Bosch Rexroth | 4WRKE25E1-350L-3X6EG24K31A1D3V
4WRKE25E1-350L-3X/6EG24K31/A1D3V
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The 4WRKE25E1-350L-3X/6EG24K31/A1D3V valve belongs to the 4WRKE Directional Valves series and is manufactured by Bosch Rexroth for hydraulic automation tasks that require electronic flow and pressure control. It operates with a command and feedback signal of ±10 V, allowing proportional positioning of the main spool. The integrated electronics run from a 24 V DC supply and can draw up to 72 W during peak load. The nominal size is 25, and the porting pattern follows ISO 4401-08-07-0-94, giving compatibility with standardized subplates. A nominal flow of 350 L/min at a 10 bar pressure drop defines its performance envelope, while the main stage can pass 870 L/min at full opening. The valve withstands line pressures up to 350 bar on ports P, A, and B, and the pilot oil may be supplied externally at pressures up to 315 bar. Hysteresis is limited to 1 percent, supporting repeatable spool movement during closed-loop operation.
The housing is sealed to IP65, so hydraulic and electronic sections resist dust ingress and water jets during machine wash-down. FKM seals are fitted to handle high-temperature hydraulic fluids and aggressive additives. The pilot circuit draws 11.7 L/min during a step change at the maximum pilot pressure. Drain flow exits externally, and the associated pilot drain line tolerates pressures up to 250 bar without impairing stability. An electro-hydraulic pilot stage converts the drive current into precise hydraulic forces that shift the main spool. This arrangement keeps the metering edges steady even when the primary ports operate near the valve’s maximum rated flow.
Technical Specifications
Command/actual Signal
±10 V
Enclosure Protection
IP65
Hysteresis
1% (max)
Max Main Valve Flow
870 L/min
Max Pilot Drain Pressure (external)
250 bar
Max Pressure (p,a,b)
350 bar
Nominal Flow (Δp 10 Bar)
350 L/min
Nominal Size
25
Pilot Oil Drain
External
Pilot Oil Flow (step, 315 Bar)
11.7 L/min
Pilot Oil Supply
External
Pilot Oil Supply Pressure (max)
315 bar
Porting Pattern
ISO 4401-08-07-0-94
Power (max)
72 W
Seal Material
FKM
Supply Voltage
24 V DC
1620 Old Apex Road
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