3-way Proportional pressure reducing valve, pilot operated · – Linear command value/pressure characteristic curve – Integrated electronics (OBE) with type 3DRE(M)E: • Low manufacturing

0757

–Pilotoperatedvalveforreducingapressure(PtoA)andlimiting(AtoT)asystempressure–Actuationbyproportionalsolenoid–Maximumpressurerelieffunction,optional–Valveandcontrolelectronicsfromasinglesource–Controlelectronicsfortype3DRE(M):•AnalogueamplifiertypeVT-VSPA1(K)-1inEuro-cardformat•DigitalamplifiertypeVT-VSPD-1inEuro-cardformat•AnalogueamplifiertypeVT11131ofmodulardesign–Linearcommandvalue/pressurecharacteristiccurve–Integratedelectronics(OBE)withtype3DRE(M)E:•Lowmanufacturingtoleranceofthecommandvalue/pressurecharacteristiccurve•Ramptimescanbeadjustedseparatelyforpressurebuild-up

01/12

FeaturesContents

Type 3DRE(M) and 3DRE(M)E

3-way Proportional pressure reducing valve,pilot operated

6.6

ComponentseriesL6XNG10and16Maxpressure315barMaxflow:125L/min(size10)300L/min(size16)

Functionandconfiguration 02Symbols 03Orderingcode 03Technicaldata 04-05Electricalconnections,plug-inconnectors 06Integratedelectronics(OBE)ofTypesDREEandDREME 07-08Characteristiccurves 09Unitdimensions 10-11Pilotoilsupply 12

0758

06

Hengli hydraulic ｜ Hydraulic components

1

2

3

4

56

7

8

9 10

11

12

13B

X T A B T Y

A

14

15

1617

A

X YP T

A

X YP T

A

YP T

A

YP T

A

X YP T

A

X YP T

A

YP T

A

YP T

3DRE…Y… 3DREM…Y… 3DRE…XY… 3DREM…XY…

3DREE…Y… 3DREME…Y… 3DREE…XY… 3DREME…XY…

To the amplifier To the amplifier

PEA1 2

PEB1 2

PEA1 2

PEB1 2

73.5

Φ28

.5

Φ6.5~Φ11

AB

CD E

F

Valvesoftypes3DRE(M)and3DRE(M)Eareelectricallypilotoperated3-waypressurereducingvalveswithpres-surerelieffunctionfortheactuator.Theyareusedtoreduceasystempressure.

Technical structure:Thevalvesconsistofthreemainassemblies:1)Pilotvalve(1)optionallywithmaximumpressurerelieffunction(16)2)Proportionalsolenoid(2)3)Mainvalve(3)withmainspool(4)

Function and configuration

Function:Generalfunction:Commandvalue-relatedadjustmentofthepressuretobereducedinchannelAbyproportionalsolenoid(2).WhennopressureisappliedinportP,mainspool (4) isheldbysprings (5)and(6) inthecentralposition.Here,theconnectionsfromPtoAandAtoTareclosed.Pilotoilflowsfrombore(7)viaflowcontroller(8),pilotvalve(1)toorifice(9),throttlinggap(10),pipe(11)toportY.Thisportmustbeconnectedatzeropressuretothetank.

Pressure reduction:Build-upofpilotpressureincontrolchamber(12)asafunctionofthecommandvalue.Pressureisbuiltupinspringchamber(14)viaorifice(13)andthemainspool isshiftedtotheright.HydraulicfluidflowsfromPtoA.TheactuatorpressureinportAisappliedtospringchamber(15).An increase in thepressure in port A to thepressuresetonpilotvalve(1)causesmainspool(4)tobepushedtotheleft.ThepressureinportAbecomesvirtuallythesameasthepressuresetonpilotvalve(1).

Pressure relief function:WhenthepressureinportAexceedsthepressuresetonpilotvalve (1),mainspool (4) isshiftedfurther to the left.Thiscauses theconnectionfromA toT toopenand limits thepressureappliedinportAtothesetcommandvalue.

