L – * 120 6/71 0.25 60/62 16 130 2000 – 21SC 1S – * 120 4/71 0.25 65/69 16 130 2000 – 21SCA 1L 10 8.5 6/71 0.25 60/63 6 80 180 – 25SCA 1S 10 13 4/71 0.37 66/70 6 80 180 – 25SCAF 1L 10 8.5 6/71 0.25 60/63 6 80 180 LPF160 31SCAF 1S 10 13 4/71 0.37 66/70 6 80 180 LPF160 31SC 2L – * 120 6/80 0.37 60/63 16 130 2000 – 32SC 2S – * 120 4/80 0.55 70/74 16 130 2000 – 32SCA 2L 28–40 24–34 6/90 1.10 65/69 6 80 180 – 38SCA 2S 28–40 36–52 4/90 1.50 72/75 6 80 180 – 38SCAF 2L 28–40 24–34 6/90 1.10 65/69 6 80 180 LPF160 45SCAF 2S 28–40 36–52 4/90 1.50 72/75 6 80 180 LPF160 45SC 3L – * 160 6/80 0.55 68/72 16 130 2000 – 47SC 3S – * 160 4/80 0.75 79/82 16 130 2000 – 47SCA 3L 28–40 24–34 6/90 1.10 69/74 6 80 180 – 59SCA 3S 28–40 36–52 4/90 1.80 80/84 **6 80 180 – 59SCAF 3L 28–40 24–34 6/90 1.10 69/74 6 80 180 LPF160 67SCAF 3S 28–40 36–52 4/90 1.80 80/84 **6 80 180 LPF160 67SC 4L – * 160 6/80 0.55 68/72 16 130 2000 – 49SC 4S – * 160 4/80 0.75 77/80 16 130 2000 – 49SCA 4L 28–40 24–34 6/90 1.10 68/73 6 80 180 – 61SCA 4S 28–40 36–52 4/90 1.80 79/83 **6 80 180 – 61SCAF 4L 28–40 24–34 6/90 1.10 68/73 6 80 180 LPF160 69SCAF 4S 28–40 36–52 4/90 1.80 79/83 **6 80 180 LPF160 69* max oil flow** at 60Hz max operating pressure admitted: 4 bar

– Suction vacuum at pump inlet max -0.4 bar– For direction of rotation see arrow on cooler housing– Mounting position: preferably horizontal– Cooling fluid: Mineral oil to DIN 51524

For other fluids, please contact our sales/technical department– Three-phase motors IP55 tropical insulation, conforming CE norm– The noise levels are only a guide as acoustic properties vary and depend on

the characteristics of the room, connections, viscosity and resonance.– Noise level measured at 30 mm2/s flatted suction at pump– Options: see accessory catalogue


4

0.55

0.5

0.45

0.4

0.35

0.3

0.25

0.2

0.15

0.1

0.05

0

1.2 HYDRAULIC DETAILS1.2.1 Cooling capacity

depending on oil flow and the temperature differential ∆T between the oil inlet and air inletFor calculations with low ∆T values (i.e. below 10 °C), please contact our technical support staff.

Tolerance: ± 5%

Hea

t dis

sipa

tion

at ∆

T =

40

°C [k

W]

Spe

cific

hea

t dis

sipa

tion

[kW

/°C

]*

Oil flow [l/min]

Tolerance: ± 5%

Pre

ssur

e dr

op [b

ar] a

t 30

mm

2 /s

Oil flow [l/min]

1.2.2 Pressure differential ∆∆∆∆∆p measured at 30 mm²/s using mineral oil


* : Values measured at ∆T=40 °C, may vary at lower ∆T values

2.8

2.6

2.4

2.2

2.0

1.8

1.6

1.4

1.2

1.0

0.8

0.6

0.4

0.2

0

0

2

4

6

8

10

12

14

16

18

20

22

0 20 40 60 80 100 120 140 160 180

SC 4S

SC 3S

SC 3L

SC 2S

SC 2L

SC 1SSC 1L

SC 0S

SC 4L

0 20 40 60 80 100 120 140 160 180

SC 1

SC 2

SC 3

SC 4SC 0

For other viscosities the pressure drop must be multiplied by K (these are indicative values only).

5

2. MODEL TYPE(also order example) SCAF 1S / 10 / 1 . 0 / B / M / A / LPF160 / 4 / 1 / GP

Type of coolerSC = Oil/air coolerSCA = Oil/air cooler with built-in feed pumpSCAF = Oil/air cooler with built-in feed pump and filter

Size / motor speed0-4 = see hydraulic details 1.2L = 6 pl (1000 min-1)S = 4 pl (1500 min-1)

Displacement cm³/rev10 = SCA/SCAF 0-1 see technical detail1.28, 40 = SCA/SCAF 2-4 see technical detail1.


Clogging indicators (only SCAF)A = Without clogging indicatorB = With visual indicator (*)

C = With electrical indicatorD = With electrical and optical indicator



Motor voltageA = Standard voltages and frequencies for three–phase motor

50 Hz: 380 - 420 V (Y) / 220-240 V (∆)60 Hz: 440 - 480 V (Y) / 254-277 V (∆)Other special voltages and frequencies on request and clearly written

Size of filter (only SCAF, standard filter included 6 bar bypass valve)SCAF0 = LF60SCAF1 = LPF160SCAF2 = LPF160SCAF3 = LPF160SCAF4 = LPF160

Filtration rating in micron, (only SCAF)8 = 5 µm Betamicron®-3-N (5 BN3HC)4 = 10 µm Betamicron®-3-N (10 BN3HC) (*)

5 = 20 µm Betamicron®-3-N (20 BN3HC)


Other paint on request and clearly written

Accessories (for more information see accessories brochure)IBT = Integrated temperature bypass valve (only available for size 1, 2 and 4)IBP = Integrated pressure bypass valve (only available for size 1, 2 and 4)AITF = Thermostat (available for the temperatures: 50, 60, 70, 80 and 95 °C)GP = Vibration Absorber

* Standard for SCAF unless otherwise specified.

6

3. DIMENSIONS3.1. SC 0S

A1 A2 B C1 C2 D1 D2 D3 E1 E2 E3 ØF W1 W2 Z1 Z2±10 ±10 ±10 ±10 ±10 ±2 ±2 ±2 ±2 ±2 ±2 min.* min.*

SC 0S 372 – 335 335 – 205 285 225 269 32.5 341 9 800 200 G3/4" –SCA 0S 372 – 433 335 – 205 285 225 269 32.5 341 9 800 200 G1/2" G3/4"SCAF 0S 372 386 433 335 344 205 285 225 269 32.5 341 9 800 200 G1/2" G3/4"* for smaller distances please contact our technical office

3.2. SCA 0S - SCAF 0S

7

3.3. SC 1-4L,S


Plug

A1 A2 B C1 C2 D1 D2 D3 E1 E2 E3 ØF W1 W2 Z1 Z2±10 ±10 ±10 ±10 ±10 ±2 ±2 ±2 ±2 ±2 ±2 min.* min.*

SC 1L,S 375 – 520 345 – 320 285 360 289 50.5 47.5 9 1000 300 G3/4" –SCA 1L,S 375 – 601 345 – 320 285 360 289 50.5 47.5 9 1000 300 G1/2" G3/4"SCAF 1L,S 375 390 601 345 486 320 285 360 289 50 47.5 9 1000 300 G1/2" G3/4"SC 2L,S 470 – 602 385 – 390 300 430 389 50 47.5 9 1500 400 G3/4" –SCA 2L,S 470 – 728 385 – 390 300 430 389 50 47.5 9 1500 400 G1 1/4" G3/4"SCAF 2L,S 470 500 728 385 526 390 300 430 389 50 47.5 9 1500 400 G1 1/4" G3/4"SC 3L,S 530 – 703 450 – 470 360 500 439 55 62.5 9 2000 500 G3/4" –SCA 3L,S 530 – 829 450 – 470 360 500 439 55 62.5 9 2000 500 G1 1/4" G3/4"SCAF 3L,S 530 560 829 450 591 470 360 500 439 55 62.5 9 2000 500 G1 1/4" G3/4"SC 4L,S 530 – 703 450 – 470 360 500 439 55.5 54 9 2000 500 G1" –SCA 4L,S 530 – 829 450 – 470 360 500 439 55.5 54 9 2000 500 G1 1/4" G1"SCAF 4L,S 530 560 829 450 591 470 360 500 439 55.5 54 9 2000 500 G1 1/4" G1"* for smaller distances please contact our technical office

3.4. SCA 1-4L,S - SCAF 1-4L,S

Plug

4. CERTIFICATIONFOLLOWING EN 1048Hydac SA design andmanufacture high quality coolersthat are tested and certified togive reliable and repeatable highperformance. To ensure theperformance is accurate, testingin compliance with a recognisedinternational test standard is thebest solution. For air/liquidcoolers this is EN 1048.Hydac SA test procedurecomplies with therequirements ofEN 1048 and boththe procedure andtest equipment areindependentlyinspected and certifiedby TÜV SUDDEUTSCHLAND.The cooler performance details inthis brochure have been testedfollowing EN 1048.

Oil/Air Cooler UnitsStandard series OK-P type

ApplicationThese high performance coolers withaxial fans are suitable for hydrauliccooling applications.Typical applications include: industrialpower units, lubrication systems(i.e. gearboxes) and hydraulic presses.

OK-P Product Features5 Sizes, 12 models16 Bar Dynamic Pressure Rating

OK-P coolers use high efficiency axialfans and strong cooling elements toachieve maximum performance.These units have been designed forstandard applications where maximumperformance is needed at the best price.There are two or three fan speedsavailable for each model so that you canchoose the best combination ofperformance and noise level to suit theapplication.The P-Series is a full industrial qualitycooler designed to meet the demands ofmost applications, at the best priceperformance level available today byusing the latest technology in design.Both 50 Hz and 60Hz models areavailable.

COMPLETE OIL / AIR COOLERWITH AXIAL FAN FORINDUSTRIAL APPLICATIONS.


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OIL/AIR COOLERDESCRIPTIONGENERALIn hydraulic systems energy is trans-formed and transmitted. During thistransformation and transmission lossesoccur, i.e. mechanical and hydraulicenergy is converted into heat. It is thefunction of the cooler to dissipate thisheat.


Environmentally friendly:exchange between air and oil notpossibleFor commissioning only electricalenergy is requiredLow operating costs, no additionalcooling circuit necessary for thecooling medium, i.e. air

CONSTRUCTION FOR OK-P 8-12Oil/air cooler units consists of the (1)heat exchanger, (2) metal housing , (3)feet, (4) axial fan, (5) protection grid, (6)motor.The oil connections are external.

