Bosch Rexroth | 4WRZ25W6-325-7X6EG24K4D3M
4WRZ25W6-325-7X/6EG24K4/D3M
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The 4WRZ25W6-325-7X/6EG24K4/D3M proportional directional valve is supplied by Bosch Rexroth in the WRZ Proportional Directional Valves series. It meters flow and direction for hydraulic automation where fast and accurate actuator control is required. The main stage delivers a nominal flow of 325 l/min at a 10 bar differential, matching medium- to high-capacity cylinders and motors. A maximum operating pressure of 350 bar lets the valve handle high-pressure circuits without external pressure reducers. Port A, B, and T diameters of 25 mm and a port P diameter of 24 mm maintain low pressure loss at the rated flow, while the ISO 4401-08-07-0-94 porting pattern lets the unit mount directly on common size-25 subplates. Mineral oil of class HL or HLP to DIN 51524 must be used, and the hydraulic fluid must reach cleanliness level ISO 4406 20/18/15 to keep wear low. A ZDR 6 DP0-4X/40YM-W80 pilot pressure reducing valve feeds the control stage, and port Y is limited to 30 bar so the pilot drain remains within safe limits.
Electrical integration relies on a DIN EN 175301-803 form K4 connector, and the assembled socket provides IP65 protection against dust and water jets during machine wash-down. The proportional solenoid draws up to 1.5 A, and its coil can reach 150 °C, so power amplifiers and wiring must withstand elevated current and temperature. Valve hysteresis does not exceed 6 %, ensuring repeatable spool positioning for closed-loop motion profiles. An external drain routed through return port T can accept 250 bar, which helps deal with elevated back pressure in systems with long tank lines or counterbalance valves. The subplate for size 25 weighs 18.2 kg, affecting support brackets and installation ergonomics when assembling manifolds. These electrical and mechanical parameters complete the functional profile required to integrate the 4WRZ25W6-325-7X/6EG24K4/D3M into automated hydraulic platforms.
Technical Specifications
Electrical Connection
DIN EN 175301-803 (K4)
Electrical Protection
IP65 (with cable socket)
Fluid Cleanliness (main Valve)
ISO 4406 20/18/15
Hydraulic Fluid
Mineral Oil (HL, HLP) DIN 51524
Hysteresis (max)
6%
Max Coil Temperature
150 °C
Max Current
1.5 A
Max Operating Pressure (main Valve)
350 bar
Nominal Flow (10 Bar Δp)
325 l/min
Pilot Pressure Reducing Valve
ZDR 6 DP0-4X/40YM-W80
Port A/b/t Diameter
25 mm
Port P Diameter
24 mm
Port Y Pressure (max)
30 bar
Porting Pattern
ISO 4401-08-07-0-94
Return Port T Pressure (ext Drain)
250 bar
Weight (subplate, Size 25)
18.2 kg
1620 Old Apex Road
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