Type 3DREM:Thevalveisoptionallyavailablewithanadditionalspring-loaded pilot valve (16) to provide amaximumpressurerelieffunction.

Types 3DREE and 3DREME –withintegratedelectro-nics(OBE):Intermsoffunctionandstructure,thesevalvescorrespondtotypes3DREand3DREM,exceptfortheintegratedelectronics.Theelectronicsreceivesthesupplyandcommandvaluevoltageviacablesocket.Thecommandvalue/pressurecharacteristiccurve(zeropointonspindle(17)andthegradientareadjustedinthefactorywithnarrowtolerancesontheImaxpotentiometerintheelectronics.Theramptimeforpressurebuild-upandpressurereductioncanbeadjustedindependentlyofeachotherwiththehelpoftwopotentiometers.

Type 3DREM10P-L6X/...G24K4V

02 Proportional pressure valves ｜ Type 3DRE(M) and 3DRE(M)E/12

Hydraulic components ｜ Hengli hydraulic

0759

06

Symbols

1

2

3

4

56

7

8

9 10

11

12

13B

X T A B T Y

A

14

15

1617

A

X YP T

A

X YP T

A

YP T

A

YP T

A

X YP T

A

X YP T

A

YP T

A

YP T




PEA1 2

PEB1 2

PEA1 2

PEB1 2

73.5

Φ28

.5

Φ6.5~Φ11

AB

CD E

F

03Proportional pressure valves ｜ Type 3DRE(M) and 3DRE(M)E /12

Ordering code

/ /3DRE G24 VP L6X *-

Withoutmaximumpressurerelieffunction=NocodeWithmaximumpressurerelieffunction=M

Forexternalcontrolelectronics=NocodeWithintegratedelectronics(OBE)=E

Size10=10Size16=16

Subplatemounting=P

Componentseries60to69=L6X(60to69:unchangedinstallationandconnectiondimensions)

Pressurestage50bar=50100bar=100200bar=200250bar(size16only)=250315bar(size10only)=315

Furtherdetailsincleartext

V=FKMseals,suitableforphosphateester(HFD-R)Nocode=NBRseals

Supply voltage for control electronicsG24=24VDC

Pilot oil supply and pilot oil drainY=Pilotoilsupplyinternal,

pilotoildrainexternalXY=Pilotoilsupplyexternal,

pilotoildrainexternal

Fortype3DRE(M):K4=Withoutplug-inconnectorZ4=Withplug-inconnector

Fortype3DRE(M)E:K31=Withoutplug-inconnectorZ31=Withplug-inconnector

Fortype3DRE(M):A1=Command/actualvalue0to10VF1=Command/actualvalue4to20mA

0760

06


Technical data

GeneralSize 10 16

Weight3DREand3DREM kg 7.7 10.23DREEand3DREME kg 7.8 10.3

Installationorientation Optional,preferablyhorizontalStoragetemperaturerange -20to+80Ambienttemperaturerange

3DREand3DREM -20to+70

3DREEand3DREME -20to+50

Hydraulic (measuredwithHLP46；ϑoil=40±5andp=100bar)Size 10 16

Max.operatingpressure

PortsP,AandX bar 315 PandX=315；A=250PortY bar separatelyandatzeropressuretotank

Max.setpressureinchannelA

Pressurestage50bar bar 50 50Pressurestage100bar bar 100 100Pressurestage200bar bar 200 200Pressurestage250bar bar 250Pressurestage315bar bar 315

Min.setpressurechannelAatzerocommandvalue seecharacteristiccurves

Maximumpressurerelieffunction(infinitelyadjustable)

Pressurestage50bar bar

Pressureadjustmentrange

30to70

Factorsetting

to70barPressurestage100bar bar 50to130 to130barPressurestage200bar bar 90to230 to230barPressurestage250bar bar 100to250 to250barPressurestage315bar(size10only) bar 150to350 to350bar

Max.permissibleflow L/min 125 300Pilotoilflow L/min 1

Hydraulicfluid Mineraloil(HL,HLP)toDIN51524;furtherhydraulicfluidsonenquiry!