OK-P 8-12OK-P 8-12

3

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Type

of c

oole

r

Mot

or c

apac

ity [k

W] a

t 50H

z

Noi

se le

vel [

dB(A

)] (a

t 1m

dis

tanc

e) a

t 50H

z

Max

. ope

ratin

g pr

essu

re [b

ar]

Max

. oil

tem

pera

ture

[°C

]

Max

. Vis

cosi

ty [m

m²/s

]

Wei

ght [

kg]

– For direction of fan rotation, see arrow on cooler housing.– Electric vent drive: axial drive with forward flow through cooler element (sucking).– Cooling fluid: mineral oil to DIN 51524; for other fluids, please contact our sales/

technical department– Three-phase motors IP55, conforming to CE norm– The noise levels are only a guide as acoustic properties vary and depend on the

characteristics of the room, connections, viscosity and resonance.– Fan protection grid to EN 294


COOLERSELECTION


for mineral oil: 0.915 kg/lCoil = Specific heat capacity [kJ/kgK]

for mineral oil 1.88 kJ/kgKΔT = Temperature increase in the




A 10% safety margin isrecommended to allow forelement contamination, andtherefore the specific power is:P01 × 1.1 = 1.06 kW/°C.The power loss 1.06 kW/°C mustbe dissipated by an oil cooler.Suggestion:–Cooler OK-P 9L,

P01 = 1.12 kW/°C at 180 l/minExample 2:The power loss can also beestimated. With unrestricted flowapprox. 15 to 20% of the drivepower. With restricted flow up to30% of the drive power.


[kW] t × 60

PV = 40 × 1.88 × 0.915 × 400

= 28.7 [kW] 16 × 60

P01 = PV [kW/°C] T1 - T3

P01 = 28.7

= 0.96 [kW/°C] 60 - 30

OK-P8L 6/90 1.1 75 16 130 2000 78 A

OK-P8S 4/100 3.0 87 16 130 2000 83 B or C

OK-P9LL 8/90 0.55 70 16 130 2000 84 A

OK-P9L 6/90 1.1 77 16 130 2000 84 A

OK-P9S 4/100 3.0 89 16 130 2000 89 B or C

OK-P10LL 8/100 1.1 73 16 130 2000 103 A

OK-P10L 6/100 1.5 78 16 130 2000 103 B or C

OK-P10S 4/112 5.5 90 16 130 2000 110 B or C

OK-P11LL 8/100 1.1 77 16 130 2000 126 A

OK-P11L 6/112 2.2 83 16 130 2000 132 B or C

OK-P12LL 8/132 3.0 83 16 130 2000 205 B or C

OK-P12L 6/132 5.5 90 16 130 2000 215 B or C

N° o

f pol

es[-]

/siz

e[-]

Mot

or v

olta

ges

avai

labl

e (s

ee p

ar.3

)

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0.0

0.2

0.4

0.6

0.8

1.0

1.2

1.4

1.6

1.8

2.0

0 25 50 75 100 125 150 175 200 225 250 275 300 325 350 375 400

P8

P9P12P10

P11

0

10

20

30

40

50

60

70

80

90

100

110

120

130

0 25 50 75 100 125 150 175 200 225 250 275 300 325 350 375 400

0

0.25

0.5

0.75

1

1.25

1.5

1.75

2

2.25

2.5

2.75

3

3.25P12L

P12LL

P11L

P11LLP10L

P10LL

P9L

P9LL

P8L

P8SP9S

P10S

1.2. PERFORMANCES1.2.1 Cooling capacity

depending on oil flow and the temperature differential ΔT between the oil inlet and air inlet.For calculations with low ΔT values (i.e. below 10 °C), please contact our technical support staff.

Hea

t dis

sipa

tion

at Δ

T =

40 °

C [k

W]

Oil flow [l/min]

Tolerance: ± 5%

Pre

ssur

e dr

op a

t 30

mm

²/s [b

ar]

Oil flow [l/min]




Tolerance: ± 5%

*: Values measured at ΔT = 40 °C, may vary at lower ΔT values

Spec

ific

heat

dis

sipa

tion

[kW

/°C

] *

5

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2. MODEL TYPE(also order example) OK-P 10L / 1.0 / M / A / 1 / IBP

Type of cooler

Size / motor speedLL = 8 poles (750 rpm)L = 6 poles (1000 rpm)S = 4 poles (1500 rpm)

Type code and modification numberFor the latest version of each cooler,please see the table in our internet site



Motor voltageA = Standard voltages and frequencies for three-phase motor at 50 Hz / 60 Hz

50Hz : 380-420 V (Y) / 220-240 V (Δ)60Hz : 440-480 V (Y) / 254-277 V (Δ)Except for OK-P 12 and OK-P10S, for which the standard voltages are:50Hz : 660-720V (Y) / 380-420V (Δ)60Hz : 760-830V (Y) / 440-480V (Δ)

B = Standard voltages and frequencies for three-phase motor at 50 Hz50Hz : 380-420 V (Y) / 220-240 V (Δ)Except for OK-P 12, for which the standard voltages are:50Hz : 660-720V (Y) / 380-420V (Δ)

C = Standard voltages and frequencies for three-phase motor at 60 Hz60Hz : 440-480 V (Y) / 254-277 V (Δ)Except for OK-P 12, for which the standard voltages are:60Hz : 760-830V (Y) / 440-480V (Δ)

S = Other special voltages and frequencies on request and clearly written

Paint1 = RAL 9005

No other paint available

AccessoriesAITF48 = Thermostat (fixed)IBP = Heat exchanger with integrated bypass valveIBT = Heat exchanger with integrated thermo-bypass valveHF = Horizontal fixing

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3. DIMENSIONS

A1 B C2 C1 E1 E2 Z1 D2 W1 W2±10 ±20 ±10 ±10 ±5 ±5 ±5 min.* min.*

OK-P8L 880 670 760 602 600 178 G1 ¼" 549 1900 700

OK-P8S 880 680 760 602 600 178 G1 ¼" 549 1900 700

OK-P9LL 944 670 841 695 630 192 G1 ¼" 606 2100 800

OK-P9L 944 670 841 695 630 192 G1 ¼" 606 2100 800

OK-P9S 944 680 841 695 630 192 G1 ¼" 606 2100 800

OK-P10LL 1027 680 955 786 760 167 G1 ½" 686 2500 900

OK-P10L 1027 680 955 786 760 167 G1 ½" 686 2500 900

OK-P10S 1027 695 955 786 760 167 G1 ½" 686 2500 900

OK-P11LL 1196 695 1155 910 910 163 G1 ½" 828 2800 900

OK-P11L 1196 695 1155 910 910 163 G1 ½" 828 2800 900

OK-P12LL 1349 798 1335 1016 1060 151 G1 ½" 955 3000 1000

OK-P12L 1349 798 1335 1016 1060 151 G1 ½" 955 3000 1000

*: for smaller distances please contact our technical office


PLUG

4. CERTIFICATION FOLLOWING EN 1048Hydac SA design and manufacture high quality coolers that are tested andcertified to give reliable and repeatable high performance. To ensure theperformance is accurate, testing in compliance with a recognised internationaltest standard is the best solution. For air/liquid coolers this is EN 1048.Hydac SA test procedure complies with the requirements ofEN 1048 and both the procedure and test equipment areindependently inspected and certifiedby TÜV SÜDDEUTSCHLAND.The cooler performance details in this brochure have beentested following EN 1048.

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NOTES

ApplicationThese coolers are designed specificallyfor mobile hydraulic applications wherehigh performance and efficiency arerequired and physical size is minimisedto allow easy installation. Typicalapplications include mobile cranes,concrete mixers and pump trucks, roadpaving machines & transmission cooling.

OK-ELH Product FeaturesThese coolers use a combination of highperformance cooling elements andhydraulic motors to give long trouble freeoperation in arduous mobile hydraulicapplications.The compact design allows the coolersto fit most equipment and provide thehighest cooling performance in heatdissipation whilst minimising spacerequired.

Cooling range 2-140 kW at ΔT 40 °CHydraulic Motors from 6.3 to 22 ccSimple disassembly of components

MOBILE OIL / AIR COOLERSNEW COMPACT DESIGNWITH HYDRAULIC MOTORAND HIGH COOLINGPERFORMANCE

Oil/Air Cooler UnitsMobile application andHydraulic motorOK ELH Type


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ADVANTAGES OF THE OIL/AIRCOOLERS

Environmentally friendly:exchange between air and oil notpossibleFor commissioning only the existinghydraulic power can be used.Low operating costs, no additionalcooling circuit necessary for thecooling medium, i.e. air

CONSTRUCTIONOil/air cooler units consists of the (1)metal housing, (2) motor, (3) axial fan,(4) heat exchanger, (5) finger grid,(6) support and (7) feet. The oilconnections are external.

ELH 2-5

ELH 6-11

ELH 2-5

ELH 6-11

ELH 2-5 ELH 6-11

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Type

of c

oole

r

Ope

ratin

g sp

eed

rang

e [rp

m]

Mot

or d

ispl

acem

ent [

cm³/r

]

Mot

or m

ax. p

ress

ure

[bar

]

Con

tinuo

us m

otor

ope

ratin

g pr

essu

re [

bar]

Min

. oil

mot

or p

ress

ure

Δp* a

t max

. spe

ed [b

ar]

(at 3

4 ct

s)

Mot

or o

il flo

w a

t 150

0 rp

m [

l/min

]

Noi

se le

vel a

t 100

0 rp

m [d

B(A

)](a

t 1m

dis

tanc

e)

Max

. ope

ratin

g p

ress

ure

[bar

]

Max

. oil

tem

pera

ture

[°C

]

Wei

ght [

kg]

– Mounting position: all positions possible– For direction of rotation see arrow on cooler housing– Cooling fluid

Mineral oil to DIN 51524For other fluids, please contact our sales/technical department

– Hydraulic motor operating characteristics:The hydraulic motors are reversible with drain port.The motor oil flow Q can be calculated at nominal motor oil operating pressure asfollows

Q = Vg × n

[l/min]10³ × ηvol

Vg = motor displacement [cm³/r]n = fan speed [rpm]ηvol = volumetric efficiency = 90% at motor oil operating pressure of 150 barMax. outlet side pressure: 120 barMax. drain pressure: 2 barFluid viscosity range: 10-600 mm²/s (recommended 30-45 mm²/s)Fluid temperature range: up to 90 °CMineral oil to DIN 51524/25 DIN 51511Filtration : ISO/DIS 4406 Code 19/16- Filtration grade β25 > 75

– The noise levels are only a guide as acoustic properties vary and depend on thecharacteristics of the room, connections, viscosity and resonance.

