Bosch Rexroth | 4WRZE25W8-325-7X6EG24N9EK31A1D3V
4WRZE25W8-325-7X/6EG24N9EK31/A1D3V
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The 4WRZE25W8-325-7X/6EG24N9EK31/A1D3V valve is produced by Bosch Rexroth within the WRZ Proportional Directional Valves series. It regulates actuator speed and direction in hydraulic automation circuits. The unit is specified as size 25, a dimension that establishes porting geometry for high-capacity flow paths. Under a differential pressure of 10 bar it delivers a nominal flow of 325 l/min, while its channels can pass up to 870 l/min when demands peak. The main stage tolerates operating pressures up to 350 bar, enabling operation on high-pressure supply lines common in mobile and industrial machinery. Spool position is commanded with a ±10 V analog signal, giving the controller proportional authority over flow rate. Internal electronics are powered from a 24 V DC supply, isolating control circuitry from the hydraulic side. The magnetic pilot assembly draws a maximum of 2.5 A, defining the current limit for drive amplifiers and protecting the coil from overheating.
For continuous service the valve is rated for a 100 % duty cycle, so modulation can be maintained without thermal pauses. Electrical interfacing is through a DIN EN 175201-804 plug, and the enclosure carries an IP65 rating to block dust and low-pressure water jets encountered in factory environments. A concealed manual override permits direct spool displacement during commissioning or in case of control loss. Return lines may be connected externally for pressures up to 250 bar, or internally when back-pressure does not exceed 30 bar, offering flexibility in tank routing. Pilot control is handled by a size 6 valve, and a ZDR 6 DP0-4X/40YM-W80 pressure reducing cartridge maintains a stable pilot feed to the main stage. Fluid sealing is accomplished with FKM elastomers, supporting operation with standard hydraulic oils and many synthetic media.
Technical Specifications
Command Signal Input
±10 V
Duty Cycle
100%
Electrical Connection
DIN EN 175201-804 Plug
Electrical Protection
IP65
Manual Override
Concealed
Max Flow
870 l/min
Max Operating Pressure (main)
350 bar
Max Return Pressure (external Drain)
250 bar
Max Return Pressure (internal Drain)
30 bar
Max Solenoid Current
2.5 A
Nominal Flow (Δp = 10 Bar)
325 l/min
Pilot Valve Size
6
Pressure Reducing Valve
ZDR 6 DP0-4X/40YM-W80
Seals
FKM
Supply Voltage (electronics)
24 V DC
Valve Size
25
1620 Old Apex Road
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