01/12 6.8 proportional directional valves

0785

01/12

-Directoperatedproportionaldirectionalvalvetocontrolthedirectionandmagnitudeofaflow-Forsubplatemounting:PortingpatternconformstoISO4401-Actuationbymeansofproportionalsolenoidswithcentralthreadandremovablecoil-Springcentredcontrolspool-Controlelectronics4WRAE...L2X:integratedelectronics(OBE)withvoltageinputorcurrentinput(A1resp.F1)4WRA...L2X:availablemoduleamplifier

Type 4WRA and 4WRAE

FeaturesContents

Proportional directional valves

6.8

NG6and10Upto315barUpto75L/min

Functionandconfiguration 02Symbols 03Orderingcode 03Technicaldata 04Electricalconnections, 05plug-inconnectors 05Characteristiccurves 06-08Unitdimensions 09-12

0786

06

Hengli hydraulic ｜ Hydraulic components 02/12 Directional valves ｜ Type 4WRA and 4WRAE

Transitional symbols

= EA

= WA

= EE1-

= WW1-

a ba o b a o b

a b

A B

P T

A B

P T

a o a babo

A B

P T

a

A B

P T

12 34 2 4

“a” “b”

T A P BT

Type 4WRA 10...-L2X/...

5

“b”“a ”

A B

Type 4WRAE 6...-L2X/...

6

“ a ”

Type 4WRA 10...A-L2X/...

“ a ”

Type 4WRAE 10...A-L2X/...

T A P B T T A P B T

TP

The4/2-and4/3-wayproportioanldirectionalvalvesaredesignedasdirectoperatedcomponentsforsubplatemounting.Theyareactuatedbymeansofproportionalsolenoidswithcentralthreadandremovablecoil.Thesolenoidsarecontrolledeitherbyexternalcontrolelectronics(type4WRA...L2X)orbyintegratedcontrolelectronics(type4WRAE...L2X).Thevalvesbasicallyconsistof:Body(1)withmountingsurface,Controlspool(3)withcompressionsprings(2),Solenoids(4)withcentralthread,Optionalintegratedelectronics(5).With thesolenoids (4),de-energised, thecontrolspool (3) isheld in thecentralpositionby thecompressionsprings(2).Directoperationofthecontrolspool(3)byenergisingoneoftheproportionalsolenoids(4)e.g.controlofsolenoidright,thenmovementofthecontrolspool (3)tothe left inproportiontotheelectricalinputsignal,andconnectionfromPtoAandBtoTviaorifice-likecrosssectionswithprogressiveflowcharacteristics.

4WRA(E)...A-L2Xthe2switchedpositionvalvesarehoweveronlyfittedwithsolenoid"a".Aplug(6)isfittedinplaceonthe"b"proportionalsolenoid.

Function and configurations

Hydraulic components ｜ Hengli hydraulic

0787

03

06

/12Directional valves ｜ Type 4WRA and 4WRAE


= EA

= WA

= EE1-

= WW1-

a ba o b a o b

a b

A B

P T

A B

P T

a o a babo

A B

P T

a

A B

P T

12 34 2 4

“a” “b”

T A P BT

Type 4WRA 10...-L2X/...

5

“b”“a ”

A B


6

“ a ”


“ a ”


T A P B T T A P B T

TP


= EA

= WA

= EE1-

= WW1-

a ba o b a o b

a b

A B

P T

A B

P T

a o a babo

A B

P T

a

A B

P T

12 34 2 4

“a” “b”

T A P BT

Type 4WRA 10...-L2X/...

5

“b”“a ”

A B


6

“ a ”


“ a ”


T A P B T T A P B T

TP

Ordering code

Withoutintegrated=NocodeWithintegrate=E

WithsymbolsE1-andW1-：P→ A:qvmaxB → T:qv/2P → B:qv/2A → T:qvmax

Note：ForspoolsWandWAthereis,intheneutralposition,aconnectionbetweenAtoTandBtoTwithapprox.3%oftheelevantnominalcrossse-ction.

