Bosch Rexroth | 4WRKE25E350L-3X6EG24ETK31A5D3M
4WRKE25E350L-3X/6EG24ETK31/A5D3M
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The 4WRKE25E350L-3X/6EG24ETK31/A5D3M is a directional servo valve produced by Bosch Rexroth within the 4WRKE Directional Valves series. It modulates flow and pressure in hydraulic automation circuits that require precise spool positioning. The valve is built in nominal size 25 so passage dimensions match medium to high flow systems. Under a 10 bar differential it delivers a nominal flow of 350 L/min, while the main stage can pass up to 870 L/min during transient peaks. Operating pressure at ports P, A, and B can reach 350 bar, enabling use in high-pressure manifolds. Electronic control relies on a 24 VDC supply, accepts a ±10 V command signal, and draws no more than 1.5 A. Response sensitivity of 0.5 percent or better supports fine closed-loop positioning.
Pilot circuitry is supplied internally and tolerates pilot pressures up to 315 bar; a ZDR 6 DP0-4X/40YM-W80 pressure reducing valve maintains that limit. The pilot drain faces a static pressure cap of 10 bar to preserve consistent actuator movement. For field feedback, the electronics provide a ±10 V measurement output that reflects spool position. Total hysteresis remains within 1 percent, reducing deadband during small signal changes. An enclosure rating of IP65 shields the assembly from dust ingress and low-pressure water, and NBR seals retain hydraulic fluid under all rated conditions. These design points combine to deliver stable proportional flow control without separate pilot lines while maintaining environmental protection and consistent performance during continuous duty.
Technical Specifications
Command Signal
±10 V
Hysteresis
≤ 1%
Ip Rating
IP65
Main Valve Max Flow
870 L/min
Max Pilot Supply Pressure
315 bar
Max Pressure (p, A, B)
350 bar
Max Supply Current
1.5 A
Measurement Output
±10 V
Nominal Flow (10 Bar Δp)
350 L/min
Nominal Size
25
Pilot Drain Static Pressure
10 bar
Pilot Oil Supply
Internal
Pressure Reducing Valve
ZDR 6 DP0-4X/40YM-W80
Response Sensitivity
≤ 0.5%
Seals
NBR
Supply Voltage
24 VDC
1620 Old Apex Road
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