0463
-Sandwichplatestructure
-
PortingpatterntoDIN24340,formAandISO4401
-4pressureratings
-3adjustmentelements:
•Rotaryknob
•Adjustableboltwithprotectivecap
•Lockablerotaryknob
-Pressuregauge󼴩tting
-Checkvalve,optional
Size10
upto210bar
upto50L/min
Type ZDR10D...40
FeaturesContents
Pressure reducing valve
direct operated
01/06
3.19
Functionandcon󼴩guration 02
Symbols 02
Orderingcode 03
Technicaldata 03
Characteristiccurves 04
Unitdimensions 05
Hengli hydraulic ｜ Hydraulic components
/06
0464
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02
4
3 8
5
7
2 6
9
1
A1 P1 B1 Tb1Ta1
A2 P2 B2Ta2
AT P A B TB
2
1
M
TA P A B TB
2
1
M
TA P A B TB
2
1
M
TA P A B TBTA P A B TB
M M
22
1
1
Pressure valves ｜ Type ZDR10D...40
PressurereducingvalvestypeZDR10D..are3-waydirectoperatedpressurereducingvalvesofsandwich
platedesignwithapressurereducingfunctiononthesecondaryside.Itisusedtoreducethesystem
pressure.Thepressurereducingbasicallyconsistsofthehousing(1),thecontrolspool(2),
oneortwo
compressionspring(3)andtheadjustmentelement(4)aswellaswithanoptionalcheckvalve.
Atstaticstate,thevalveisnormallyopen,󼴪uidcan󼴪owfreefromportP2toportP1(version"DP")or
portA1toportA2(version"DA").PressureinportP1actsatthespoolarea(6)viacontrolline(5)andis
balancedwiththesettingvalueofthecompressionspring.WhenthepressureinportP1exceedsthe
settingvalueofthespring(3),thecontrolspool(2)movesfurthertowardsthecompressionspring(3),
theopeningapertureatportPisgettingsmalleruntil󼴪uidatportP1󼴪owsbacktotankviathecontrol
land(7)topreventanyfurtherriseinpressure.Theleakageoilinspringchamber(8)isalwaysdrainedto
tankviaportT.
Acheckvalvecanbe󼴩ttedoptionallyinversion"DA"forfree󼴪owfromportsA2toportsA1.
Apressuregaugeconnection(9)permitsthesecondarypressuretobemonitored.
Type ZDR10DP1-40/...
Note:
1.Becausethereisinternalleakage,whensandwichplate
pressurereducingvalveisusedinpairswithsandwich
pilotoperatedcheckvalve,pressurereducingvalvemust
be󼴩xedbetweenthecheckvalveanddirectionalcontrol
valve.
2.AsforZDR10DPandZDR10DA,leakageoilfromportTB1
󼴪owsviathebuilt-upvalvetoportTA2,somanifold(plate)
musthaveaportTA,whileforZDR10D,leakageoilfrom
portTA1flowsviathebuilt-upvalvetoportTB2,so
manifold(plate)musthaveaportTB.
Symbols
Type ZDR10DA-40/...YM Type ZDR10DA-40/...Y Type ZDR10DP-40/...YM
Type ZDR10DB-40/...YM Type ZDR10DB-40/...Y
①=valveside
②=sub-plateside
Function and con󼴩guration
0465
03
Hydraulic components ｜ Hengli hydraulic
03 /06
Pressure valves ｜ Type ZDR10D...40
Ordering code
Technical data
/
40
DRZ D10
*
Pressurereducingvalve=DR
Sandwichplate=Z
Furtherdetails
incleartext
Size10=10
Series40=40
Directoperated=D
Nocode=NBRseals
V=FKMseals
Nocode=Withcheckvalve
(versionDAandDB)
M=Withoutcheckvalve
Y=Pilotoilsupplyinternaland
drainexternal
2.5=Max.secondarypressure25bar
7.5=Max.secondarypressure75bar
15=Max.secondarypressure150bar
21=Max.secondarypressure210bar
PressurereductioninportA2=A
PressurereductioninportB2=B
PressurereductioninportP1=P
Rotaryknob=1
Adjustableboltwithprotectivecap=2
Lockablerotaryknob=3
Fluid
MineraloilsuitableforNBRandFKMseal
PhosphateesterforFKMseal
Fluidtemperaturerange ℃
-30to+80(NBRseal)
-20to+80(FKMseal)
Viscosityrange mm
2
/s 10to800
Degreeofcontamination
Maximumpermissibledegreeof󼴪uidcontamination:
Class9.NAS1638or20/18/15,ISO4406
Max.operatingpressure(inlet) bar 315
Max.secondarypressure(output) bar 25;75;150;210
Backpressure bar 150
Max.󼴪ow-rate L/min 50
Weight Kg Approx.2.8
Y
Hengli hydraulic ｜ Hydraulic components
/06
0466
03
04
Pressure valves ｜ Type ZDR10D...40
Pressure range (bar)
P
A
-Q characteristic curve
Pressure differential (bar)→
P
Amin
-Q characteristic curve
20
40
60
80
100
120
140
160
180
200
220
0510 2010 30 40
25
75
150
210
1
2
3
4
5
6
7
8
9
10
100 20 30 40 50
≤1MPa
≥1MPa
A1 to T (Y) A to A1
P-Q characteristic curve
via the check valve
Flow (L/min )→
Flow (L/min )→
Flow (L/min )→
Secondary pressure (bar)→
0
2
4
6
8
10
10 20 30 40 50
Secondary pressure increment (bar)→
Characteristic curves
(Measuredat
ϑ
oil
=40℃ ±5℃ ,usingHLP46)
Note:
Thecurvecharacteristicsremaininacertain
pressurerangewithalowsettingpressure.
