0785
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-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
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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
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06
/12Directional 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
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
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:
/
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Hengli hydraulic | Hydraulic components 04/12 Directional valves | Type 4WRA and 4WRAE
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
Hydraulic components | Hengli hydraulic
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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
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Hengli hydraulic | Hydraulic components 06/12 Directional valves | Type 4WRA and 4WRAE
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 % →
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
60L/minnominalflowata10barvalvepressuredifferential
7L/minnominalflowata10barvalvepressuredifferential
30L/minnominalflowata10barvalvepressuredifferential
30L/minnominalflowata10barvalvepressuredifferential
· Type 4WRAE (NG 6 and 10)
Hydraulic components | Hengli hydraulic
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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
Performance limit, nominal flow 30 l/min
Performance limit, nominal flow 15 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
Characteristic curves (measuredwithHLP46,ϑoil=40℃±5℃ )
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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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
Characteristic curves (measuredwithHLP46,ϑoil=40℃±5℃ )
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
Hydraulic components | Hengli hydraulic
0793
06
09 /12Directional valves | Type 4WRA and 4WRAE
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
Required surface finish of thevalve mounting surface
Installation DimensionsMounting 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%
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Hengli hydraulic | Hydraulic components 10/12 Directional valves | Type 4WRA and 4WRAE
Unit dimensions (nominaldimensionsinmm)
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
Valve mounting screwsThefollowingvalvefixingscrewsarerecommended:-4S.H.C.S.ISO4762-M5×50-10.9-4GB/T70.1-M5×50-10.9-TighteningtorqueMA=8.9Nm±10%
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
Required surface finish of thevalve mounting surface
Installation DimensionsMounting 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
Hydraulic components | Hengli hydraulic
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06
11 /12Directional valves | Type 4WRA and 4WRAE
Required surface finish of thevalve mounting surface
Installation DimensionsMounting surface
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
Required surface finish of thevalve mounting surface
0.01/100mm
0.8
70
138
4072
.5
Installation DimensionsMounting surface
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
Unit dimensions (nominaldimensionsinmm)
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
Valve mounting screwsThefollowingvalvefixingscrewsarerecommended:-4S.H.C.S.ISO4762-M6×40-10.9-4GB/T70.1-M6×40-10.9-TighteningtorqueMA=15.5Nm±10%
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Hengli hydraulic | Hydraulic components 12/12 Directional valves | Type 4WRA and 4WRAE
Unit dimensions (nominaldimensionsinmm)
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
Valve mounting screwsThefollowingvalvefixingscrewsarerecommended:-4S.H.C.S.ISO4762-M6×40-10.9-4GB/T70.1-M6×40-10.9-TighteningtorqueMA=15.5Nm±10%
Required surface finish of thevalve mounting surface
Installation DimensionsMounting surface
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
Required surface finish of thevalve mounting surface
0.01/100mm
0.8
70
138
4072
.5
Installation DimensionsMounting surface
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