Hydraulicfluidtemperaturerange -20to+70Viscosityrange mm2/s 20to380

Degreeofcontamination Maximumpermissibledegreeoffluidcontamination:Class9.NAS1638or20/18/15,ISO4406

Hysteresis % ±2ofmax.setpressureRepeatability % <±2ofmax.setpressureLinearity % ±3.5ofmax.setpressureManufacturingtoleranceofcommandvalue/pressurechar.curve,referredtohysteresiscurve,increasingpressure

3DREand3DREM % ±2.5ofmax.setpressure

3DREEand3DREME % ±1.5ofmax.setpressure

Switchingtime ms 100to200(dependingonsystem)



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Technical data

Electrical Supplyvoltage V 24VDCMin.controlcurrent mA 100

Max.controlcurrent

3DREand3DREM mA 16003DREEand3DREME mA 1440to1760

Solenoidcoilresistance

Coldvalueat20° C Ω 5.4Max.hotvalue Ω 7.8

Dutycycle % 100

Electricalconnection

3DREand3DREM WithcomponentplugtoDINEN175301-803CablesockettoDINEN175301-803

3DREEand3DREME WithcomponentplugtoEDINEN175201-804CablesockettoDINEN175201-804

TypeofprotectionofthevalvetoEN60529 Ip65withcablesocketmountedandlocked

Control electronicsIntegratedelectronics(OBE)withtypes3DREEand3DREME Integratedinthevalve

Externalcontrolelectronicsfortypes3DREand3DREM

AmplifierinEuro-cardformat

analogue VT-VSPA1(K)-1digital VT-VSPD-1

Amplifierofmodulardesign analogue VT11131


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· For type 3DRE(M)E (with integrated electronics (OBE))

· For type 3DRE(M) ( (without integrated electronics))

Forpinallocationalsoseeblockcircuitdiagram.Plug-inconnectortoDINEN175201-804

1

2

3

4

56

7

8

9 10

11

12

13B

X T A B T Y

A

14

15

1617

A

X YP T

A

X YP T

A

YP T

A

YP T

A

X YP T

A

X YP T

A

YP T

A

YP T




PEA1 2

PEB1 2

PEA1 2

PEB1 2

73.5

Φ28

.5

Φ6.5~Φ11

AB

CD E

F

Connections on the component plug:

CablesockettoDINEN175301-803orISO4400

Connections on theplug-in connector:

Electrical connections, plug-in connectors



0763

06

Block circuit diagram / pin assignment of integrated electronics

Function:TheintegratedelectronicsiscontrolledviathetwodifferentialamplifierconnectionsDandE.Therampgeneratorgeneratesfromacommandvaluestepchange(0to10Vor10to0V)adelayedincreaseordropofthesolenoidcurrent.PotentiometerR14canbeusedtoadjusttherisetime,potentiometerR13toadjustthedroptimeofthesolenoidcurrent.Themaximumramptimeof5sisonlypossibleoverthefullcommandvaluerange.Inthecaseofminorchangesinthecommandvalue,theramptimeshortensaccordingly.Thecommandvalue/solenoidcurrentcharacteristiccurveisadjustedtothevalvebymeansofthecharacteristiccurvegeneratorsothatnon-linearitiesinthehydraulicsystemarecompensatedforandalinearcommandvalue/pressurecharacteristiccurveisobtained.

Thecurrentregulatorregulatesthesolenoidcurrentindependentlyofthesolenoidcoilresistance.PotentiometerR30canbeusedtochangethegradientofthecommandvalue/currentcharacteristiccurveandhencethegradientofthecommandvalue/pressurecharacteristiccurveoftheproportionalpressurecontrolvalve.PotentiometerR43servesforadjustingthebiasingcurrent.Thissettingshouldnotbechanged. Ifrequired,adjustthezeropointofthecommandvalue/pressurecharacteristiccurveonthevalveseat.Achopperamplifierformsthepowerstageoftheelectronicsforcontrollingtheproportionalvalve.Itispulsewidth-modulatedwithaclockfrequencyof300Hz.ThesolenoidcurrentcanbemeasuredatbothmeasuringsocketsMP1andMP2.Avoltagedropof0.352Vatthemeasuringresistorcorrespondstoasolenoidcurrentof1.6A.

