1/14

RE 64 124/03.00

Replaces: 11.97

RE64 124/03.00

Sandwich type mobile control blocksType SM 18

250 bar/350 bar *) pump side300 bar/400 bar *) consumer side

*) High pressure type “H” on requestFeatures:

– Control blocks of sandwich design up to 10 directionalvalve sandwich plates in one control block, especiallyfavourable power density.

– Parallel, tandem or series circuits, combinations alsopossible.

– Small clearances between control spool and housing, thuslow internal leakage.

– Mechanical, hydraulic, electro-hydraulic actuation withnumerous detents and methods of spool return, two axescontrol on request.

– May be flanged together with sandwich elements typeSM 12.

– No leakage between the plates as the largest compressiveforce of the tie rods acts on the pressure channel zone.

– Above average fine controlability due to pression castingtechnology and precision manufacturing of the fine controlgrooves.

– Screwed-in pressure/anti-cavitation valve cartridges.

– Ports: Thread (metric, pipe thread, UNF)Tank port can be located in the input element (no changeof piping when assembling additional directional valveelements).

– Sandwich plates may be exchanged at any time.

Contents

Title Page

Functional description, section ............................................ 2

Technical data, charactoristic curves, circuit examples ...... 3

Ordering details ............................................................... 4, 5

Connection possibilities, symbols ....................................... 6

Inlet, intermediate and outlet elements ............................... 7

Primary and secondary valves ............................................ 8

Directional control valve elements ...................................... 9

Types of circuit .................................................................. 10

Spool variants, electro-hydraulic actuation ....................... 11

Unit dimensions .......................................................... 12, 13

Spool returns and actuator types ...................................... 13

Type SM 18 with three directional valve elements,mechanical operation

Up to 160 L/min

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The series SM 18 control blocks consist of variouscomponents.These are: – Input elements

– Directional valve elements– Intermediate elements

(adaptor, central elements)– Output elements

Input elements contain a supply port, a pressure gauge port,a tank port with or without plug, and optionally a connectionfor the installation of a primary pressure relief valve.Directional valve elements are available with various circuittypes, spool types and actuation possibilities.The directional valves are designed to the 6-way principleand consist of the housing (1), control spool (2), load holdingcheck valve (5), as well as actuation element (6), the return

element (3), optionally with detent in the switched position (4).In the neutral position the pump flow is passed at zeropressure to the tank via a bypass channel. If a control spool isoperated then the connection from the pump to the actuator isopened via the fine control grooves, whilst the bypass isthrottled via fine control grooves (negative overlap). If thepump pressure exceeds the actuator pressure then thepressure fluid starts to flow to the actuator via the checkvalve. With further movement of the control spool (2) thepump flow is incrasingly diverted from the bypass channel tothe actuator (fine control).The spool stroke is divided into three phases: 30% for overlap(no leakage in neutral position), 40% fine control range (flowand pressure), 30% for residual stroke (full opening). Due tothe fine control range of 40% of the spool stroke the actuatorcan be finely controlled.

Functional description, section

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RE 64 124/03.00

P → B2 or P → A2

Symbol 001(in 3 section block:element 2)

A2 → T or B2 → T

2 Elements

1 Element

Characteristic curves (measured at ν = 41 mm2/s and ϑ = 50 °C)

3 Elements

P → T bypasscirculation

Flow in L/minFlow in L/min

Pre

ssur

e di

ffere

ntia

l in

bar

Pre

ssur

e di

ffere

ntia

l in

bar

15

3

6

9

12

0 40 80 120 160 200

8

7

6

5

4

3

2

1

0 50 100 160 200

Control pressure: pst min 25 bar(for hydraulic pst max 30 baractuation) Control curve no. 06 for actuator type

H200, for suitable pilot control units seeRE 64 550, RE 64 551,RE 64 552, RE 64 555 and RE 64 558.