– Thermo-bypass for hydraulic motor drive: see chapter 4.– Options: see accessory catalogue

ELH2 110 1000 6.3-14 300-300 250-250 20 10.5-23 69 16 130 2000 113000 22 200 150 36.6

ELH3 110 1000 6.3-14 300-300 250-250 20 10.5-23 69 16 130 2000 133000 22 200 150 36.6

ELH4 150 1000 6.3-14 300-300 250-250 50-30 10.5-23 70 16 130 2000 183000 22 200 150 20 36.6

ELH5 190 1000 6.3-14 300-300 250-250 70-30 10.5-23 70 16 130 2000 243000 22 200 150 20 36.6

ELH6 230 1000 6.3-14 300-300 250-250 150-70 10.5-23 70 16 130 2000 433000 22 200 150 50 36.6

ELH8 300 1000 6.3-14 300-300 250-250 200-80 10.5-23 76 16 130 2000 672800 22 200 150 60 36.6

ELH9 300 1000 14 300 250 130 23 78 16 130 2000 852200 22 200 150 90 36.6

ELH10 300 1000 14 300 250 230 23 82 16 130 2000 1101800 22 200 150 130 36.6

ELH11 300 1000 14 300 250 250 23 83 16 130 2000 1551600 22 200 150 150 36.6

Oil

flow

at 1

.5 b

ar p

ress

ure

drop

[l/m

in]

Max

. Vis

cosi

ty [m

m²/s

]

COOLERSELECTION


for mineral oil: 0.915 kg/lCoil = Specific heat capacity [kJ/kgK]

for mineral oil 1.88 kJ/kgKΔT = Temperature increase in the




A 10% safety margin isrecommended to allow forelement contamination, andtherefore the specific power is:P01 × 1.1 = 0.175 kW/°C.The power loss 0.175 kW/°C mustbe dissipated by an oil cooler.Suggestion:–Cooler OK-ELH2 - 3000 rpm,

P01 = 0.20 kW/°C at 80 l/minExample 2:The power loss can also beestimated: With unrestricted flowapprox. 15 to 20% of the drivepower. With restricted flow up to30% of the drive power.


[kW] t × 60

PV = 25 × 1.88 × 0.915 × 100

= 4.78 [kW] 15 × 60

P01 = PV [kW/°C] T1 - T3

P01 = 4.78

= 0.159 [kW/°C] 60 - 30

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1.2. HYDRAULIC DETAILS1.2.1 Cooling capacity


OK-ELH2-5Tolerance: ± 5%

Hea

t dis

sipa

tion

at Δ

T =

40 °

C [k

W]

Spec

ific

heat

dis

sipa

tion[

kW/°

C] *

Oil flow [l/min]

* : Values measured at ΔT = 40 ºC, may vary at lower ΔT values.

Hea

t dis

sipa

tion

at Δ

T =

40 °

C [k

W]

Spec

ific

heat

dis

sipa

tion[

kW/°

C] *

Oil flow [l/min]

* : Values measured at ΔT = 40 ºC, may vary at lower ΔT values.


0

4

8

12

16

20

24

28

32

0 20 40 60 80 100 120 140 160 180 200 220 240 260 280 300 3200

0

0

0

0

0

0

0

0

ELH2 1500 rpm

ELH2 3000 rpmELH3 1500 rpm

ELH3 3000 rpm

ELH4 1500 rpm

ELH4 3000 rpm

ELH5 1500 rpm

ELH5 3000 rpm0.8

0.7

0.6

0.5

0.4

0.3

0.2

0.1

0

0

14

28

42

56

70

84

98

112

126

140

0 30 60 90 120 150 180 210 240 270 300 330 360 390 420 4500

0

2

2

3

3

ELH8 1000 rpm

ELH11 1600 rpm

ELH9 1000 rpm

ELH11 1000 rpm

ELH8 2800 rpm

ELH6 3000 rpm

ELH6 1000 rpm

ELH10 1800 rpm

ELH10 1000 rpm

ELH9 2200 rpm

3.5

3

2.5

2

1.5

1

0.5

0

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Pre

ssur

e dr

op a

t 30

mm

²/s [b

ar]

Oil flow [l/min]

Pre

ssur

e dr

op a

t 30

mm

²/s [b

ar]

Oil flow [l/min]




0,0

0,4

0,8

1,2

1,6

2,0

2,4

2,8

3,2

3,6

0 30 60 90 120 150 180 210 240 270 300 330

ELH2

ELH5

ELH3

ELH4

3.6

3.2

2.8

2.4

2.0

1.6

1.2

0.8

0.4

0.0

2.0

1.8

1.6

1.4

1.2

1.0

0.8

0.6

0.4

0.2

0.00

2

4

6

8

2

4

6

8

2

0 40 80 120 160 200 240 280 320 360 400 440

ELH8

ELH11ELH10

ELH9

ELH6

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2. MODEL TYPE(also order example) OK-ELH2 / 1.0 / H6.3TB / 1 / S / AITF50

Type of coolerOK ELH = Oil/air cooler

Size / motor speed2-11 = See hydraulic details 1.2.

Type code and modification number

Hydraulic motor displacementH6.3 = 6.3 cm3/rH14 = 14 cm3/rH22 = 22 cm3/rH..TB = hydraulic motor with thermo-bypass (for more information see chapter 4)



Accessories (for more information see brochure accessories)AITF50 = Thermostat (fixed)LFM = Air filter on the air suction (Attention: with clean filter the cooling power decreases by ~8%)LFG = Air filter grid on the air suction (Attention: with clean filter the cooling power decreases by ~5%)GP = Vibration AbsorberFU = Feet for alternative mounting arrangement (only for ELH2-5; for the others the feet are already included)IBP = Heat exchanger with integrated bypassIBT = Heat exchanger with integrated thermo-bypass

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A1 B ±10 B ±10 B ±10 C1 E1 E2 E3 E4 E5 F W1 W2 Z1 Plug±5 6.3 cc 14 cc 22 cc ±5 ±5 ±5 ±5 ±2 ±2 min min

ELH2 313 270 283 297 384 199 57 324 288 80 14X10 200 150 G1" M22X1.5ELH3 356 279 292 306 420 230 63 370 329 100 14X10 250 180 G1" M22X1.5ELH4 450 294 306 321 500 289 80 450 421 150 13X10 350 200 G1" M22X1.5

3. DIMENSIONS

3.1. ELH2-4

4xM6 depth 13

Plug

Drain portM12x1.5depth 13

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A1 B ±10 B ±10 B ±10 C1 E1 E2 E3 E4 E5 F W1 W2 Z1 Plug±5 6.3 cc 14 cc 22 cc ±5 ±5 ±5 ±5 ±2 ±2 min min

ELH5 460 311 323 338 602 350 55 490 200 580 φ12 400 250 G1 1/4" M22X1.5

3.2. ELH5

4xM6 depth 13

Plug


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A1 B±10 B±10 B±10 B1 C1 D1 D2 D3 D4 E1 E2 E3 ØF W1 W2 Z1 Z2 Z3±10 6.33cc 14cc 22cc ±5 ±10 ±2 ±2 ±2 ±2 ±5 ±5 ±5 min* min*

OK-ELH6 635 383 395 410 72 593 255 482 295 620 500 75 103 9 1000 600 G1 ¼" 88 M22x1.5OK-ELH8 762 383 395 410 53 695 255 482 295 749 628 75 94 9 1100 700 G1 ¼" 97 G3/4"

3.3. ELH6-8

4xM6 depth 13Plug


Top fixingpointsM8 (2x)

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3.4. ELH9-11

4xM6 depth 13

Plug


Top fixing pointsM8 (2x)

A1 B±10 B±10 B1 C1 D1 D2 D3 D4 E1 E2 E3 ØF W1 W2 Z1 Z2 Z3±10 14cc 22cc ±5 ±10 ±2 ±2 ±2 ±2 ±5 ±5 ±5 min* min*

OK-ELH9 910 504 519 45 790 410 700 450 880 760 85 92 9 1200 900 G1 ½" 114 G3/4"OK-ELH10 1060 526 541 46 971 460 700 500 1030 910 90 93 9 1400 900 G1 ½" 114 G3/4"OK-ELH11 1180 545 560 47 1050 460 700 500 1150 1060 75 93 9 1600 1000 G1 ½" 119 G3/4"

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4. TEMPERATURE SENSING VARIABLE SPEEDHYDRAULIC MOTOR

4.1. DESCRIPTIONThe thermo valve is a pre-controlled pressure valve with temperature-dependent pressure control and is mounted on the hydraulic motor in place ofthe existing cover plate.The pressure setting of the valve automatically changes dependent on thetemperature and thus controls the motor speed. In addition to the actualtemperature-controlled pressure setting, a mechanical maximum pressurecontrol and a recharging valve are fitted as a non-return valve.The switching temperature values can be set from 40 to 70 °C and thepressure can be controlled up to 100 °C: please contact our sales for thedimensioning of the thermo-bypass.All the standard hydraulic motors can be used with the thermo-bypass.The minimum oil pressure at which the thermo control starts to work is 8 bar,i.e. a maximum residual power consumption corresponding to8 bars is to be foreseen also in by-pass phase.

4.3. SCHEME

4.2. DIMENSIONS


5. CERTIFICATIONFOLLOWING EN 1048Hydac SA design andmanufacture high quality coolersthat are tested and certified togive reliable and repeatable highperformance. To ensure theperformance is accurate, testingin compliance with a recognisedinternational test standard is thebest solution. For air/liquidcoolers this is EN1048.Hydac SA test procedurecomplies with the requirements ofEN1048 and both the procedureand test equipment areindependently inspected andcertified by TÜVSÜDDEUTSCHLAND.The cooler performance detailsin this brochure have been testedfollowing EN1048.

Oil/Air Cooler UnitsMobile series with DC motorOK-ELD Type

ApplicationThese coolers are designed specificallyfor mobile hydraulic applications wherehigh performance and efficiency arerequired and physical size must beminimised to allow easy installation.Typical applications include mobilecranes, concrete mixers and pumptrucks, road paving machines &transmission cooling.

OK-ELD Product FeaturesThese coolers use a combination of highperformance cooling elements and highcapacity, long life DC electric poweredfans to give long trouble free operation inarduous mobile hydraulic applications.The compact design allows the coolersto fit most equipment and provide thehighest cooling performance in heatdissipation whilst minimising spacerequired.

