ElectroHydraulics Catalog - Continental Hydraulics

1 26ED08 MPROPORTIONAL DIRECTIONALCONTROL VALVESPILOT OPERATED WITHOUT LVDT typicalcode 5 -Rtypicalcode 5typicalcode 3 LVDTLVDTLVDTMOUNTINGSURFACESPOOL STROKESPOOL DISPLACEMENTHYSTERESISTHRESHOLDQUIESCENT FLOWREPEATABILITYDEADBANDVOLTAGE(NOMINAL )CURRENT(MAXIMUM)WATTAGE (i2R) @ 76 (20 C) (continuous)COIL RESISTANCE@ 68 F (20 CFLOW CAPACITY@ 145 psi P(10 bar)(FULL LOOP)MAXIMUMOPERATINGPRESSUREWEIGHTDUTYC YCLEMINIMUM PILOT PRESSURETYPICAL STEP RESPONSETIME (NOMINAL) AC/FC SpoolA1C/F1C SpoolA2C/F2C SpoolA3C/F3C SpoolA40C SpoolP, A, B, X PortsT PortY Port (Center to Offset)(Offset to Offset)with Ditherwith DitherNominal @ 3000 psiwith DitherContinuous @ rated operating current w/ 120 F(49 C) fluid & 100 F (38 C) ambient temperatureCode 12 Code 24 Code 12 Code 24 Code 12 Code 24 Code 12 Code 24 Code 3 Code 575 gpm46 gpm26 gpm12 gpm38 gpm3500 psi3000 psi10 psi250 cu.)

2 Cipm32 lbs31 lbs285 lpm175 lpm99 lpm46 lpm144 lpm250 bar210 bar18 mm18 R1-1984D08 (Formely D06) SIZE 0875 ms85 ms< 6%< 6%< 3%12 VDC24 OhmPower OnSpring Return10% nominal of spool travelThese proportional directional control valves are 4-way,pilot operated, spring centered, sliding spool valves . Theycan be used to control flow direction and rate. Directionalcontrol is achieved by solenoid selection; flow rate is afunction of the solenoid current. The valve spool will returnto center position if electrical power is metering spools (code "C") meter oil intoand out of the hydraulic actuator. These spools provideexcellent control in most applications. The combinationmetering spools are highly recommended for motor circuitsto provide back pressure in either direction.

3 This backpressure provides system stiffness that is required foroptimum control. Combination metering spools can beused with a pressure-compensated module to provideproportional pressure compensated spools (code "I") meter oil into the actuator. Thisspool can be used in applications where the actuator isalways working against a positive (resistive) load. Meter-inspools can be used with a pressure compensated spools (code "O") meter flow out of the spools are commonly used in applications with "runaway" loads such as over-center loads. Also, meter-outspools would be used with high ratio is important to properly size a proportional valve toachieve good resolution. A common mistake in specifyingproportional valves is selecting a spool with too high a ratedflow capacity (low P).

4 The results may be poor control ofthe actuator, particularly with respect to velocity andresolution. The ideal valve size usually is one that providesjust enough maximum flow capability to achieve the desiredvelocity. Consult with Continental about special meteringcharacteristics: unequal-metering, step metering, othernominal flows and other spool caution when applying a separate internally-drainedpressure control valve between the actuator and propor-tional valve. Back pressure created by meter-out orcombination metering proportional valves can add to thespring load of the pressure control valve, resulting in achange of the control pressure :1. Response times are effected by pressure, viscosity & flow Data taken with oil temperature @ 120 F (49 C) and viscosity @ 100 SUS, inlet pressure @ 1000 psi using Continental Hydraulics ECM4 electronic Drain Port (Y) must be connected solely to tank below fluid level.

5 Back pressure or fluctuation of pressures in the drain line may reflect on controlled pressure in the pilot valve and thus the flow output of the main LVDT, OPEN INNER LOOPTYPICAL PERFORMANCE SPECIFICATIONS SPOOL METERING27ED08 MPROPORTIONAL DIRECTIONALCONTROL VALVESPILOT OPERATED WITHOUT LVDTSPOOL CONFIGURATIONSA* C SpoolCombinationMeteringA BP TPRESSURE DROP CURVES(Spools Fully Shifted)PRESSURE DROPbar4036322824201612840psid5505004504 00350300250200150100500 FLOWA3C, F3CA2C, F2CA40CA1C, F1 CACFCFULL LOOP: P > A > B > T OR P > B > A > Tgpm 0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160lpm 0 40 80 120 160240 280 320 360 400440 480 520 560200600 RATINGF* C SpoolCombinationMeteringA BP TPHASE LAG (DEGREES)25% TO 75% INPUT SIGNALFREQUENCY RESPONSE (HZ)AMPLITUDE RATIO (DB).