Integrated electronics (OBE) of Types DREE and DREME

R30 R43

ImaxR 13+

0V

+U+7,5 V

-7,5 V

+

R 14

+U

=

=

I

D

E

FC

B

A

n.c.

IminU

U

300 Hz

=

MP1

MP2

n.c.

1,6A ≙0,352 V

0V

Command value0 to 10 V

Differential ampifier

Ramp generator

Char. curve generator Current regulator Chopper amplifier

0V referencepotential

Supply voltage:Ueff : 22 to 33V

Power supply

Ramp “up“

Ramp “down“

Oscillator

Measuring resistor R = 0.22 ΩInternal reference point

-

22

24

26

28

30

20 40 60 80 100

0,75 mm2

1 mm2

Supply cable length (m)

Min

. sup

ply

volta

ge (

V )

Size 10

Screw plug 1 for "XY"

Screw plug 1

P

X

T

Y

P

P X

T

Size 16

Solenoid

Main valve

Cover


0764

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Power supply unit with rectifier. Single-phase rectification or three-phase current bridge: Ueff=22to33VResidual ripple content on the power supply unit :<5%Output current:Ieff=max.1.4ASupply cable: –Recommended:5-wire,0.75or1mm2

withprotectiveconductorandshield–Outerdiameter6.5to11mm–Shieldto0Vsupplyvoltage–Max.permissiblelength100m

Theminimumsupplyvoltageofthepowersupplyunitdependsonthelengthofthesupplycable(seediagram).Inthecaseoflengths>50m,acapacitorof2200μmustbeprovidedinthesupplycableinthevicinityofvalve.

Integrated electronics (OBE) of Types DREE and DREME

R30 R43

ImaxR 13+

0V

+U+7,5 V

-7,5 V

+

R 14

+U

=

=

I

D

E

FC

B

A

n.c.

IminU

U

300 Hz

=

MP1

MP2

n.c.

1,6A ≙0,352 V

0V



Ramp generator




Power supply

Ramp “up“

Ramp “down“

Oscillator


-

22

24

26

28

30

20 40 60 80 100

0,75 mm2

1 mm2

Supply cable length (m)M

in. s

uppl

y vo

ltage

( V

)

Size 10


Screw plug 1

P

X

T

Y

P

P X

T

Size 16

Solenoid

Main valve

Cover

· Supply voltage



0765

06

Characteristic curves (measuredwithHLP46,ϑoi=40±5andp=100bar)

0

5

25 50 75 100 125

10152025

3540

30A→T

P→A

0 50 100 150 200 250

10

20

30

A→T

P→A

300

0 20 40 60 80 100

20

40

80

100

60

050

100150200250

100 0

300

255075125 25 50 75 100 125

A→T P→A

0300

50

100

150

200

250

200 100 0 100 200 300

A→T P→A

Pres

sure

diffe

rent

ial (b

ar)

Pres

sure

diffe

rent

ial (b

ar)

Pres

sure

diff

eren

tial (

bar)

Pres

sure

diff

eren

tial (

bar)

Flow ( l/min ) Flow ( l/min )

Pres

sure

in ch

anne

l A (

bar )

Pres

sure

in ch

anne

l A (

bar )

Pres

sure

in ch

anne

l A (

bar )

Size 10 Size 16

·Pressure in channel A -command value (measured at flow 0 L/min)Size 10 and 16

Command value ( % )