Cooling range 2-34 kWDC motors in 12 Volt & 24 Volt withmotor lifetimes up to 16,000 hoursHydraulic pressure 16 bar dynamic

MOBILE OIL / AIR COOLERSNEW COMPACT DESIGNWITH DC ELECTRIC FANSAND HIGH COOLINGPERFORMANCE

Test procedure certified following EN 1048 PL/E

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CONSTRUCTIONOil/air cooler units consist of the (1) heatexchanger, (2) housing (3) axial motorfan.The oil connections are on the rear side.

ELD 0-4.5

ELD 5-6

ELD 0-4.5

ELD 5-6

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1. TECHNICAL DETAILS1.1 TABLE OF TECHNICAL SPECIFICATIONS

Type

of c

oole

r

Oil

flow

at 1

.5 b

ar p

ress

ure

drop

[l/m

in]

Cur

rent

dra

w a

t nom

inal

vol

tage

[A]

Mot

or c

apac

ity [k

W]

Rec

omm

ende

d fu

se (i

ndic

ativ

e on

ly) [

A]

Fan

diam

eter

[mm

]

Pro

tect

ion

clas

s IP

[-]

Noi

se le

vel [

dB(A

)] (a

t 1m

dis

tanc

e)

Max

. ope

ratin

g p

ress

ure

[bar

]

Max

. oil

tem

pera

ture

[°C

]

Wei

ght [

kg]

– DC axial motor type: maximum speed should be protected with a suitable externalfuse

– Mounting position: all positions possible but for applications requiring verticalmotor axis it is recommended to mount the cooler with motor downloads(see arrows on the motor)

– For direction of rotation: see arrow on cooler housing– Cooling fluid mineral oil to DIN 51524

For other fluids, please contact our sales/technical department– The noise levels are only a guide as acoustic properties vary and depend on the

characteristics of the room, connections, viscosity and resonance.– Options: see accessory catalogue


COOLERSELECTION


for mineral oil: 0.915 kg/lCoil = Specific heat capacity [kJ/kgk]

for mineral oil 1.88 kJ/kgkΔT = Temperature increase in the




A 10% safety margin isrecommended to allow forelement contamination, andtherefore the specific power is:P01 × 1.1 = 0.175 kW/°C.The power loss 0.175 kW/°C mustbe dissipated by an oil cooler.Suggestion:–Cooler OK-ELD2,

P01 = 0.190 kW/°C at 40 l/minExample 2:The power loss can also beestimated: With unrestricted flowapprox. 15 to 20% of the drivepower. With restricted flow up to30% of the drive power.


[kW] t × 60

PV = 25 × 1.88 × 0.915 × 100

= 4.78 [kW] 15 × 60

P01 = PV [kW/°C] T1 - T3

P01 = 4.78

= 0.159 [kW/°C] 60 - 30

ELD0 12 30 3.0 0.05 5 140 67 68 16 130 2000 2.7

ELD0 24 30 1.6 0.05 5 140 67 68 16 130 2000 2.7

ELD1 12 90 8.0 0.10 15 190 67 73 16 130 2000 4.0

ELD1 24 90 3.2 0.10 7.5 190 67 73 16 130 2000 4.0

ELD2 12 170 9.4 0.14 20 255 67 74 16 130 2000 9.4

ELD2 24 170 5.2 0.14 15 255 67 74 16 130 2000 9.4

ELD3 12 180 17.5 0.23 25 305 67 79 16 130 2000 11

ELD3 24 180 8 0.23 20 305 67 79 16 130 2000 11

ELD4 12 180 22.5 0.30 30 385 67 76 16 130 2000 15.9

ELD4 24 180 10.5 0.30 20 385 67 76 16 130 2000 15.9

ELD4.5 12 280 22.5 0.30 30 385 67 76 16 130 2000 22

ELD4.5 24 280 10.5 0.30 20 385 67 76 16 130 2000 22

ELD5 12 170 35 0.46 2x25 305 67 80 16 130 2000 30.3

ELD5 24 170 16 0.46 2x20 305 67 80 16 130 2000 30.3

ELD6 12 140 45 0.60 2x30 385 67 77 16 130 2000 36.6

ELD6 24 140 21 0.60 2x20 385 67 77 16 130 2000 36.6

Volta

ge [V

]

Max

. vis

cosi

ty [m

m2 /s

]

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0

5

10

15

20

25

30

35

40

0 20 40 60 80 100 120 140 160 1800

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1

ELD 6

ELD 5

ELD 4

ELD 3

ELD 2

ELD 1

ELD 4.5

ELD 0

0.0

0.2

0.4

0.6

0.8

1.0

1.2

1.4

1.6

1.8

2.0

2.2

2.4

0 20 40 60 80 100 120 140 160 180

ELD 4ELD 2

ELD 1

ELD 6

ELD 3

ELD 5

ELD 0

ELD 4.5

1.2 HYDRAULIC DETAILS1.2.1 Cooling capacity


Hea

t dis

sipa

tion

at Δ

T =

40 °

C [k

W]

Spec

ific

heat

dis

sipa

tion

[kW

/°C

]

Oil flow [l/min]

Tolerance: ± 5%

Pre

ssur

e dr

op a

t 30

mm

²/s [b

ar]

Oil flow [l/min]For other viscosities the result must be multiplied by K




Tolerance: ± 5%

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2. MODEL TYPE(also order example) OK-ELD1H / 3.1 / 12V / 1 / S / AITF60

Type of coolerOK-ELD = Oil/air cooler

Size / motor speed0-6 = See hydraulic details 1.2H = 3000 min-1


Electrical motor fan voltage12V = 12 Volts DC24V = 24 Volts DC

Paint1 = RAL 9005 (Standard)Other paint on request and clearly written


Accessories (for more information see brochure accessories)AITF = Thermostat (fixed)GP = Vibration AbsorberFU = Feet for alternative mounting arrangementIBP = Heat exchanger with integrated bypass valve (not available for ELD0 and ELD1)IBT = Heat exchanger with integrated thermo-bypass valve (not available for ELD0 and ELD1)

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3. DIMENSIONS

3.1. ELD0

A1 B C1 E1 E2 E3 E4 E5 F W1 W2 Z1 Plug±5 ±10 ±5 ±5 ±5 ±5 ±2 ±2 min min

ELD0 202 140 240 72 79 10 60 190 6.5 100 80 G1/2" -ELD1 245 120 300 125 60 250 225 90* 9 200 100 M22X1.5 M22X1.5ELD2 315 210 385 199 58 324 288 80 14X10 250 150 G1" M22X1.5ELD3 356 210 420 230 62.5 370 329 100 14X10 300 180 G1" M22X1.5ELD4 450 208 500 289 80 450 421 150 16X9 400 200 G1" M22X1.5ELD4.5 454 218 602 350 52 490 200* 580* 12 400 200 G1 1/4" M22X1.5* OK-ELD1 and OK-ELD4.5 have only the four external fixing points

Plug

Fixing point dimensions6x ØF

3.2. ELD1-4


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3.3. ELD5-6

A1 B C1 E1 E2 E3 E4 E5 F W1 W2 Z1 Plug±5 ±10 ±8 ±5 ±5 ±5 ±2 ±2 min min

ELD5 480 235 810 321 77 750 450 170 16X9 400 200 G1 1/4" M22X1.5ELD6 532 233 950 373 77 890 503 200 18X9 500 250 G1 1/4" M22X1.5

Plug


5. NOTEThe information in this brochure relates to the operatingconditions and applications described.For applications or operating conditions not described,please contact the relevant technical department.Subject to technical modifications.

4. CERTIFICATION FOLLOWING EN 1048Hydac SA design and manufacture high quality coolersthat are tested and certified to give reliable andrepeatable high performance. To ensure theperformance is accurate, testing in compliance with arecognized international test standard is the bestsolution. For air/liquid coolers this is EN1048.Hydac SA test procedure complies withthe requirements of EN 1048 and boththe procedure and test equipment areindependently inspected and certifiedby TÜV SÜDDEUTSCHLAND.The cooler performance details inthis brochure have been tested following EN 1048.

Oil/Air Cooler Units Standard series - Accessories

In many industrial applications the Oil/Air coolers require accessories, either controlling or protecting the cooler and the hydraulic system. The accessories can be mounted on most of the models of Hydac coolers and they are available in the commonly required sizes and range of settings. The cooler can be ordered with the required accessories already integrated; most of them are also available separately and can be added later to the cooler, generally with a mounting kit. The catalogue is divided in three sections: l A general description of each

accessory and its function l A more detailed part describing the

technical features and how they are mounted to the coolers

l A table indicating on which coolers

each accessory is possible to mount.

Date of creation: 09.05.07

HYDAC SA – COOLING SYSTEMS Zona Industriale 3 Via Sceresa 6805 Mezzovico Switzerland Tel. + 41 91 935 57 09 Fax.+ 41 91 935 57 01 www.hydac.ch E-Mail: [email protected]

TR

TF

IBT

IBP

1. PRODUCT DESCRIPTIONS

TR/AITR - THERMOSTAT ADJUSTABLE This unit is an electrical switch, opening or closing the circuit at the selected temperature. It can be mounted in one of the cooling element free ports, depending on the model or mounted in the oil tank of the hydraulic circuit. TR is the pure thermostat; AITR is the full kit

TF/AITF – THERMOSTAT FIXED This unit is an electrical switch, closing the circuit at a certain fixed temperature (normally open). It can be mounted in one of the cooling element free ports, depending on the model. TF is the pure thermostat; AITF is the full kit including the adaptors, depending on the model of cooler. Now also available with integrated O-ring to ensure appropriate sealing.

IBT – INTEGRATED BYPASS THERMO It lets the oil pass through the cooling element only above a certain temperature. Warning: This valve is added to a cooling element in conjunction with a flow channel that is braised into the original construction. (It needs one special cooling element )

IBP - INTEGRATED BYPASS PRESSURE Allows the oil to bypass the cooling element when the pressure exceeds a certain value. Warning: This valve is added to a cooling element in conjunction with a flow channel that is braised into the original construction. (It needs one special cooling element )

depth filter media and is designed to remove can be supplied fitted to the cooler or

AITR

AITF IBT IBP

ϑ

ELECTRICAL BOX

FEET

GP

GP – VIBRATION ABSORBERS These are rubber elements, that are mounted between the cooler and the base; they absorb the vibrations.

FEET OK-ELD models do not have feet fitted as standard. These are available for this series as an options.

ELECTRICAL BOX It controls the cooler, switching on/off the three-phase motor depending on the oil temperature (the signal has to come from an external thermostat applied to the oil circuit) and mainly prevents the motor from the overload: a thermal switch interrupts the circuit when the electrical current exceeds the selected value.

