Bosch Rexroth | 4WRZE25W8-325-7X6EG24N9ETK31A1D3M
4WRZE25W8-325-7X/6EG24N9ETK31/A1D3M
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The 4WRZE25W8-325-7X/6EG24N9ETK31/A1D3M valve belongs to the WRZ Proportional Directional Valves series from Bosch Rexroth and regulates flow and direction in hydraulic automation loops. It operates from a 24 V DC supply so control cabinets can power the solenoids directly from common machine voltages. A command input of ±10 V positions the spool proportionally to the reference signal, allowing closed-loop controllers to vary actuator speed and direction with one interface. Maximum current draw is 1.8 A, which defines conductor sizing and drive output capability. The coil resistance of 2 Ω at 20 °C sets the electrical load seen by the amplifier during cold starts, while a 150 °C coil temperature limit permits reliable duty in hot manifolds. A DIN EN 175201-804 electrical connector provides a standardized plug for fast service swaps, and an IP65 housing rating stops dust ingress and water jets so the unit can be mounted on exposed machinery.
The valve handles a nominal flow of 325 l/min at a 10 bar pressure drop, supporting large cylinder or motor circuits without adding restriction. A 350 bar maximum operating pressure for the main stage allows use in high-pressure mobile or industrial systems, and a 30 bar pilot drain limit protects the pilot section from back-pressure interference. Pilot control uses 7 l/min of oil and displaces 10 cm³ between 0 and 100 % command, values that dictate servo response time and pump sizing. Port diameters are 25 mm on A, B, and T and 24 mm on P, matching common pipe sizes for balanced flow paths. The porting pattern follows ISO 4401-08-07-0-94 so the valve bolts to standard subplates without machining revisions. Subplate mounting weight is 18.4 kg, information needed for bracket design and handling equipment selection.
Technical Specifications
Coil Resistance (cold, 20 °c)
2 Ω
Command Value Input (voltage)
±10 V
Current Consumption (max)
1.8 A
Electrical Connector
DIN EN 175201-804
Max Coil Temperature
150 °C
Max Operating Pressure (main Valve)
350 bar
Max Pilot Drain Pressure (port T)
30 bar
Nominal Flow (Δp=10 Bar)
325 l/min
Pilot Oil Flow (0→100%)
7 l/min
Pilot Oil Volume (0→100%)
10 cm³
Port A/b/t Diameter
25 mm
Port P Diameter
24 mm
Porting Pattern
ISO 4401-08-07-0-94
Protection Class
IP65
Supply Voltage
24 V DC
Weight (subplate Mounting)
18.4 kg
1620 Old Apex Road
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