Operating force at lever R5: max 17 N 1)Operating force at spool: max 150 N 1)1) with standard springWeight:Input element with pressure relief valve 4.8 kgDirectional valve element 6 to 6.3 kgOutput element 2.1 kg

Pressure fluid: Mineral oil (HL, HLP) to DIN 51 524Pressure fluid temperature range: –20 to +80 °CViscosity range: 10 to 380 mm2/sMaximum permissible degree of contamination of thepressure fluid is to NAS 1638 class 9. We, therefore,recommend a filter with a minimum retention rate of ß

10 ≥ 75.

Flow: Up to 160 L/minOperating pressure: Medium pressure High pressure

(standard) (on request)Ports P, P2, P3, P4, M Up to 250 bar Up to 350 barPorts A, B Up to 300 bar Up to 400 barPorts T, T1, T2 Up to 20 bar Up to 20 bar

Note:With proportional or on/off electro-hydraulic operation the pilot oil drains are internal. The pressure in the return line should beas low as possible (max. 5 bar).

Technical data (for applications outside these parameters, please consult us)

Circuit example

P

M

T1

A B Ta

b

a a

A B BA

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Number of directional valve spools 1 to 10

Medium pressure (standard) = LHigh pressure (only on request) = HPressure data, see parameters on page 1

Series 10 to 19 (10 to 19: unchanged installationand connection dimensions) =1X

Inlet elementWith primary pressure relief valve, pilot operated = AV + pressure in barand pressure gauge portWith primary valve cavities, plugged = A–000and pressure gauge portWithout primary valve cavities = F–000With pressure gauge port

Without pilot coil supply unit = No codeWith pilot oil supply, external = X 2)

Directional valve elementParallel circuit = PTandem circuit = TSeries circuit = S

Symbols to DIN ISO 1219 Check valve Check valveWith Without With WithoutOrdering details Ordering details

= 001 = 005 = 004 –

= 011 = 009 = 010 –

For further spool variations, see note on page 6.

1) Ordering examples for control blocks with central element. Assembly from left to right:

12345678901234567890123451234567890123456789012345123456789012345678901234512345678901234567890123451234567890123456789012345

Directional valve elements

Further directional valve elementsOtlet or inlet elementsPorts, e.g. 01

Type of actuator Actuator on Actuator on Type of actuator"R5" connection side A connection side B "R5"

Ordering details

SM 18 L

1XSM 18 L

Z

Z

1X

1X

1X

SM 18 L

SM 18 L

SM 12-18 L

1XSM 18 L

1X

Sketch 4

Inlet element, separate

Central element SM 18 1)

Central element SM12–SM18 1)(for inlet element only the sequenceSM12-SM18 is possible)

Directional valve element, separate

Outlet element, separate

Complete control block

Central outlet

Act

uato

r po

rt A

A

ctua

tor

port

B

2nd axis

3rd axis, etc.

0 321

BA

P T

10 2 3 3 1

20

1 203

BA

P T

0

1 0

3

1 0 2

201

P T

A B

21

2

SM 18 (SM12-SM18) L 1X Outlet or inlet elements

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RE 64 124/03.00

Further details in clear textConnection threads

01 = Ports P, A, B, P3, P4 = G 3/4 ports T, T1 = G1Connection type 02 (metric) and 19 (UNF) on request

SealsM = NBR seals

Attention! The compatibility of the seals and pressure fluid has to be taken into accountWith central outlet element only with tank port T (type "R")

L = Transfer plate tank port T1 in inlet element, (see sketch 2 on page 3)R = Outlet element with tank port T, (see sketch 1 on page 3)C = Inlet element with tank port T1 and pressure port P3,

for subsequent actuators, (see sketch 1 on page 3)CR = Outlet element with tank port T and port P4,

for subsequent actuators, (see sketch 3 on page 3)Secondary valves

B + pressure in bar = pressure relief valve, pilot operatedE = anti-caviation valveH + pressure in bar = pressure/anti-cavitation valve, pilot operatedQ = plugM = secondary valve cavity

Control valves for eletro-hydraulic actuation "W200"34 = DRE 4 K 3X/30 G12–22 NM (12 Volt) to catalogue sheet RE 29 18132 = DRE 4 K 3X/30 G24–10 NM (24 Volt) to catalogue sheet RE 29 18114 = 3WE4 C 1X K/A G12N Z4 (12 Volt) to catalogue sheet RE 23 14012 = 3WE4 C 1X K/A G24N K4 (24 Volt) to catalogue sheet RE 23 140

Ordering details only when required.