EXTERNAL ELECTRIC INVERTER It controls the cooler, by acting on the engine with the results of modulating the fan-speed, therefore changing air speed and modulating cooling power. The advantage is to have low noise when not full power is required. The advantage is to have a constant temperature in the outlet oil. At 50 Hz it is possible to over boost the engine at 60 Hz for small actuation time.

EXTERNAL INVERTER BOX

GP - MOUNTING KIT FEET - MOUNTING KIT ELECTRICAL BOX - MOUNTING KIT DIAGRAM COOLER + EXT INVERTER

2. AVAILABILITY ON THE DIFFERENT COOLER TYPES

OK EL1

OK-

EL2-11

OKA

EL4-11

OKAF EL4-11

SC 1-4

SCA 1-4

SCAF 1-4

OK-ELD 1-6

OK-ELH 2-5

OK-ELH 6-11

OK- P

8-12

OK-ELC 1-7

AITR x x x x x x x x***** x x

AITF x x x x x x

IBT x x x x x x** x x x x**

IBP x x x x x x** x x x x**

GP x x x x x x x* x* x x x****

FEET standard standard standard standard standard standard x x standard standard standard

ELECT.BOX x x x x x

EXT. INVERTER x*** x***

*: only if feet are mounted **: not available for ELD1, ELC1 ***: only from EL-8 to EL-11 ****: available also for ELC0 *****: not valid for ELH8

TR

3. TECHNICAL DETAILS 1.1 TR/AITR

Temperature range 0-90 +/-3°C Switching differential 4-8°C Storage Temperature -15°C / +55°C Contacts Ag 1000/1000 Contacts capacity C1/C2 10(2.5)A 250 V / 6(2.5)A 250 V Hydraulic connection thread M 22 x 1.5 Max. head temperature 80°C Max. bulb temperature 125 °C Rate of T° change 1 K/min Degree of protection IP 40 Tracking resistance PTI 250(KB250) Max. hydr. pressure 10 bar MODEL TYPE (also order example): AITR / OK-EL6

Connection block with thermostat: AITR: full kit TR 1: only thermostat

OK-EL1-5 / SC1-4 OK-EL6-11 OK-ELC1-7 1.2 TF/AITF Operating Temperature -20°C / +120°C Case: brass Contacts: N.O. (Normally Open) Switching differential 10°C at temperature change rate of 0.5°C/min Tolerance +/-3.5°C at temperature change rate of 1°C/min Operating voltage/current 220VAC / 10A – 125 VAC / 15A – 12-24 VDC / 10A Minimum operating current 70mA Electrical connections according to EN 175301-803 Type A Hydraulic connection thread M22X1.5 standard Seal material NBR Life time 100.000 cycles Protection degree IP65 standard Max. pressure 200 bar Weight 70 g (Option): 12 - 24VDC integrated relè max 30A MODEL TYPE (also order example): AITF 50 (RE 12V) / OK-EL6 Relè’s Voltage Integrated Relè

Switching ON temperature Connection block with thermostat: AITF: full kit

TF: only thermostat AVAILABLE RANGES

Note: if ordered as kit, the type of cooler where mounted must be mentioned


TF

MOUNTING POSITIONS:

SAME OF AITR (SEE ABOVE)

Switching ON T (°C)

Switching OFF T (°C)

100 90

90 80

80 70

70 60

60 50

50 40

40 30

Warning: This valve is added to a cooling element in conjunction with a flow channel that is braised

into the original construction. ( It needs one special cooling element which maintains the same dimensions and fixing

points )

Warning: This valve is added to a

cooling element in conjunction with a flow channel that is braised into the original

construction. (It needs one special cooling element which maintains the same dimensions and fixing

points)

1.3 IBT - Fixed setting temperature value - precise temperature control - low pressure drop - shock resistant - can function in any position - max. permitted pressure: 16 bar - maintenance-free

MODEL TYPE (also order example): OK-ELC4 IBT 45 / 2 (3) (4) (6) Opening pressure drop: 2, 3, 4, 6 bar

Starting Closing temperature IBT: thermostatic bypass valve

1.4 IBP Technical Data Available with opening pressure drop of : 2 bar >> IBP2 3 bar >> IBP3 4 bar >> IBP4

6 bar >> IBP6 MODEL TYPE (also order example): OK-ELC4/ IBP 2 (3) (4) (6)

Integrated bypass valve

Note: the type of cooler where mounted must be mentioned


IBT

In oil

IBP

In oil

Technical Data Available with closing temperatures of : 25 °C >> IBT25-2 (3) 45 °C >> IBT45-2 (3) (4) (6) 50 °C >> IBT50-2 (3) 55 °C >> IBT55-2 60°C >> IBT60-2 (3) 65°C >> IBT65-2

For more information contacts the technical office

Opening pressure

1.5 GP GP: - Material: NR - Hardness: 57+/-5 Sh MODEL TYPE (also order example): GP / OK-EL6

vibration absorbers

1.6 FEET FOOT: - The foot has to be mounted using a screw already existing in the cooler (fixing the element to the housing) plus an additional screw supplied together with the foot MODEL TYPE (also order example): FU / OK-ELD6

pair of feet

OK-ELH2-5 OK-ELD1-6


OK-EL1,2,3; SC1 OK-ELH6; OK-ELC1-7

OK-EL4,5,6; SC-2,3

OK-EL8 OK-ELH8

OK-EL9,10,11 OK-ELH9,10,11

Dim. A mm

Dim. B mm

Dim. C mm

OK-ELD1 265 210 11

OK-ELD2 249 210 11

OK-ELD3 289 210 11

OK-ELD4 389 210 11

OK-ELD4.5 342 210 9

OK-ELD5 599 210 11

OK-ELD6 689 210 11

OK-ELH2 160 255 9

OK-ELH3 240 255 9

OK-ELH4 255 255 9

OK-ELH5 255 255 9


52.5

15

1.7 ELECTRICAL BOX ELECTRICAL BOX:

- Solenoid starter voltages: from 200V to 600V - Thermal switch size: from 1.0A to 10A 200-400V 600V - With and without external Cable

MODEL TYPE (also order example): EL.BOX / OK-EL6

Electrical box


_______________________________________________________________________________________________________________________

1.8 EXTERNAL ELECTRIC INVERTER Max. Power 4 kW (possibility to add a second slave module of 4kW ) Max. Tension 440V Cooling independent fan mounted on the dissipaters Protection degree IP66 Control method sine waves PWM Frequency range 10 to 60 Hz Protection features current overload / short-circuit / phase loss / thermal protection Operating temperature -20 to 45 °C Remote display possibility of monitoring mains parameters on display MODEL TYPE (also order example): INV.EXT / OK-EL8

Inverter External


270

230

145

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Operation DataFluids Oils (mineral oils, synthetic oils, high viscosity oils,

biological oils, phosphate ester)Water-glycol (cooling fluid)HFC pressure fluids

Viscosity AC-LN: 2.000 mm²/s (standard)ACA-LN / ACAF-LN: see technical data

Temperature range Minimum / maximum ambient temperature: -20 °C to +40 °C (standard)Maximum temperature of the medium: +130 °CPlease contact the technical sales department in the event of deviating temperatures.Notice!Fan switching frequency at max. fan speed (max. volume of air) must be avoided when operating a cooler at which the temperature difference between the medium inlet at the cooler and the ambient temperature can be greater than 50°C. Quick changes in the temperature of the cooling element material can lead to a significant reduction in service life or to direct damage of the cooling element due to thermal shock. Please contact the technical sales department to receive information about controlled fan drives.

Pressure resistance of the cooling element

Dynamic operating pressure: 16 barStatic operating pressure: 21 bar

Fan Axial fan in suction version (standard)Axial fan in blowing version on request (note: with blowing version approx. 10 % less cooling capacity)

Motor Three-phase motorEfficiency class IE2Protection class IP55Insulation class FOther versions on request

ErP The fan unit of the AC-LN corresponds to the minimum efficiency levels specified in the Ecodesign directive or ErP directive (Energy-related Products) 2009/125/EC.

Pump (only ACA-LN/ACAF-LN)

Screw pump with separate motorPump motor speed: 3.000 rpmNegative suction pressure of the pump: max. -0.4 bar

Noise levels See technical data AC-LN and ACA-LN / ACAF-LNThe noise levels are only reference values as the acoustic properties of a room, connections and reflection have an effect on the noise level.

Accessories Integrated pressure bypass valve (IBP) or integrated thermal pressure bypass valve (IBT) (cannot be retrofitted, also see options)ThermostatsAir filter grid or air filter matVibration damper

Air Cooler IndustryAC-LN / ACA-LN / ACAF-LN 8-14

GeneralThe AC-LN 8-14 air cooler series can be used in all areas where either oil or water-glycol is to be cooled with air. The coolers with an axial fan can be used in the return line as well as in the bypass flow.The wide range of accessories and optional versions mean that the coolers can be adapted flexibly to various applications.

Product FeaturesThe air flow of the cooler has been optimized by the use of a more efficient axial fan and a variety of housing modifications. As a result, the AC-LN series 8-14 is especially efficient and quiet.The cooler can also be used in the bypass flow by attaching a boost pump. An additional filter enables continuous filtration of the medium; the cooler can then be connected as required.

l Large product range l Large cooling performance range l Modular design

Symbol

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2

1

2

3

4

12

3

4

1 Motor2 Axial fan3 Fan housing4 Heat exchanger

Application FieldSystems with high cooling requirements, such as:

l Hydraulic systems l Lubrication systems l Gears l Motors l Generators l Converters l Machine tools

OptionsIntegrated pressure bypass valve (IBP) / Integrated thermal pressure bypass valve (IBT)The bypass channel is integrated in the cooling element. If a particular pressure is exceeded, the IBP opens the bypass channel, thereby protecting the cooling element from too high a pressure. Furthermore, the IBT only opens the cooling element path once a particular temperature has been reached.

Large coolersCoolers with a higher cooling capacity than standard are also available as special versions.

Speed control: AC-LN MIThe integrated frequency converter enables stepless speed control dependent on the oil temperature in the cooling element.

ATEXThe AC-LN (without pump and filter) is also available for operation in gas and dust explosive areas. The ATEX certification applies for a frequency of 50 Hz and 60 Hz.

MarineThe MAR version is for aggressive ambient conditions, such as industrial atmospheres, high humidity or high salt content, which place great demands on the corrosion resistance and robustness of the materials used.

Cold Climate / Hot ClimateUse in extreme ambient conditions: Cold Climate to -40 °C, Hot Climate to +60 °C

The various versions can also be combined. Our technical sales department will be happy to assist you further.