·Pressure in channel A ‒ flowSize 10 Size 16



0100 75 50 25 0 25125 40

10

20

30

40

A→T P→A

0200 150 100 50 0 50250 80

10

20

30

40

300

A→T P→A

·Min. set pressure ‒ flowSize 10 Size 16


0766

06


54

5461.9

6.3 11.1

21.4 32

.5 46

7.9

50.837.327

16.73.2

25.5

X

Y

P

P

B A

T

X YBA

T T

70 44 46

1

2

4519

6

3

428

156

8635

56

31 105

A P B

21231

7 9

8

61.9

Required surface quality of mouting face

0.01/100mm0.8

Unit dimensions (nominaldimensionsinmm)

Size 10

1Mainvalve2Pilotvalve3Proportionalsolenoid4Maximumpressurerelieffunction(Type3DREM...)5IdenticalsealringsforportsA,B,P,T(R-ring13×1.6×2),6IdenticalsealringsforportsXandY(11.18×1.6×1.78),7Machinedmountingface,positionofportstoDIN24340A,ISO4401andCETOP-RP121H8Inthecaseof"internal"pilotoilsupply(versionY),portXonthesubplatemustbeplugged.9PortBonthesubplatemustbeplugged

Valve fixing screws: 4socketheadcapscrewsM6×45GB/T70.1-10.9;tighteningtorqueMA=15.5Nm



0767

06

1

2

3

4

206.

3

165.

596

34

53 154260

5 6

34

A

50101.6

45

161

B

XT P

Y

x

y

91.4

69.9

35

1.6

A

L

BY

XT P

7

8

988.1

1.5

12.7

35

19 18.334.1

5076.6

101.6

14.3

54 55.6

69.9

71.5

65.9

Required surface quality of mouting face

0.01/100mm0.8

Unit dimensions (nominaldimensionsinmm)

Size 16

Valve fixing screws: 4socketheadcapscrewsM10×60GB/T70.1-10.9；tighteningtorqueMA=73Nm2socketheadcapscrewsM6×55GB/T70.1-10.9；tighteningtorqueMA=15.5Nm

1Mainvalve2Pilotvalve3Proportionalsolenoid4Maximumpressurerelieffunction(Type3DREM...)5IdenticalsealringsforportsA,B,P,T(22.53×2.3×2.62),6IdenticalsealringsforportsXandY(10×2×2),7Machinedmountingface,positionofportstoDIN24340A,ISO4401andCETOP-RP121H8Inthecaseof"internal"pilotoilsupply(versionY),portXonthesubplatemustbeplugged.9PortsBandLonthesubplatemustbeplugged


0768

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Pilot oil supply

· Type 3DRE...-...XY Pilotoilsupplyexternal Pilotoildrainexternal

Withthisversion,thepilotoilissuppliedfromaseparatecontrolcircuit(external).ThepilotoildrainisnotdirectedtotheT-channelofthemainvalve,butfedseparatelytothetankviaportY(external).

· Type 3DRE...-.../...Y… Pilotoilsupplyinternal Pilotoildrainexternal

Withthisversion,thepilotoilissuppliedfromtheP-channelofthemainvalve(internal).ThepilotoildrainisnotdirectedtotheT-channelofthemainvalve,butfedseparatelytothetankviaportY(external).PortXonthesubplatemustbeplugged.

Pilotoilsupply external:1Closed internal:1Open

Pilotoildrain external

Pilotoilsupply external:1Closed internal:1Open

Pilotoildrain external

R30 R43

ImaxR 13+

0V

+U+7,5 V

-7,5 V

+

R 14

+U

=

=

I

D

E

FC

B

A

n.c.

IminU

U

300 Hz

=

MP1

MP2

n.c.

1,6A ≙0,352 V

0V



Ramp generator




Power supply

Ramp “up“

Ramp “down“

Oscillator


-

22

24

26

28

30

20 40 60 80 100

0,75 mm2

1 mm2

Supply cable length (m)

Min

. sup

ply

volta

ge (

V )

Size 10


Screw plug 1

P

X

T

Y

P

P X

T

Size 16

Solenoid

Main valve

Cover


Documents

3-way Proportional pressure reducing valve, pilot operated · – Linear command value/pressure characteristic curve – Integrated electronics (OBE) with type 3DRE(M)E: • Low manufacturing