Description Features Subplate mounting Machined valve contact surface; Porting pattern according to ISO 4401-03-02-0-05 Pilot control valve for axial piston variable displacement pump, type A4VS with HS5 adjustment Control spool and sleeve in servo quality Actuated on one side, preferred position when switched off or if not released Control solenoid without position feedback Use for electro-hydraulic controls in production and test systems External control electronics via amplifier card or amplifier module Product description The valve type 4WRPH is a direct operated directional control valve without electrical position feedback. Set-up The valve basically consists of 2 main assemblies: Valve housing with control spool and sleeve in servo quality (1) Control solenoid with position transducer (2) Type code 01 02 03 04 05 06 07 08 09 10 11 12 13 14 4 WRP H 6 C L ‒ 2X / G24 Z4 / ‒ 855 01 4 main ports 4 02 High-response directional valve, direct operated WRP 03 For external analog electronics no code 04 Sleeve H 05 Size 6 6 Symbol 06 Symbols; for the possible version, see "Symbols/Circuit diagrams" C Installation side control solenoid 07 Valve side A A 1) Valve side B B Rated flow at 70 bar valve pressure differential (35 bar/control edge) 08 24 l/min 24 40 l/min 40 Flow characteristic 09 Linear L 10 Component series 20 ... 29 (20 ... 29: unchanged installation and connection dimensions) - Size 6 2X 11 Supply voltage of the control electronics 24 V G24 Electrical connection 12 Individual connection With mating connector; connector DIN EN 175301-803 Z4 Seal material 13 NBR seals M FKM seals V Observe compatibility of seals with hydraulic fluid used. 14 Control solenoid without position control; control spool without overcompensation of fl ow forces 855 1) When using as pilot control valve for axial piston variable displacement pump, type A4VS with HS5 adjustment Technical data Hydraulic fluid Classification Suitable sealing materials Standards Data sheet Mineral oils HL, HLP, HLPD, HVLP, HVLPD NBR, FKM DIN 51524 90220 Bio-degradable ⇒Insoluble in water HETG NBR, FKM ISO 15380 90221 HEES FKM ⇒Soluble in water HEPG FKM ISO 15380 Flame-resistant ⇒Water-free HFDU, HFDR FKM ISO 12922 90222 ⇒Containing water HFC (Fuchs Hydrotherm 46M, Petrofer Ultra Safe 620) NBR ISO 12922 90223 Important information on hydraulic fluids: For further information and data on the use of other hydraulic fluids, please contact us. There may be limitations regarding the technical valve data (temperature, pressure range, life cycle, maintenance intervals, etc.). The flash point of the hydraulic fluid used must be 40 K higher than the maximum solenoid surface temperature. • Flame-resistant – containing water: - Maximum pressure differential per control edge 175 bar - Pressure pre-loading at the tank port > 20 % of the pressure differential, otherwise increased cavitation - Life cycle as compared to operation with mineral oil HL, HLP 50 … 100% Diagrams/characteristic curves measured
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