Bosch Rexroth | 4WRKE25W6-350L-3X6EG24EK31A1D3M
4WRKE25W6-350L-3X/6EG24EK31/A1D3M
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The 4WRKE25W6-350L-3X/6EG24EK31/A1D3M valve is produced by Bosch Rexroth in the 4WRKE Directional Valves series for proportional control in hydraulic automation systems. It employs spool type W6 and nominal size 25 to meter flow paths suited to medium-large circuits. A linear characteristic curve allows direct correlation between command input and flow output for predictable actuation. The integrated electronics (OBE) accept a ±10 V command/actual signal and run from a 24 V DC supply, so the unit interfaces with common closed-loop controllers. Nominal flow reaches 350 L/min at a pressure drop of 10 bar, supporting rapid cylinder movement. Operating channels p, a, and b are rated to 350 bar, while the return port t can handle up to 250 bar, giving the assembly a broad pressure envelope.
Internal pilot oil supply feeds the control stage, and an external pilot oil drain prevents back-pressure from influencing spool position. During a 315 bar step, pilot oil demand is 11.7 L/min, which the upstream circuit must provide for full dynamic response. A ZDR 6 DP0-4X/40YM-W80 pressure reducing valve stabilizes pilot pressure to maintain repeatability. The ISO 4401-08-07-0-94 porting pattern allows the valve to mount on standardized sub-plates without adapter blocks. A removable coil solenoid eases service by permitting quick replacement without disturbing hydraulic lines. Maximum electrical power draw is 72 W, so panel designers can size the supply accordingly. These features position the valve for precise directional and flow control tasks in mobile or industrial hydraulic equipment.
Technical Specifications
Characteristic Curve
Linear
Command/actual Signal
±10 V
Electronics
Integrated (OBE)
Max Pressure (p/a/b)
350 bar
Max Return Pressure (t)
250 bar
Nominal Flow
350 L/min (Δp 10 bar)
Nominal Size
25
Pilot Oil Drain
External
Pilot Oil Flow (step, 315 Bar)
11.7 L/min
Pilot Oil Supply
Internal
Porting Pattern
ISO 4401-08-07-0-94
Power Consumption (max)
72 W
Pressure Reducing Valve
ZDR 6 DP0-4X/40YM-W80
Solenoid
Removable Coil
Spool Type
W6
Supply Voltage
24 V DC
1620 Old Apex Road
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