Nominalsize6=6Nominalsize10=10

*/4WRA L2X G24-

Nocode=for4WRAInterfaceA1orF1for4WRAE:

A1=Commandvalueinput±10VF1=Commandvalueinput4to20mA

V=FKMNocode=NBR

Furtherinformationinplaintext

NominalflowatavalvepressuredifferentialΔP=10barNG6:07=7L/min

15=15L/min30=26L/min

NG10:30=30L/min60=60L/min

Spoolsymbols

Z4=Withplug-inconnectorK4=Withoutplug-inconnectorDT=Withoutplug-inDeutschconnectorK31=Withoutplug-inconnectorZ31=Withplug-inconnector

Powersupplyvoltageofelectriccontroldevice:G24=Powersupplyvoltage24VDC

L2X=SeriesL20~L29(L20toL29,unchangedinstallationandconnectiondimensions)

Solenoidtype(current)Nocode=Solenoidcurrent2.5A

-15=Solenoidcurrent1.5A-8=Solenoidcurrent0.8A

Nocode=WithouthandoverrideN9=Withprotectedhandoverride

Symbols

Without integrated electronics With integrated electronics

Type 4WRA...A-L2X/... Type 4WRAE...A-L2X/...

Type 4WRA...-L2X/... Type 4WRAE...-L2X/...

4WRA:

4WRAE:

/

0788

06


Technical data

1. HydraulicInstallation Optional,preferablyhorizontalNominalsize 6 10

Weight 4WRA...L2X Kg 2.0 6.64WRAE...L2X 2.2 6.8

NominalflowQvnomatΔp=10bar L/min 7,15,26 30,60Hysteresis % ≤ 5Reversalspan % ≤ 1Responsesensitivity % ≤ 0.5Max.operatingpressure

PortsA,B,P bar 315PortT bar 210

Pressurefluid Mineraloil(HL,HLP)toDIN51524Otherpressurefluidsonrequest!

Ambientairtemperaturerange

4WRA...L2X ℃ -20℃to70℃(-4° Fto158° F)4WRAE...L2X ℃ -20℃to50℃(-4° Fto122° F)

Viscosityrange mm²/s 20to380(preferably30to46)FluidCleanlinessClass NAS1638class9orISO4406class20/18/15

2. Electrical 1) Solenoid dataVoltagetype DCCommandvaluesignalfor4WRAE ±10Vor4 ～ 20mAMax.currentpersolenoid A 2.5 1.5 0.8Solenoidcoilresistance

Coldvalueat20℃ Ω 2 4.8 19.5Max.warmvalue 3 7.2 28.8

Duty % ED100%Max.coiltemperature ℃ 150ValveprotectiontoEN60529 IP65 2) Control electronics

Amplifier 4WRA...L2X VT-VSPA2-...-L2X4WRAE...L2X Integratedinthevalve(OBE)

SupplyvoltageNominalvoltage VDC 24Lowerlimitingvalue V 21/22(4WRA),19(4WRAE)Upperlimitingvalue V 35

Amplifierpowerconsumption

Imax A <1.8Impulsecurrent A 3


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/1205Directional valves ｜ Type 4WRA and 4WRAE

To the amplifier To the amplifier

PEA1 2

PEB1 2

PEA1 2

PEB1 2

Φ6.5~Φ11

73.5

Φ28.5 A

B

CD E

F

7 pin Interface Integrated electronics (OBE) Valve

Com.value

Ref. potential

Protective 2）3）

conductor

Voltage GND

Ramp generator 4)

Differential amplifier

Interlock

Power supplySupply 24V

Controller

Input

Output 5）

IU

∑

Under voltage recognition

Step function generator

D

E

AB

PE

+Ui0V-Ui

IU

UU

UU

4）

Electrical connections, plug-in connectors nominaldimensionsinmm

·For type 4WRAE...L2X (withintegratedelectronics(OBE))

·For type 4WRE...L2X (withoutintegratedelectronics)

Connections on thecomponent plug

Connections on the plug-in connector

2)PEisconnectedtothecoolingbodyandthevalvehousing!3)Protectiveconductorscrewedtothevalvehousingandcover.4)Rampcanbeexternallyadjustedfrom0to2.5s,thesameappliesforTupandTdown.5)Outputstagescurrentregulated.

·Integrated electronics (OBE) for type 4WRAE...L2X

·Integrated control electronics for type 4WRAEComponent plug allocation

Contact InterfaceA1signal InterfaceF1signalSupplyvoltage

A 24VDC(U(t)=19Vto35V)B GNDC n.c.1)

Differentialamplifierinput

D ±10V,Re>50KΩ 4to20mA,Re>100ΩE referencepotentionalcommandvalueF n.c.1)

Command value:Apositivecommandvalue0to+10V(or12to20mA)atDandthereferencepotentialatEresultsinaflowfromPtoAandBtoT.Anegativecommandvalue0to–10V(or12to4mA)atDandthereferencepotentialatEresultsinaflowfromPtoBandAtoT.Foravalvewith1solenoidonsidea(e.g.spoolvariantsEAandWA)apositivecommandvalueatDandthereferencepotentialatEresultsinaflowfromPtoBandAtoT.