DesignAC-LN 8-9-10-11

AC-LN 12-14

1 Motor2 Axial fan3 Fan housing4 Heat exchanger

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1

2

3

4

6

5

DesignACA-LN8-9-10-11

ACAF-LN8-9-10-11

1 Drive motor2 Axial fan3 Low-noise screw pump4 Fan housing5 Heat exchanger

With external motor-pump assembly attached onto the base frame.

1 Drive motor2 Axial fan3 Low-noise screw pump4 Fan housing5 Heat exchanger6 Filter

With external motor-pump assembly attached onto the base frame.The filter is equipped with a visual clogging indicator as standard.

1

2

3

4 5

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Technical DataAC-LN

Type

of c

oole

r

P/N

Flui

d [-]

1)

Flui

d flo

w [l

/min

]2)

Air

flow

[m3 /h

]

Fan

mot

or:

Pole

s / s

ize

/ flan

ge

Fan

mot

or: P

ower

/

curr

ent a

bsor

ptio

n [k

W /

A]3)

Noi

se le

vel (

at 1

m d

ista

nce,

50

Hz)

[dB

(A)]

Volu

me

[l]4)

Wei

ght [

kg]5)

VERSION B: 50 Hz

AC-LN8L 3686293 F 350 5,800 6/90/B14 0.75 / 2.0 68 6 72

AC-LN8S 3686305 F 350 8,700 4/90/B14 1.5 / 3.3 79 6 72

AC-LN9L 3686306 F 350 7,500 6/90/B14 0.75 / 2.0 67 11 100

AC-LN9S 3770160 F 350 10,900 4/90/B14 1.5 / 3.3 80 11 100

AC-LN10L 3686307 F 540 11,300 6/90/B14 1.1 / 2.65 71 14 129

AC-LN10S 3773324 F 540 16,500 4/100/B14 3.0 / 6.0 77 14 129

AC-LN11L 3686308 F 540 17,400 6/112/B14 2.2 / 4.6 75 18 170

AC-LN11S 3773334 F 540 23,600 4/112/B14 4.0 / 7.7 81 18 170

AC-LN12L 3704261 F 840 22,600 6/90/B14 1.1 / 2.65 74 28 290

AC-LN12S 3773864 F 840 33,000 4/100/B14 3.0 / 6.0 80 28 290

AC-LN14L 3704260 F 840 34,800 6/112/B14 2.2 / 4.6 78 35 320

AC-LN14S 3773890 F 840 47,200 4/112/B14 4.0 / 7.7 84 35 320

VERSION C: 60 Hz

AC-LN8L 3763003 F 350 6,150 6/90/B14 0.9 / 2.0 71 6 72

AC-LN8S 3763036 F 350 8,700 4/90/B14 1.8 / 3.3 83 6 72

AC-LN9L 3763004 F 350 7,500 6/90/B14 0.9 / 2.0 70 11 100

AC-LN9S 3772994 F 350 10,900 4/90/B14 1.8 / 3.3 83 11 100

AC-LN10L 3733086 F 540 12,000 6/90/B14 1.3 / 2.7 74 14 129

AC-LN10S 3774291 F 540 16,400 4/100/B14 3.6 / 7.2 80 14 129

AC-LN11L 3763035 F 540 18,300 6/112/B14 2.6 / 4.6 78 18 170

AC-LN11S 3774293 F 540 23,600 4/112/B14 4.8 / 8.0 84 18 170

AC-LN12L 3765763 F 840 24,000 6/90/B14 1.3 / 2.7 77 28 290

AC-LN12S 3774304 F 840 32,800 4/100/B14 3.6 / 7.2 83 28 290

AC-LN14L 3765740 F 840 36,600 6/112/B14 2.6 / 4.6 81 35 320

AC-LN14S 3774312 F 840 47,200 4/112/B14 4.8 / 8.0 87 35 3201) Medium: F = mineral oil or water-glycol, M = mineral oil 2) Max. flow rate3) Current requirement: B version at 400 V – 50 Hz / C version at 480 V – 60 Hz, AC-LN 12-14: each motor4) Fluid in cooling element5) Unfilled

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Technical DataACA-LN / ACAF-LN

Type

of c

oole

r

Flui

d [-]

1)

Flui

d flo

w [l

/min

]

Air

flow

[m3 /h

]

Pum

p di

spla

cem

ent [

cm3 /U

]

Max

. vis

cosi

ty [m

m2 /s

] co

ntin

uous

wor

king

2)

Pum

p m

otor

: pow

er /

cu

rren

t abs

orpt

ion

[kW

/ A]3)

Fan

mot

or:

Pole

s / s

ize

/ flan

ge

Fan

mot

or: p

ower

/

curr

ent a

bsor

ptio

n [k

W /

A]3)

Filte

r siz

e [-]

Noi

se le

vel (

at 1

m d

ista

nce,

50

Hz)

[dB

(A)]

Volu

me

[l]4)

Wei

ght [

kg]5)

40/58 69

VERSION B: 50 Hz

ACA-LN8L M 100/150/180 5,800 40/58/69 320/130/240 3.0 / 6.7 5.5 / 10.4 6/90/B14 0.75 / 2.0 - 68 6 102

ACA-LN8S M 100/150/180 8,700 40/58/69 320/130/240 3.0 / 6.7 5.5 / 10.4 4/90/B14 1.5 / 3.3 - 79 6 102

ACAF-LN8L M 100/150/180 5,800 40/58/69 320/130/240 3.0 / 6.7 5.5 / 10.4 6/90/B14 0.75 / 2.0 LPF280 68 6 110

ACAF-LN8S M 100/150/180 8,700 40/58/69 320/130/240 3.0 / 6.7 5.5 / 10.4 4/90/B14 1.5 / 3.3 LPF280 79 6 110

ACA-LN9L M 100/150/180 7,500 40/58/69 320/130/240 3.0 / 6.7 5.5 / 10.4 6/90/B14 0.75 / 2.0 - 67 11 132

ACA-LN9S M 100/150/180 10,900 40/58/69 320/130/240 3.0 / 6.7 5.5 / 10.4 4/90/B14 1.5 / 3.3 - 80 11 132

ACAF-LN9L M 100/150/180 7,500 40/58/69 320/130/240 3.0 / 6.7 5.5 / 10.4 6/90/B14 0.75 / 2.0 LPF280 67 11 140

ACAF-LN9S M 100/150/180 10,900 40/58/69 320/130/240 3.0 / 6.7 5.5 / 10.4 4/90/B14 1.5 / 3.3 LPF280 80 11 140

ACA-LN10L M 100/150/180 11,300 40/58/69 320/130/240 3.0 / 6.7 5.5 / 10.4 6/90/B14 1.1 / 2.65 - 71 14 172

ACA-LN10S M 100/150/180 16,500 40/58/69 320/130/240 3.0 / 6.7 5.5 / 10.4 4/100/B14 3.0 / 6.0 - 77 14 172

ACAF-LN10L M 100/150/180 11,300 40/58/69 320/130/240 3.0 / 6.7 5.5 / 10.4 6/90/B14 1.1 / 2.65 LPF280 71 14 180

ACAF-LN10S M 100/150/180 16,500 40/58/69 320/130/240 3.0 / 6.7 5.5 / 10.4 4/100/B14 3.0 / 6.0 LPF280 77 14 180

ACA-LN11L M 100/150/180 17,400 40/58/69 320/130/240 3.0 / 6.7 5.5 / 10.4 6/112/B14 2.2 / 4.6 - 75 18 212

ACA-LN11S M 100/150/180 23,600 40/58/69 320/130/240 3.0 / 6.7 5.5 / 10.4 4/112/B14 4.0 / 7.7 - 81 18 212

ACAF-LN11L M 100/150/180 17,400 40/58/69 320/130/240 3.0 / 6.7 5.5 / 10.4 6/112/B14 2.2 / 4.6 LPF280 75 18 220

ACAF-LN11S M 100/150/180 23,600 40/58/69 320/130/240 3.0 / 6.7 5.5 / 10.4 4/112/B14 4.0 / 7.7 LPF280 81 18 220

VERSION C: 60 Hz

ACA-LN8L M 120/180/215 6,150 40/58/69 320/130/240 3.0 / 6.7 5.5 / 10.4 6/90/B14 0.9 / 2.0 - 71 6 102

ACA-LN8S M 120/180/215 8,700 40/58/69 320/130/240 3.0 / 6.7 5.5 / 10.4 4/90/B14 1.8 / 3.3 - 83 6 102

ACAF-LN8L M 120/180/215 6,150 40/58/69 320/130/240 3.0 / 6.7 5.5 / 10.4 6/90/B14 0.9 / 2.0 LPF280 71 6 110

ACAF-LN8S M 120/180/215 8,700 40/58/69 320/130/240 3.0 / 6.7 5.5 / 10.4 4/90/B14 1.8 / 3.3 LPF280 83 6 110

ACA-LN9L M 120/180/215 7,500 40/58/69 320/130/240 3.0 / 6.7 5.5 / 10.4 6/90/B14 0.9 / 2.0 - 70 11 132

ACA-LN9S M 120/180/215 10,900 40/58/69 320/130/240 3.0 / 6.7 5.5 / 10.4 4/90/B14 1.8 / 3.3 - 83 11 132

ACAF-LN9L M 120/180/215 7,500 40/58/69 320/130/240 3.0 / 6.7 5.5 / 10.4 6/90/B14 0.9 / 2.0 LPF280 70 11 140

ACAF-LN9S M 120/180/215 10,900 40/58/69 320/130/240 3.0 / 6.7 5.5 / 10.4 4/90/B14 1.8 / 3.3 LPF280 83 11 140

ACA-LN10L M 120/180/215 12,000 40/58/69 320/130/240 3.0 / 6.7 5.5 / 10.4 6/90/B14 1.3 / 2.7 - 74 14 172

ACA-LN10S M 120/180/215 16,400 40/58/69 320/130/240 3.0 / 6.7 5.5 / 10.4 4/100/B14 3.6 / 7.2 - 80 14 172

ACAF-LN10L M 120/180/215 12,000 40/58/69 320/130/240 3.0 / 6.7 5.5 / 10.4 6/90/B14 1.3 / 2.7 LPF280 74 14 180

ACAF-LN10S M 120/180/215 16,400 40/58/69 320/130/240 3.0 / 6.7 5.5 / 10.4 4/100/B14 3.6 / 7.2 LPF280 80 14 180

ACA-LN11L M 120/180/215 18,300 40/58/69 320/130/240 3.0 / 6.7 5.5 / 10.4 6/112/B14 2.6 / 4.6 - 78 18 212

ACA-LN11S M 120/180/215 23,600 40/58/69 320/130/240 3.0 / 6.7 5.5 / 10.4 4/112/B14 4.8 / 8.0 - 84 18 212

ACAF-LN11L M 120/180/215 18,300 40/58/69 320/130/240 3.0 / 6.7 5.5 / 10.4 6/112/B14 2.6 / 4.6 LPF280 78 18 220

ACAF-LN11S M 120/180/215 23,600 40/58/69 320/130/240 3.0 / 6.7 5.5 / 10.4 4/112/B14 4.8 / 8.0 LPF280 84 18 2201) Medium: F = mineral oil or water-glycol, M = mineral oil2) Depends on pump displacement3) Current requirement: B version at 400 V – 50 Hz / C version at 480 V – 60 Hz4) Fluid in cooling element5) Unfilled