Operator orientation– = Without mechanical/manual actuator (necessary with types "H200" and "W200")

Mechanical actuator - fork, tongueA = Mechanical actuator on connection side AB = Mechanical actuator on connection side B

Manual actuator - leverA = Manual actuator on connection side A – lever upB = Manual actuator on connection side B – lever upC = Manual actuator on connection side A – lever downD = Manual actuator on connection side B – lever downE = Manual actuator on connection side A – lever forwardF = Manual actuator on connection side B – lever forward

Type of operator. . R5 = Manual actuator, encapsulated lever (with gaiter), see sketch 4 on page 8. . G1 = Spool end with fork. . Z1 = Spool end with tongue

A2 . . = Spool with spring returnB2 . . = Spool with spring return and detent in spool position 2C2 . . = Spool with spring return and detent in spool position 1D2 . . = Spool with spring return and detent in spool positions 1, 2E2 . . = Spool with spring return and detent in spool position 3 (4th position)

H200 = Hydraulic actuator, spool with spring returnH400 = Hydraulic actuator, spool with spring return with 4 position spool type 004W200 = 2) Electro-hydraulic actuator, spool with spring return

01M

01 *M

01 *M

01 *M

01 *M

01 *M

*

2nd to 10th directionalvalve elements

2) With electro-hydraulic actuator external "X" control oil supply is required.

Seesketches1, 2 and 3on page 3

These details are not necessary when ordering acomplete mobile control block.They are used for the definition of different elements forindividual orders.

B A AB

F E

CD

!

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A

B

A

B

A

B

A

B

A

B

ToderP3

T

P4

P

M T1

P

M T1

P

M T1

Connection possibilities (P, P3, P4, T1 and T) at the inlet and outlet elementsVersion "L" Conversion plate tank port T1 in the inlet element

Version "R" Outlet element with tank port T

Version "C" Inlet element with tank port T and pressure port P3 for subsequent actuators in the outlet element

Version "CR" Outlet element with tank port T and pressure port P4 for subsequent actuators

2 3; 5 76

TorP3

Sketch 3Sketch 2Sketch 1

Symbols (examples)

Inlet elementsOrdering example: SM18 L 1X/AV... M01

Inlet element of sandwich design with pilot operated primarypressure relief valve and pressure gauge port.Tank port T1 plugged, dependent on the selected outletelement.

Ordering example: SM18 L 1X/A-000 M01

Inlet element of sandwich design with pressure gauge port andprimary valve installation cavity plugged.Tank port T1 plugged, dependent on the selected outletelement.

Ordering example: SM18 L 1X/F-000 M01

Inlet element of sandwich design with pressure gauge port,without primary valve installation cavity.Tank port T1 plugged, dependent on the selected outletelement.

1

4

1 Inlet element

2 Directional valve element

3 Outlet element withtank connection T(version "R")

4 With version "R"port T1 is plugged

5 Version "C"

6 Version "L"

7 Version "CR"

b

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RE 64 124/03.00

Circuit example:Parallel circuit with mechanical and hydraulic actuators

BA

a b

BA

BA

P

M

T

b

a

T

Inlet element, intermediate element, outlet element

Outlet element P3

Intermediate elementsBypass channel

p2

Y2

Y3

T

PIntermediate inlet elements for 2nd circuit (Z AV...)Used, for example, with a 2nd pump with its own pressuresetting for SM 18–SM 18 or SM 12–SM 18.

