VICKERS Pressure Relief Valves Unloading Relief …

1 EURT*EURG*May 1996GB-404 AEURG1/2-06/10, 13 Design and EURT1/2-06/10, 12 DesignSectional IllustrationsBasic CharacteristicsMountingPipe or subplate mounting.. Unloading pressureUp to 210 bar.. (3000 psi)Rated flowUp to 246 L/min.. (65 USgpm)Method of actuationInternally piloted.. General DescriptionUnloading Relief Valves are primarilyused in hydraulic circuits incorporatingaccumulators where a pressureregulator is required to automaticallyunload the pump when the pressurereaches the pre-adjusted pressuresetting of the the Pressure has dropped toapproximately 85% of the valve settingthe valve spool closes, thus diverting thepump delivery to the the EURG models an integral checkvalve prevents return flow from theaccumulator through the unloadingvalve; for the EURT model to providethis function a separate right anglecheck valve, model C2-815 (3/4I) orC2-825 (11/4I) must be Valves may also be used with adouble pump to deliver a large volumeof oil to the system at low Pressure anda small volume at high Pressure , servingthe same function as a separateunloading valve and check Pressure Relief ValvesUnloading Relief ValvesEURG1 EURG2 EURT1 EURT21.

2 Single pump/accumulator system2. Double pump systemApplicationsNote that the EURG1 model shown in both systems can be replacedby the EURG2 or an EURT* plus the external check valve(F3) EUR**1423123 Seals for phosphate ester fluids(See also the Hydraulic Fluids section)Omit if not requiredMounting methodG = Subplate mountedT = Pipeline mountedDrain1 = External drain2 = Internal drainNominal port size06 =3/4I10 = 11/4 IPressure adjustment rangeB = 25 - 69 bar (350 - 1000 psi)C = 35 - 138 bar (500 - 2000 psi)F = 104 - 210 bar (1500 - 3000 psi)4-**6* - - * (V) -**578 High venting springEURG models onlyOmit if not requiredDesign number12 = EURT model13 = EURG modelDesign numbers are subject to dimensions remain the samefor design numbers 10 to 19 tappings/fixing boltsUB = G (BSPF) port tappings(EURT models)UG= Accept metric or inch fixing bolts(EURG models)5678 ValvesEURG1M12**--20-R12 Nominal port size06 =3/4I10 = 11/4 IDesign number, 20 seriesSubject to change.

3 Installationdimensions remain the same for designnumbers 20 to 29 Fixing Bolt Kits(EURG Valves )BKUR-06-682M for EURG-06 Valves E-BKUR-10-683M (Assy. no. 460852)for EURG-10 valvesSubplate2 Functional SymbolsModel Codes3 Operating DataMax. PressuresPressure inlet and system portsUp to 210 bar (3000 psi).. dependent on modelTank portsEUR*1 modelsUp to 85%.. of inlet pressureEUR*2 modelsUp to 5%.. of inlet pressurePilot Pressure portEURT* modelsUp to 210 bar .. (3000 psi) dependenton modelDrain portEUR*1 modelsDrain must be.. connected to tankthrough a surge free lineso there will be no backpressure at this to connect the drain can result ininfinite system pressures and models are internally drainedand this port is not Adjustment RangeSee Model Code .Flow DataRated flow, L/min (USgpm)EURT*-0675 (284).

4 EURG*-0695 (360).. EURT*-10190 (720).. EURG*-10246 (930).. Hydraulic FluidsAll Valves can be used with antiwearhydraulic oils, water-in-oil emulsions andwater-glycols. Add prefix F3 to modeldesignation when phosphate ester (notalkyl-based) or chlorinatedhydrocarbons are to be extreme operating viscosity range isfrom 860 to 13 cSt (4000 to 70 SUS),but the recommended running range is54 to 13 cSt (245 to 70 SUS).For further information about fluids seeleaflet LimitsAmbientMin. 20_C ( 4_F).. Max.+70_C (+158_F).. Fluid * 20_C( 4_F)+80_C(176_F)+10_C(50_F)+54_C(130_F)* To obtain optimum service life from both fluid and hydraulic system 65_C (150_F) normally is the maximum temperature except for water-containing synthetic fluids consult manufactureror VICKERS representative where limitsare outside those for petroleum the actual temperature range,ensure that viscosities stay within thelimits specified in the Hydraulic Fluids ControlRequirementsRecommendations on contaminationcontrol methods and the selection ofproducts to control fluid condition areincluded in VICKERS publication 9132 or561, VICKERS Guide to SystemicContamination Control.