6 5 12 3 5 6 8 1015 20 420-2-4 -6 -8-10-12210 180 150 120 60 30 090 TESTED WITH CHDAMPLIFIERECM4-L4-P1T1-C1000 PSI @ RATED FLOWWITH SPOOL FULLYSHIFTEDOIL: 150 VG 32 @ +120 RESPONSE CURVES25% TO 75% INPUT SIGNAL28ED08 MPROPORTIONAL DIRECTIONALCONTROL VALVESPILOT OPERATED WITHOUT LVDTFLOW vs. SIGNAL PRESSURE DROP CURVESRATED FLOW @ 145 PSIDA1C/F1C SPOOLRATED @ 46 GPM (175 LPM)0 20 40 60 80 100550 psid (38 bar)350 psid (23 bar)145 psid (10 bar)72 psid (5 bar)1007550250gpm4003002001000lpmFLOWINP UT SIGNAL (%)600 psid (41 bar)400 psid (27 bar)250 psid (17 bar)145 psid (10 bar)72 psid (5 bar)INPUT SIGNAL (%)0 20 40 60 80 100lpm120100806040200gpm 510152025300 FLOWA3C/F3C SPOOLRATED @ 12 GPM (46 LPM)A2C/F2C SPOOLRATED @ 26 GPM (99 LPM)600 psid (41 bar)400 psid (27 bar)250 psid (17 bar)145 psid (10 bar)72 psid (5 bar)INPUT SIGNAL (%)

7 0 20 40 60 80 100 FLOWlpm24016012040200800gpm6050402010 030AC/FC SPOOLRATED @ 75 GPM (285 LPM)475 psid (33 bar)325 psid (22 bar)250 psid (17 bar)145 psid (10 bar)72 psid (5 bar)0 20 40 60 80 100 INPUT SIGNAL (%)lpm500300100400200 0600gpm 0255075100125150 FLOW0 20 40 60 80 100 0102030405060gpmlpm 0 40 80120200240160 FLOWINPUT SIGNAL (%)A40C SPOOLRATED @ 38 GPM (145 LPM)350 psid (24 bar)250 psid (17 bar)145 psid (10 bar)72 psid (5 bar)NOTES: These curves were run at no load flow condition, with ISO VG32 fluid @ 120 F. (49 C.). Pressure drop will change with viscosity. Curves are full loop flow P. Conversions: 1 gpm = lpm; 1 bar = DIRECTIONALCONTROL VALVESPILOT OPERATED WITHOUT LVDTXABTPYSOLENOID "a""A" PORT ENDSOLENOID "b""B" PORT ENDVIEW AAMount to NFPA surface (D08) manifoldwith six 1/2-13NC x 2-1/2" long socket headscrews and lockwashers.

8 Bolt kits are availableas accessory code BD08-275. Recommendedmounting bolt torque is 50 to 60 SHOWN IN: (MILLIMETERS)INCHESNFPA D08 size (formerly D06)For interface pattern seeMounting Surface D SHOWN( ) 3( ) 5--R( ) ( ) ( ) 5A A( ) 5( ) 3( ) DIA. PIN (2)GREY PLUGBLACK PLUG( ) ( ) SOLENOIDA SOLENOID( ) ( ) ( ) ( ) DIRECTIONALCONTROL VALVESPILOT OPERATED WITHOUT LVDTDIMENSIONS SHOWN IN: (MILLIMETERS)INCHES1/2-14 NPTELECTRICALCONNECTION25 ft. TORQUEA SOLENOIDELECTRICALBOX MAY BEROTATED 180 ( ) ( ) B & BT CODE B5 HORDERING INFORMATIONED08M G LFUNCTIONSELECTONE:SELECTONE:SELECTONE:S ELECTONE:SELECTONE:SELECTONE:DOUBLESOLEN OID3-POSITIONSPRINGCENTEREDSINGLESOLENOI D2-POSITIONSPRINGCENTEREDDESCRIPTION35 CODE SPOOLCODEACA1CA2CA3CA40 CFCF1CF2CF3C754626123875462612 NOMINALFLOWRATE(GPM)MECHANICALOPTIONSDOU BLESOLENOIDVALVES ANDSINGLESOLENOIDVALVES WITH"B" SOLENOIDSINGLESOLENOIDVALVESWITH "A"SOLENOIDENERGIZE.

9 P TO A DESCRIPTIONROMITCODEPILOT DRAININTERNALPILOTEXTERNALDRAINEXTERNALP ILOTEXTERNALDRAINOPTION12 CODEELECTRICAL OPTIONS D B BTB5 HCODEDIN 43650 /ISO 4400(FORM A)CONNECTORSTOP ELECTRICALBOX W/OTERMINALPOSTSTOP ELECTRICALBOX WITHTERMINALPOSTS &GROUNDTOP ELECTRICALBOX WITH 5-PINMALE RECEPTACLESFOR 1 OR 2 SOLENOIDSDESCRIPTIONSOLENOID12 VDC24 VDCVOLTAGE2412 CODETYPICAL ORDERING CODE: ED08M-3A1C-G2D-24L31ED08 MPROPORTIONAL DIRECTIONALCONTROL VALVESPILOT OPERATED WITH LVDT typicalcode 5-Rtypicalcode 3typicalcode 5 LVDTLVDTLVDTDESCRIPTIONT hese proportional directional control valves are 4-way,pilot operated, spring centered, sliding spool valves . Theycan be used to control flow direction and rate. Directionalcontrol is achieved by solenoid selection; flow rate is afunction of the input signal.

10 This model features spoolposition feedback via an LVDT for improved valve perfor-mance. The valve spool will return to center position ifelectrical power is METERINGC ombination metering spools (code "C") meter oil intoand out of the hydraulic actuator. These spools provideexcellent control in most applications. The combinationmetering spools are highly recommended for motor circuitsto provide back pressure in either direction. Back pressureprovides system stiffness required for optimum metering spools can be used with a pressure-compensated module to provide proportional pressurecompensated spools (code "I") meter oil into the actuator. Thisspool can be used in applications where the actuator isalways working against a positive (resistive) load.