1)ContactsCandFmustnotbeconnected!

Connection cable:Recommended:–upto25mcablelengthtypeLiYCY7x0.75mm²;–upto50mcablelengthtypeLiYCY7x1.0mm².Foroutsidediameterseeplug-inconnectorsketch.OnlyconnectscreentoPEonthesupplyline.

Forpinallocationalsoseeblockcircuitdiagram.

Plug-inconnectortoDINEN175201-804

Plug-inconnectortoDINEN175301-803orISO4400

0790

06


20

1234

5

1

2

34

5

1

2345

0

10

30

20

0

10

30

20 30 40 50 60 70 80 90 100

20 30 40 50 60 70 80 90 100

20 30 40 50 60 70 80 90 100

0

10

20

30

40

50

Flow

in L

/min

→Fl

ow in

L/m

in →

Flow

in L

/min

→

Flow

in L

/min

→Fl

ow in

L/m

in →

P→A/B→Tor

P→B/A→T

P→A/B→Tor

P→B/A→T

P→A/B→Tor

P→B/A→T

P→A/B→Tor

P→B/A→T

P→A/B→Tor

P→B/A→T

Command value in % →

Command value in % →Command value in % →



20 30 40 50 60 70 80 90 100 20 30 40 50 60 70 80 90 100

1

2,43

5

10

20

40

50

60

70

80

100

30

20

40

60

1

2

5

34

Characteristic curves (measuredwithHLP46,ϑoil=40℃±5℃ )

NG 6

NG 10

1Δp=10barconstant2Δp=20barconstant3Δp=30barconstant4Δp=50barconstant5Δp=100barconstant

Δp=Valvepressuredifferential(inletpressureppminusloadpressurepLminusreturnpressurepT)

1Δp=10barconstant2Δp=20barconstant3Δp=30barconstant4Δp=50barconstant5Δp=100barconstant

Δp=Valvepressuredifferential(inletpressureppminusloadpressurepLminusreturnpressurepT)

15L/minnominalflowata10barvalvepressuredifferential





· Type 4WRAE (NG 6 and 10)


0791

06

07 /12Directional valves ｜ Type 4WRA and 4WRAE

Flow

in L

/min

→Fl

ow in

L/m

in →

Flow

in L

/min

→P→A/B→T

orP→B/A→T

P→A/B→Tor

P→B/A→T

P→A/B→Tor

P→B/A→T

Valve pressure differential in bar →

Valve pressure differentialinbar →

Valve pressure differential in bar →

Stro

ke in

% →

Time in ms →

Signal change in %

100 150 200 250 300500

100 150 200 250 300500

100 150 200 250 300500

Performance limit, nominal flow 7 l/min



10

30

20

10

30

20

10

30

20

40

50

100908070605040302010

0 - 100

0 - 75

0 - 50

0 - 25

0 40 80 120 160 200 0 20 40 60 80

7

6

54321

7654321


NG 6 Transientfunctionwithasteppedformofelectricalinputsign

1.Com. value = 40 %2.Com. value = 50 %3.Com. value = 60 %4.Com. value = 70 %5.Com. value = 80 %6.Com. value = 90 %7.Com. value = 100 %

If the performance limits are exceededthen flow forces occur which lead touncontrolled spool movements.

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06

Hengli hydraulic ｜ Hydraulic components /1208 Directional valves ｜ Type 4WRA and 4WRAE

Flow

in L

/min

→

Flow

in L

/min

→

P→A/B→Tor

P→B/A→T

P→A/B→Tor

P→B/A→T

Valve pressure differential in bar → Valve pressure differential in bar →

Signal change in %

Time in ms →

100 150 200 250 300500 100 150 200 250 300500

Performance limit, nominal flow 30l/min Performance limit, nominal flow 60 l/min

10

30

20

0

70

6050

40

10

3020

0

70605040

9080

100

Stro

ke in

% →

100908070605040302010

0 - 100

0 - 75

0 - 50

0 - 25

0 60 120 180 240 300 0 40 80 120 160

7654321

7

654321


1.Com.value=40%2.Com.value=50%3.Com.value=60%4.Com.value=70%5.Com.value=80%6.Com.value=90%7.Com.value=100%

Iftheperformancelimitsareexceededthenflowforcesoccurwhichleadtouncontrolledspoolmovements.

NG 10 Transientfunctionwithasteppedformofelectricalinputsign


0793

06


68.5 69146

4×Φ7.6 max

310.