5 The book alsoincludes information on the Vickersconcept of ProActive Maintenance . Thefollowing recommendations are based onISO cleanliness levels at 2 mm, 5 mm and15 mm. For products in this catalog therecommended levels are:Up to 210 bar (3000 psi)19/17/14.. Installation Dimensions in mm (inches)Accumulator orsystem connectionHGFLP ressure inletconnectionDischarge-to-tankconnecti onCBPNKJADEMC over fixing screws, 4 off:EURG*-06: M8 socket head cap screwTorque to 32-36 Nm (24-26 lbf ft)EURG*-10: M10 socket head cap screwTorque to 62-70 Nm (46-51 lbf ft) Pressure gage port:EURG*-06: G1/8 (1/8I BSPF)Torque to 8,4-9,6 Nm (74-85 lbf in)EURG*-10: G1/4 (1/4I BSPF)Torque to 15,3-16,4 Nm ( lbf ft)Vent port:EURG*-06: G1/8 (1/8I BSPF)Torque to 6,8-7,5 Nm (60-66 lbf in)EURG*-10: G1/4 (1/4I BSPF)Torque to 15,3-16,4 Nm ( lbf ft)(If not used port must remain plugged)Drain connection EURG1 only:G1/4 (1/4I BSPF).

6 Torque to15,3-16,4 Nm ( lbf ft)Fixing bolt kits:For EURG*-06 Valves : Kit type BKUR-06-682 MTorque to 257-317 Nm (190-233 lbf ft), lubricatedFor EURG*-10 Valves : Kit type E-BKUR-10-683 MTorque to 503-615 Nm (370-453 lbf ft), lubricatedFor mounting subplates see next angleprojection4 EURG*-06/10 ModelABCDEFGHJKLMNPEURG*-06101,6( )160,3( )23( )139,7( )76,2( )92,2( )124,0( )181,0( )134,1( )108,0( )25,4( )82,8( )17( )26( )EURG*-10120,7( )217,5( )28,6( )179,3( )95,3( )117,6( )157,2( )206,3( )167,6( )138,1( )33,3( )108( )21( )32( )3rd angleprojectionWhen a subplate is not used, amachined pad (as indicated by shadedarea) must be provided for pad must be flat within 0,013 mm( in) and smooth within 1,6 mm(63 microinch). Mounting bolts providedby the customer should be Class 12,9(ISO 898) or better.

7 13,5 ( dia) 25,4 ( dia)6 holes tapped X thread, Y deep7,9 ( ) 7,9 ( dia)WUTVVBAKJGHEDFCLSQPRNMZ for EURG*-06/10 ValvesModelABCDEFGHJKLMEURG1M-06 145( )113( )46 ( )46 ( )66,7( )33,3( )55,6( )33,3( )11,1( )15,9( )162( )EURG1M-10200( )178 ( )146,1( )54 ( )50,8( )88,9( )38,1( )76,2( )44,5( )12,7( )19,1( )184( )ModelNPQRSTUVWXYZEURG1M-06130,2( )69,9( )30,2( )15,9( )34,9( )39,9( )23,9( )48,3( )G3/4IM16 Thru 40(1)23( )EURG1M-10152,4( )82,6( )34,9( )19,1( )41,3( )50( )30,2( )64,3( )G11/4IM2040( )28,6( )Cover fixing screws, 4 off:EURT*-06: M8 socket head cap screwTorque to 32-36 Nm (24-26 lbf ft)EURT*-10: M10 socket head cap screwTorque to 62-70 Nm (46-51 lbf ft)ADPressure inlet or outlet connection:EURT*-06: G3/4 (3/4I BSPF)EURT*-10: G11/4 (11/4I BSPF)Discharge-to-tank connection:EURT*-06: G3/4 (3/4I BSPF)EURT*-10: G11/4 (11/4I BSPF)4 optional positions for adjustment controlmay be obtained by rotating cover torequired positionEURT1 only: Drain port :G1/4 (1/4I BSPF).

8 Torque to15,3-16,4 Nm ( lbf ft) Pressure gage port:EURT*-06: G1/8 (1/8I BSPF)Torque to 6,8-7,5 Nm (60-66 lbf in)EURT*-10: G1/4 (1/4I BSPF)Torque to 15,3-16,4 Nm ( lbf ft)Pilot Pressure connection forunloading pump, G1/4 (1/4I BSPF)GHFBCE3rd angleprojection6 EURT*-06/10 ModelABCDEFGHEURT*-0677,7( )133,4( )65( )159( )57,2( )108,0( )127,8( )63,5( )EURT*-1095,3( )165,1 ( )76,2( )189( )76,2( )127,0( )137( )76, ( )7 Mass, kg (lb)EURG*-0611,4 ( ).. EURG*-1022,1 ( ).. EURT*-064,6 ( ).. EURT*-109,1 ( ).. EURG1M-065,7 ( ).. EURG1M-109,3 ( ).. Mounting ProcedureBefore ordering check availability withthe VICKERS representative. Valves ,subplates and bolt kits are supplied asseparate items and must be ordered assuch, off -EURG1-06-B-13-UG valves2 off -EURG1M-06-20-R subplates2 off -BKUR-682M bolt kitsIf a EURT valve is required then a checkvalve is also needed and must beordered separately.

9 The check valvesrecommended are C2-815 (3/4I) orC2-825 (11/4I). For further details ofthese Valves refer to leaflet 2334.