Cooling in bypass flow: ACA-LN / ACAF-LNThe ACA-LN with integrated boost pump is a complete bypass flow cooling system; the ACAF-LN is equipped with a high-quality HYDAC filter for additional filtration.Advantages:

l Stable cooling and filtration (independent of the cycle times of the system) l Continuous filtration is possible, cooling as required l Avoidance of pressure surges in the cooling element l Design of the cooler is in accordance with the cooling capacity required (not according to the maximum possible return flow volume)

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Cooling Capacity and Pressure Difference ΔpMineral oil

AC-LN / ACA-LN / ACAF-LN50 Hz / 60 Hz

Pressure difference Δp

280

260

240

220

200

180

160

140

120

100

80

60

40

20

0

2.75

2.50

2.25

2.00

1.75

1.50

1.25

1.00

0.75

0.50

0.25

0.00

7.0

6.5

6.0

5.5

5.0

4.5

4.0

3.5

3.0

2.5

2.0

1.5

1.0

0.5

0.00 60 120 180 240 300 360 420 480 540 600 660 720 780 840 900 960

0 60 120 180 240 300 360 420 480 540 600 660 720 780 840 900 960

14S

14L12S

12L

11S

11L

10L9S

8L8S / 9L

10S

Oil flow [l/min]

Oil Flow [l/min]

Hea

t dis

sipa

tion

[kW

] at Δ

T =

40 °C

Pr

essu

re d

rop

[bar

]

Spec

ific

heat

dis

sipa

tion

[kW

/K]

Tolerance: ± 5 %

Measured at 30 mm²/sTolerance: ± 5 %

10L-S

8L-S

9L-S

14L-S

12L-S

11L-S

For other viscosities, the pressure loss must be multiplied by the conversion factor K:

Viscosity (mm²/s) 10 15 22 30 46 68 100 150Factor K 0.35 0.5 0.75 1 1.4 1.9 2.5 3.5

Cooling capacity:Dependent on the oil flow rate and the temperature difference ΔT between oil inlet and air inlet.

Note: The values are measured at ΔT = 40 °C. For smaller ΔT values, the values can change. You can also use our cooler calculation software for designing. Please contact our technical sales department.

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Cooling Capacity and Pressure Difference ΔpWater-glycol (60/40)

AC-LN50 Hz / 60 Hz

Pressure difference Δp

2702552402252101951801651501351201059075604530150

9.0

8.5

8.0

7.5

7.0

6.5

6.0

5.5

4.0

4.5

3.0

2.5

2.0

1.5

1.00 60 120 180 240 300 360 420 480 540 600 660 720 780 840 900 960

0 60 120 180 240 300 360 420 480 540 600 660 720 780 840 900 960

Water-Glycol Flow [l/min]

Water-Glycol Flow [l/min]

Hea

t dis

sipa

tion

[kW

] at Δ

T =

30 °C

Pr

essu

re d

rop

[mba

r]

Spec

ific

heat

dis

sipa

tion

[kW

/K]

Tolerance: ± 5 %

Measured at 2 mm²/sTolerance: ± 5 %

14S

14L

12S

12L

11S

8L8S / 9L

9S10L

10S11L

11L-S10L-S

12L-S

14L-S

9L-S

Cooling capacity:Dependant on the water-glycol flow rate and the temperature difference ΔT between w/g inlet and air inlet.

Note: The values are measured at ΔT = 30 °C. For smaller ΔT values, the values can change. You can also use our cooler calculation software for designing. Please contact our technical sales department.

8L-S

900

800

700

600

500

400

300

200

100

0

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8

Model Typ ACAF - LN8S - 40 - 1.0 - B - M - B - LPF280 - 10 - 1 - IBT

Cooler typeAC-LN = Air cooler (oil / water-glycol mix) ACA-LN = Air cooler (oil) with integrated pump ACAF-LN = Air cooler (oil) with integrated pump and filter

Size / motor speed8-14 = Size L = 6 poles (1,000 rpm) S = 4 poles (1,500 rpm)

Displacement cm3/rev40 / 58 / 69 (only ACA-LN / ACAF-LN 8-11)

Revision

Clogging indicators (only ACAF-LN)A = Without clogging indicator B = With visual indicator (Standard) D = With electrical and optical indicator (24 V)

FluidsF = Mineral oil or water glycol mix (AC-LN) M = Mineral oil (ACA-LN and ACAF-LN)

Motor voltageStandard voltages and frequencies for 3 phase motor B = 230/400 V – 50 Hz C = 276/480 V – 60 Hz A = Special version 230/400 V – 50 Hz + 276/480 V – 60 Hz (tolerance voltage ± 10 %) Other voltages on request

Size of filter (only ACAF-LN)ACAF-LN8-11 = LPF280

Filtration rating in micron (only ACAF-LN)5 = 5 μm Betamicron®-4-N (5 BN4HC) 10 = 10 μm Betamicron®-4-N (10 BN4HC) (standard) 20 = 20 μm Betamicron®-4-N (20 BN4HC)

Color1 = RAL 9002 (standard) Other colors on request.

AccessoriesIBP = Heat exchanger with integrated bypass valve IBT = Heat exchanger with integrated thermo-bypass valve AITF = Thermostat (fixed) For all possible accessories, like vibration absorber, air filter grid or air filter mat please refer to brochure Accessories for air coolers.

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DimensionsAC-LN 8-9-10-11

A ±10

B ± 25

C ±10

D1 ± 2

D2 ± 2

D3 ± 2

E1 ± 5

E2 ± 5

E3 ± 5

F ø Slots

Z1 Z2

AC-LN8 L 725 596 705 410 560 450 627 58 74 9x20 G1¼ʺ M22x1.5

AC-LN8 S 725 626 705 410 560 450 627 58 74 9x20 G1¼ʺ M22x1.5

AC-LN9 L 880 750 790 750 700 790 757 76.5 148 12 G1½ʺ M22x1.5

AC-LN9 S 880 780 790 750 700 790 757 76.5 148 12 G1½ʺ M22x1.5

AC-LN10 L 1,030 766 930 750 700 790 907 76.5 147 12 G1½ʺ M22x1.5

AC-LN10 S 1,030 787 930 750 700 790 907 76.5 147 12 G1½ʺ M22x1.5

AC-LN11 L 1,180 811 1,050 750 700 790 1,057 76.5 147 12 G1½ʺ M22x1.5

AC-LN11 S 1,180 810 1,050 750 700 790 1,057 76.5 147 12 G1½ʺ M22x1.5

AC-LN12 L 2,130 718 1,000 750 760 870 907 1,075 - 13x30 SAE2ʺ M22x1.5

AC-LN12 S 2,130 738 1,000 750 760 870 907 1,075 - 13x30 SAE2ʺ M22x1.5

AC-LN14 L 2,297 763 1,140 750 900 870 1,057 1,166 - 13x30 SAE2ʺ M22x1.5

AC-LN14 S 2,297 761 1,140 750 900 870 1,057 1,166 - 13x30 SAE2ʺ M22x1.5

A/2

B

D3

E1

C

D2 D1

D3

D1 C

D2

A/4

B

A/4

E3

E2

E1

E2

A

A

Z3

Z1 (3x)

Z3 (4x)Z1 (2x)

PLUG

PLUG

PLUG

(4x) Slots F

Air

Air

Air

A/2

AC-LN 12-14

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DimensionsACA-LN 8-9-10-11

A ±10

B ± 25

C ±10

C1 ± 25

D1 ± 2

D2 ± 2

D3 ± 2

D4 ± 2

E1 ± 5

E2 ± 5

E3 ± 5

F Ø Slots

Z1 (IN)

Z2 (3x)

Z3

ACA-LN8L 760 596 705 837 830 560 870 560 627 94 74 9x20 G2ʺ G1 1/4ʺ M22x1.5

ACA-LN8S 760 626 705 837 830 560 870 560 627 94 74 9x20 G2ʺ G1 1/4ʺ M22x1.5

ACA-LN9L 905 730 790 914 830 700 870 560 757 102 128 9x20 G2ʺ G1 1/2ʺ M22x1.5

ACA-LN9S 905 760 790 914 830 700 870 560 757 102 128 9x20 G2ʺ G1 1/2ʺ M22x1.5

ACA-LN10L 1,055 746 930 1,053 830 700 870 560 907 102 127 9x20 G2ʺ G1 1/2ʺ M22x1.5

ACA-LN10S 1,055 767 930 1,053 830 700 870 560 907 102 127 9x20 G2ʺ G1 1/2ʺ M22x1.5

ACA-LN11L 1,205 791 1,050 1,164 830 700 870 560 1,057 102 127 9x20 G2ʺ G1 1/2ʺ M22x1.5

ACA-LN11S 1,205 790 1,050 1,164 830 700 870 560 1,057 102 127 9x20 G2ʺ G1 1/2ʺ M22x1.5

ACAF-LN8L 760 596 705 846 830 560 870 560 627 94 74 9x20 G2ʺ G1 1/4ʺ M22x1.5

ACAF-LN8S 760 626 705 846 830 560 870 560 627 94 74 9x20 G2ʺ G1 1/4ʺ M22x1.5

ACAF-LN9L 905 730 790 929 830 700 870 560 757 102 128 9x20 G2ʺ G1 1/2ʺ M22x1.5

ACAF-LN9S 905 760 790 929 830 700 870 560 757 102 128 9x20 G2ʺ G1 1/2ʺ M22x1.5

ACAF-LN10L 1,055 746 930 1068 830 700 870 560 907 102 127 9x20 G2ʺ G1 1/2ʺ M22x1.5

ACAF-LN10S 1,055 767 930 1,068 830 700 780 560 907 102 127 9x20 G2ʺ G1 1/2ʺ M22x1.5

ACAF-LN11L 1,205 791 1,050 1,193 830 700 870 560 1,057 102 127 9x20 G2ʺ G1 1/2ʺ M22x1.5

ACAF-LN11S 1,205 790 1,050 1,193 830 700 870 560 1,057 102 127 9x20 G2ʺ G1 1/2ʺ M22x1.5

ACAF-LN 8-9-10-11A/2

A/2

B

B

D3

D3

D1

D1

D4

D4

C

C

D2

D2

C1

C1

E3

E3

E2

E2

E1

E1

AA

Z3

Z3

Z2 (OUT)

Z2 (OUT)

Z1 (IN)

Z1 (IN)

PLUG

PLUG

(6x) Slots F

(6x) Slots F

Air

Air

A/2

A/2

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Note:We recommend maintaining a minimum distance to ensure an unimpeded air inlet and air outlet. For sizes 8-11 this is half the height of the cooling element (A/2); for sizes 12-14 it is a quarter of the element height (A/4). Anything below the minimum distance can influence the cooling capacity and the noise emissions.

