Bosch Rexroth | 4WRZE25R325-7X6EG24N9K31A1D3M
4WRZE25R325-7X/6EG24N9K31/A1D3M
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The 4WRZE25R325-7X/6EG24N9K31/A1D3M proportional directional valve belongs to the WRZ Proportional Directional Valves series and is manufactured by Bosch Rexroth. It regulates hydraulic flow and direction in automated circuits. The valve accepts a ±10 V command input that sets spool position, and this analog range allows pairing with common motion controllers. A 24 V DC supply powers the onboard electronics, which draw up to 1.8 A, while the solenoid can be driven to a maximum of 2.5 A to reach full stroke. Coil resistance is 2 Ω at 20 °C, providing predictable current characteristics for thermal monitoring. Under a 10 bar pressure drop the unit delivers a nominal flow of 325 l/min, supporting steady actuator movement, and maximum hysteresis is limited to 6 %, maintaining repeatable positioning during proportional control.
The hydraulic envelope permits a peak flow of 870 l/min to cover transient demand, and continuous service is rated to 350 bar operating pressure. Port Y pressure is restricted to 30 bar to protect the pilot circuit, while external return through port T can withstand 250 bar and internal return is limited to 30 bar to keep housing loads safe. Pilot operation requires a 7 l/min oil flow and a 10 cm³ volume for a full 0–100 % step, enabling rapid response without unnecessary consumption. Environmental sealing meets IP65, allowing operation in dusty or wet areas. Electrical connection is made through a DIN EN 175201-804 interface, and the standardized plug simplifies installation and field replacement.
Technical Specifications
Coil Resistance (20 °c)
2 Ω
Command Value Input
±10 V
Degree Of Protection
IP65
Electrical Connector
DIN EN 175201-804
Electronics Current Imax
1.8 A
Hysteresis (max)
6%
Max Flow
870 l/min
Max Operating Pressure
350 bar
Max Port Y Pressure
30 bar
Max Return Port T (external)
250 bar
Max Return Port T (internal)
30 bar
Nominal Flow (10 Bar Δp)
325 l/min
Pilot Oil Flow (x/y, Step 0-100%)
7 l/min
Pilot Oil Volume (0-100% Step)
10 cm3
Solenoid Max Current
2.5 A
Supply Voltage
24 V DC
1620 Old Apex Road
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