25barPAmin-Qcharacteristiccurveshowsthe
󼴪owfromA1toA2inrelationtotheadjustable
min.settingpressurefromP2toP1.
Example:
IfthepressureofportA2orP1issettingto30bar
underthe󼴪owof10L/min,whenthesecondary
pressureincreasesto34bar,the󼴪ow-rate
reducesandtrendstozero.
0467
/06
03
Hydraulic components ｜ Hengli hydraulic
05
1 2
11
238.5
3.5
18.5
50
12
70
46
Φ60
16
11
54
7
4
5
11
3
9
8
10
11
48
Φ60
Φ35
28
13
P
A B
TB
100
4×Φ6.7
239.5
210.5
TA
Requirement for
mounting surface
0.01/100
0.8
12
M10×1
24.2 23.3
Φ60
2
6
M10×1
12 7
23.3
11
15.516
24.2
M10×1
17
1
3.5
11
4 5
10
239.5
100
18.5
12
50
46
70
54
210.5
11
28
48
8
9
3
13
P
A
TB
TA
B
4×Φ6.7
Φ60
Φ35
238.5
5×Φ10.5 max
46
32.5
21.4
6.3
Valve fixing screw holes
Dimensions of
mounting surface
4×M6;12
P
A
TB
TA
B
3.2
54
50.8
37.3
27
16.7
Pressure valves ｜ Type ZDR10D...40
Unit dimensions
(Dimensionsinmm)
·Type:
ZDR10DA or
ZDR10DP
1Nameplate
2Adjustmentelement"1"
3Adjustmentelement"2"
4Adjustmentelement"3"
5Sleevewithscale
6Pressuregaugeconnection
forversionDPM10x1,12deep
7Pressuregaugeconnection
forversionDAM10x1,12deep
8Adjustablestroke
9Spacerequiredtomoveoutthekey
10Valvemountingholes
11O-rings12×2(PortA,B,P,TA,TB)
12CheckvalveoptionalforversionDA
13Thishole(holeTBforversionDA,TAforversionDB)ispluggedwhenitisversionZDR10...40/2.5,
andworksasdrainportwhentheversionareZDR10...40/7.5,ZDR10...40/15andZDR10...40/21,
however,thisholedon'tinterconnecttothesidewithO-rings.
Whenthisholeisusedasareturnoilport,ahole(Ø5)mustbedrilledfromtheoppositeside(withO-rings)
asadrainport.(ZDR10...40/2.5isprohibited)SuggestionforselectingportTAandTBon.
Manifold (plate) :
ZDR10DPandZDR10DAuseportTAasdrainport,whileZDR10DBuseportTB.
Valve mounting screws:
M6internalhexagonboltor
LT30.02double-screwbolt
withLT30.03nutGB/T70.1-10.9,
thelengthaccordingtosandwich,
tighteningtorqueM
A
=15.5Nm
mustbeorderedseparately.
·Type ZDR10DB
Hengli hydraulic ｜ Hydraulic components
/06
0468
03
06
Pressure valves ｜ Type ZDR10D...40
©Thisbrochurecanbereproduced,edited,reproducedor
transmittedelectronicallywithouttheauthorizationofHengli
HydraulicCompany.Duetothecontinuousdevelopmentof
theproduct,theinformationinthisbrochureisnotspeci󼴩cto
thespeci󼴩cconditionsorapplicabilityoftheindustry,thus,
Henglidoesnottakeanyresponsibilityforanyincompleteor
inaccuratedescription.
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