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NoteThe information in this brochure relates to the operating conditions and applications described.For applications and operating conditions not described, please contact the relevant technical department.Subject to technical modifications.

Industriegebiet 66280 Sulzbach/Saar Germany

Tel.: +49 6897 509-01 Fax: +49 6897 509-454

E-mail: [email protected] Internet: www.hydac.com

Via Sceresa, Zona Industriale 3 6805 Mezzovico Switzerland

Tel.: +41 91 9355-700 Fax: +41 91 9355-701

E-mail: [email protected] Internet: www.hydac.com

HYDAC COOLING GMBH

HYDAC AG Mezzovico Branch

Kühlsysteme Cooling SystemsOSCA / OSCAF.

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Globale Präsenz.Lokale Kompetenz.www.hydac.com

Head Office Industriegebiet HYDAC INTERNATIONAL 66280 Sulzbach/Saar GMBH Germany

Phone: +49 6897 509-01 Fax: +49 6897 509-577

E-Mail: [email protected] Internet: www.hydac.com

HYDAC StammhausHYDAC GesellschaftenHYDAC Vertriebs- und Servicepartner

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Die OSCA / OSCAF-Baureihe stellt eine Weiter- entwicklung und Optimierung der SCA / SCAF-Baureihe dar und bietet mehr Leistung bei einer geringeren Geräuschemission in einer kompakteren Bauform.Das OSCA-Modell mit integrierter Förderpumpe ermöglicht eine effiziente Kühlung der Hydraulik-flüssigkeit im Nebenstrom. Für eine zusätzliche Filtration ist in die OSCAF-Version ein Filter mit Durchströmung von innen nach außen in den Wärmetauscher integriert. Die Anwendung als Nebenstromkühl- und Filtersystem hat den Vorteil, dass Kühlung und Filtration unabhängig von den Taktzeiten des Hydrauliksystems gewährleistet sind. So kann der Kühler auf die optimale Kühlleistung anstatt den maximalen Rücklauf ausgelegt werden.Des Weiteren werden beim Betrieb im Nebenstrom Schwankungen der Fördermenge und dadurch auch Druckstöße im Wärmetauscher vermieden, die den Kühler beschädigen könnten.

The OSCA / OSCAF series is a development and optimization of the SCA / SCAF series and offers more performances with a reduced noise level in a more compact design.

The OSCA version with integrated oil circulation pump allows the cooler to create an off-line cooling system that can also provide high quality filtration if required with the OSCAF model having the latest high filter dirt holding capacity IN to OUT technology integrated into the heat exchanger.

Off-line cooling system includes: stable cooling (and filtration) performance irrespective of variations in flow and duty for the main hydraulic circuit. This allows the cooler to be sized to suit the heat load and not the maximum return line flow of the main circuit. A further advantage is that the off-line cooler is completely isolated from surge pressures.

OSCA - OSCAF Öl-Luft-Kühler.OSCA - OSCAF Oil-Air-Coolers.

Verfügbare Modelle / Available Models:

P/N: 3396455 - OSCA 2L/28/1.0/M/A P/N: 3448897 - OSCA 2S/28/1.0/M/A

Verfügbare Modelle / Available Models:

P/N: 3401717 - OSCAF 2L/28/1.0/B/M/A/NG080/4/A P/N: 3448899 - OSCAF 2S/28/1.0/B/M/A/NG080/4/A

Pre

ssur

e d

rop

[bar

] at

30 m

m 2/s

Oil flow [l/min]

Siehe Tabelle Seite 3: Korrekturfaktor K für andere Viskositäten / Correction factor K for other viscosities.

Tolerance: +/- 5 %

4,0

3,6

3,2

2,8

2,4

2,0

1,6

1,2

0,8

0,4

0,00 20 40 60 80 100 120

Hea

t d

isss

ipat

ion

at D

T=

40

° C

[kW

]

Oil flow [l/min ]

Sp

ecifi

c he

at d

isss

ipat

ion

[kW

/ °C

]*

Tolerance: +/- 5 %

0 20 40 60 80 100 120

12

10

8

6

4

2

0

0,3

0,275

0,25

0,225

0,2

0,175

0,15

0,125

0,1

0,075

0,05

0,025

0

OSCA 2L

OSCA 2S OSCAF 2 L, S

OSCA 2 L, S

A1

+/- 10

A2

+/- 10

B

+/- 10

C1

+/- 10

C2

+/- 10

D1

+/- 2

D2

+/- 2

D3

+/- 2

E1

+/- 2

E2

+/- 2

E3

+/- 2

øF W1

Min. *

W2

Min. *

Z1 Z2

OSCA 2 L, S 433 – 758 449 – 455 373 521 288 83 37.5 9 1000 300 G1„ G3/4„

OSCAF 2 L, S 454 434 758 449 561 455 373 521 288 83 37.5 9 1000 300 G1„ G3/4„

3

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Anwendung bei kleinen oder mittleren Hydrauliksystemen:Schmiersysteme Werkzeugmaschinen Industriepressen Hydraulische Aggregate Hydraulische Aufzüge

Geräuscharm:Halbierung der wahrgenommenen Lautstärke im Vergleich zur SCA / SCAF-Baureihe < 60 dB(A) bei 1 m Abstand (OSCA / OSCAF 2L)Verwendung einer geräuscharmen Pumpe sowie eines Radialgebläses mit Luftstrom-optimiertem Gehäuse (mit Hilfe von CFD-Software)

Kompakt:25 % geringeres Volumen und 20 % geringeres Gewicht im Vergleich zur SCA / SCAF-Baureihe Leichte Montage von Abluftkanälen aufgrund des Radialgebläses

Effizient:10 bis 15 % höhere Kühlleistung (kW). Integration mehrerer Funktionen: Pumpen, Kühlen und Filtrieren. Weniger Verrohrung und frei von Leckage: Der Filter mit Durchströmung von innen nach außen ist in den Wärmetauscher eingebaut und standardmäßig mit einem 2,5 bar Druckbypass und magnetischem Partikelabscheider ausgestattet.Einfache und schnelle Wartung: Zum Filterwechsel wird nur eine Verschlusskappe abgeschraubt.

Applications for all Small and Medium Size Hydraulic Cooling Systems: Lubrication Systems Machine Tools Industrial Presses Hydraulic Packing Systems Hydraulic Lifts

Silent:Half of the perceptible noise compared to the SCA / SCAF coolers: < 60 dB(A) at 1 m distance (OSCA / OSCAF 2L)

With: compact low noise special pump, centrifugal fan and fan duct design optimized with CFD Software (Computational Fluid Dynamics)

Compact:25 % less 3D volume and 20 % less weight compared to the SCA / SCAF series

Easy to duct, air connection with their unique vertical air flow to discharge air

Efficient:More value for money: 10 to 15 % more cooling power (kW) for the same money (€). Due to the integration of several functions: Pumping, Cooling, Filtering. Pipe less and leakage free: The filtration process is integrated into the heat exchanger tank with the status of the art IN to OUT filtration technology. The standard filter is equipped with integrated 2.5 bar bypass and magnetic particle trap (no more problem due to contamination). Easy and fast filter’s maintenance: only one screw-cap to be removed.

Viskosität / Viscosity (mm 2/s) 10 15 22 32 46 68 100 150

Faktor / Factor K 0,35 0,5 0,75 1 1,4 1,9 2,5 3,5

Korrekturfaktor K für andere Viskositäten: Correction factor K for other viscosities:

** Unter Öltankniveau ** Below oil tank level

OSCA 2L 28 28 6/80 0,75 60/64 10 90 500 - 39

OSCA 2S 28 40 4/90 1,10 69/73 10 90 500 - 40

OSCAF 2L 28 28 6/80 0,75 60/64 10 90 500 GS080 42

OSCAF 2S 28 40 4/80 1,10 69/73 10 90 500 GS080 43

Küh

lerm

od

ell

Typ

e of

coo

ler

Pum

pen

förd

erm

eng

eD

isp

lace

men

t [c

cm ³

/U]

Öld

urch

flus

sO

il flo

w [l

/min

] [4

0 cS

t -

4 b

ar]

Po

lzah

l des

Mo

tors

/

Bau

grö

ße

N°

of p

oles

/ s

ize

Mo

torl

eist

ung

Mot

or c

apac

ity [k

W]

Sch

allp

egel

bei

1 m

A

bst

and

bei

50

/ 60

Hz

Noi

se le

vel a

t 1m

dis

tanc

e at

50

/ 60

Hz

[dB

(A)]

Max

. Bet

rieb

sdru

ck

Max

. op

erat

ive

pre

ssur

e [b

ar] *

*

Max

. Ölt

emp

erat

urM

ax. o

il te

mp

erat

ure

[°C

]

Max

. Vis

kosi

tät

Max

. vis

kosi

ty [m

m²/

s] *

*

Filt

erg

röß

eS

ize

of fi

lter

[-]

Gew

icht

W

eigh

t [k

g]

Kühlsysteme Cooling SystemsOSCA / OSCAF.

DE

5.8

11.1

/05.

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DE

5.8

11.1

/05.

10

Globale Präsenz.Lokale Kompetenz.www.hydac.com

Head Office Industriegebiet HYDAC INTERNATIONAL 66280 Sulzbach/Saar GMBH Germany

Phone: +49 6897 509-01 Fax: +49 6897 509-577

E-Mail: [email protected] Internet: www.hydac.com

HYDAC StammhausHYDAC GesellschaftenHYDAC Vertriebs- und Servicepartner

Pro

spek

t: K

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me

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5.7

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Pro

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F 7.

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.: S

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EF 3

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Documents

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