Summation outlet elementAs central tank element "Z...R" for SM 18–SM 18 orSM 12–SM 18.

Further intermediate elements on request.

Directional valve element in parallel circuit with check valvein port P, hydraulic actuator, secondary valve cavitites areplugged.

Directional valve element in parallel circuit with check valvein port P, mechanical actuator (fork, tongue) on connectionside B, anti-cavitaion valve in actuator port A and pilotoperated pressure relief vavle in actuator port B.

Inlet element of sandwich design with pilot operatedpressure relief valve and pressure gauge port M.

Ordering details for completely assembled control block: 3SM18 L 1X/AV... P001 A2G1BEB...P011 H200QQP005 A2G1BQQRM01

a b

Ordering example 1) SM 18 L 1X/C M01

Separated outlet element with pressure carry over throughport P3. Tank port T1 in inlet element (only possible withmono inlet element).

Ordering example 1) SM 18 L 1X/R M01

Separated outlet element with tank port T.1) Ordering examples are stated as separateelement orders - not assembled as a control block.

Separate outlet element with port T.

Directional valve element in parallel circuit without checkvalve in port P, mechanical actuator (fork, tongue) onconnection side B, secondary valve cavitites are notpresent.

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Primary and secondary valves

Ordering details

H... H...

BA

Ordering details

A... Q

BA

Ordering details

EB...

BA

b

The setting of the stated pressure valuesis carried out, for valve version H...,at a flow of 10 L/Min

The setting of the stated pressure valuesis carried out, for verion A... ,at a flow of 2 to 3 L/Min

The setting of the stated pressure valuesis carried out, for version B...,at a flow of 10 L/Min

Note: The pressure setting at the valves must not exceed the maximum permissible pressure of the selected mobile control block.

Assembly instructions

When exchanging the valve cartridges observe the correct tightening torque MA!

The setting of the given pressure valves is carried out for the pilot operated pressure valves at a flow of 10 L/min.

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RE 64 124/03.00

Directional valve elements

BA

a b

BA

a

b

300 bar

225 bara b

P Bypass channel T

P Bypass channel T

BA

a b

P Bypass channel T

BA

a b

P Bypass channel T

P Bypass channel T

Ordering exampleSM 18 L 1X/T011 H200 - EE M01

Directional valve element in tandem circuit with check valve inport P, hydraulic actuator, anit-cavitation valve in the actuatorports.

BA

Ordering exampleG1SM 18 L 1X/S010 A2 AQ Q M01Z 1

Directional valve element in series circuit with check valve inport P, mechanical actuator (fork, tongue) on connection side A,secondary valve cavity plugged.

– Always with secondary valve cavities. If no secondary valvesare requested, the holes are plugged (valves may be fittedlater).

Ordering exampleSM 18 L 1X/P009 A2 R5 BQ Q M01

Directional valve element in parallel circuit without check valvein port P, actuated via levers on connection side B. Secondaryvalve installation cavities are plugged.

Ordering detailsG1SM 18 L 1X/P004 E2 AE H210 M01Z1

Directional valve element in parallel circuit; check valve inport P, mechanical actuation (fork, tongue) on connectionside A, spool with 4th switching position with detent (floatposition), anti-cavitation valve in actuator port A and pressure/anti-cavitation valve in actuator port B.

Ordering exampleG1SM 18 L 1X/T001 A2 AH 225 H300 M01Z1

Directional valve element in tandem circuit with check valve inport P, mechanical actuator (fork, tongue) on connection side A,pressure/anti-cavitation valves in actuator ports. The pressurevalves are set to the given values.

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Types of circuits

Example 1:

When the directional valve elements I or/and IIare operated the flow to further elements isinterrupted.

Mixed circuit

Directional valveelement in parallelcircuit "P"

Inlet elementwithout pressure relief(optional)

Directional valveelement in parallelcircuit "P"

Inlet elementwith pressure relief

Directional valveelement in seriescircuit "S"

Directional valveelement in tandemcircuit "T"

Outlet element

Example 2:

To operate actuator III or/and IV directional valvespools I and II must be in neutral position.