75

16.2

5

5.95

26.5

5

32.5

4×M5;100.01/100mm

0.8

206

40.5

10.3

27.819

46

8

15

6

34.27154.12

A B

“b”“a”

T

A

P

B

2347

78.5

13.5

Required surface finish of thevalve mounting surface


Installation DimensionsMounting surface


113

TA

P

B

68.5 69

20627450

46

2347

6

9 4 2 5 8 1 7 3

“a” “b”

13.5

146

0.01/100mm

0.8

4×Φ7.6 max

31 0.75

16.2

5

5.95

26.5

532

.5

4×M5;10

40.5

10.3

27.819

Unit dimensions (nominaldimensionsinmm)

Type 4WRA6...L2X

1Valvehousing2Proportionalsolenoid"a"3Proportionalsolenoid"b"4.1Plug-inconnector"A"4.2Plug-inconnector"B"5Nameplate6IdenticalsealringsforportsA,B,PandT(R-ring9.81×1.5×1.78orO-ring9.25×1.78)7Plugforvalveswithonesolenoid(2switchingpositions,versionsEAorWA)8Spacerequiredtoremovetheplug-inconnector

Valve mounting screwsThefollowingvalvefixingscrewsarerecommended:-4S.H.C.S.ISO4762-M5×50-10.9-4GB/T70.1-M5×50-10.9-TighteningtorqueMA=8.9Nm±10%

0794

06



Type 4WRAE6...L2X

1Valvehousing2Proportionalsolenoid"a"3Proportionalsolenoid"b"4Plug-inconnector5Nameplate6IdenticalsealringsforportsA,B,PandT(R-ring9.81×1.5×1.78orO-ring9.25×1.78)7Plugforvalveswithonesolenoid(2switchingpositions,versionsEAorWA)8Integratedelectronics(OBE)9Spacerequiredtoremovetheplug-inconnector


68.5 69146

4×Φ7.6 max

310.

75

16.2

5

5.95

26.5

5

32.5

4×M5;100.01/100mm

0.8

206

40.5

10.3

27.819

46

8

15

6

34.27154.12

A B

“b”“a”

T

A

P

B

2347

78.5

13.5





113

TA

P

B

68.5 69

20627450

46

2347

6

9 4 2 5 8 1 7 3

“a” “b”

13.5

146

0.01/100mm

0.8

4×Φ7.6 max

31 0.75

16.2

5

5.95

26.5

532

.5

4×M5;10

40.5

10.3

27.819


0795

06




2 4.1 6 5 1 4.2 3

7 8

9

70107

211.692.4

306.4

30 4072

.5 105

15

A B

“b”“a”

P

A BTA TB

19.2


0.01/100mm

0.8

70

138

4072

.5


P

A BTA TB

4 2 6 5 9 1 310

7 8

306.4

211.6

107 92.4

50

“a” “b”

19.2

5×Φ10.5 max

4×M6;12

5450.8

37.32716.7

3.2

6.3

21.4

32.5

46

0.01/100mm

0.8

5×Φ10.5 max

4×M6;12

5450.8

37.32716.7

3.2

6.3

21.4

32.5

46


Type 4WRA10...L2X

1Valvehousing2Proportionalsolenoid"a"3Proportionalsolenoid"b"4.1Plug-inconnector"A"4.2Plug-inconnector"B"5Nameplate6Valvebleedscrew7IdenticalsealringsforportsA,B,PandT(R-ring13×1.6×2orO-ring12×2)8Plugforvalveswithonesolenoid(2switchingpositions,versionsEAorWA)9Spacerequiredtoremovetheplug-inconnector


0796

06



Type 4WRAE10...L2X

1Valvehousing2Proportionalsolenoid"a"3Proportionalsolenoid"b"4Plug-inconnector5Nameplate6Valvebleedscrew7IdenticalsealringsforportsA,B,PandT(R-ring13×1.6×2orO-ring12×2)8Plugforvalveswithonesolenoid(2switchingpositions,versionsEAorWA)9Integratedelectronics(OBE)10Spacerequiredtoremovetheplug-inconnector




2 4.1 6 5 1 4.2 3

7 8

9

70107

211.692.4

306.4

30 4072

.5 105

15

A B

“b”“a”

P

A BTA TB

19.2


0.01/100mm

0.8

70

138

4072

.5


P

A BTA TB

4 2 6 5 9 1 310

7 8

306.4

211.6

107 92.4

50

“a” “b”

19.2

5×Φ10.5 max

4×M6;12

5450.8

37.32716.7

3.2

6.3

21.4

32.5

46

0.01/100mm

0.8

5×Φ10.5 max

4×M6;12

5450.8

37.32716.7

3.2

6.3

21.4

32.5

46

01/12 6.8 proportional directional valves

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