M

P

T

I

II

III

IV

P

M T1

BA

BA

BA

BA

P

T1

AB

AB

AB

AB

IV

III

II

I

AB

AB

AB

AB

I

II

III

IV

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RE 64 124/03.00

Outlet element,port T plugged

BA

BA

M

P T1

External pilot oil supply “X”

Directional valve element,electro-hydraulic actuator,

Directional valve element,electro-hydraulic actuator

T

X

Inlet element,of sandwich design with pressure relief valve and tank port T1

Ordering details for complete control block to above circuit diagram: 2SM18 L 1X/AV...X P011 W200-12QQP001 W200-12QQLM01

– Spool for 4th switched position in "lever forward" or in"lever retracted" position

– Spool with built-in brake valve, single as well asdouble-acting

– Spools with A–B → T throttled

– Spool for differential circuit

Other spool variations

Circuit example, electro-hydraulic operation … W 200 – …1214

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Unit dimensions (Dimensions in mm)

SM 18 control block with mechanical actuator

2.1 Directional valve element SM 18

2.2 Directional valve element SM 18,see RE 64 122

3 Central element (SM 12–SM 18)mutual tank port T2

4 Outlet element SM 18with port T

5 Dimensions seespool return, page 11

6 4 tie rods, MA = 40 Nm

1.1 Inlet element SM 18

1.2 Inlet element SM 18,see RE 64 122

Control block with central element (SM 12–SM 18)

Position

5

1.1

2.1

6

4

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RE 64 124/03.00

Spool return via springA2 ..

Spool return via a springDetent - spool position 2 (B2..)Detent - spool position 1 (C2..)Detent - spool positions 1 and 2 (D2..)B2 ..C2 ..D2 ..

Spool return via a springDetent - spool position 3 (4th position)E2 ..

Types of actuators

Manual actuator with lever (encapsulated).. R5

9 Rotating point of lever

Spool end with fork..G1

Spool end with tongue..Z1

Hydraulic actuatorH 200 16 16

ab

87 49

Unit dimensions (Dimensions in mm)

14

124

32

2025

4573

180

75

= = = ===14

44

≈ 233

50 48 48 38

412828

75

41

75

4 x Ø 11

B1 B2P

M

X

A1 A2T

T X

M

8

82.11.1

7

6

4

SM 18 control block with external pilot oil supply “X”12

Electro-hydraulic actuator ... W200 – ... (see circuit example on page 6)14

Spool returns and types of actuators (Dimensions in mm)

The valve is operated directly via a remote control unit type THE6 or via a signal transmitter with amplifier(see RE 64 383).

1.1 Inlet element

2.1 Directional valve element

4 Outlet element port T plugged

8 Control valveType DRE 4 K ... to RE 29 181 orType 3 WE 4 K C ... to RE 23 140

6 4 tie rods, MA = 40 Nm

7 External “X” controlfluid supply

9

RE 64 124/12.94

Hydraulic actuatorH 400 16 16

b a

100,5 49

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Notes

The specified data is for product description purposes only and may not be deemed to be guaranteedunless expressly confirmed in the contract. All rights reserved – Subject to revision

Mannesmann Rexroth AGRexroth Hydraulics

D-97813 Lohr am MainJahnstraße 3-5 • D-97816 Lohr am MainTelefon 0 93 52 / 18-0Telefax 0 93 52 / 18-23 58 • Telex 6 89 418-0E-Mail product.support@rexroth.deInternet www.rexroth.com

Mannesmann Rexroth S.A.Division Sigma International

BP 101 - 91, bd Irène Joliot-CurieF-69634 • Vénissieux cédex - FranceTél. 04 78 78 52 52Fax. 04 78 78 52 26 • Télex 380 852Internet www.mannesmann-rexroth.fr