Bosch Rexroth | 4WRZ25W9-325-7X6EG24N9EK4D3M
4WRZ25W9-325-7X/6EG24N9EK4/D3M
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The 4WRZ25W9-325-7X/6EG24N9EK4/D3M valve is manufactured by Bosch Rexroth within the WRZ Proportional Directional Valves series and provides variable spool positioning for hydraulic automation systems. It is powered by a 24 V DC supply voltage so machine controllers can drive the solenoid directly from common power rails. A coil resistance of 4.8 Ω at 20 °C matches the voltage level to the magnetic force needed for accurate metering. The permitted max current of 1.5 A limits drive electronics and protects the winding from overheating during dynamic commands. Continuous operation is possible because the duty cycle is rated at 100%. Thermal endurance is supported by a maximum coil temperature of 150 °C, allowing the unit to remain functional near hot manifolds. Electrical connection is through a DIN EN 175301-803 plug which standardizes cable sets and simplifies maintenance. The ISO 4401-08-07-0-94 porting pattern lets the valve bolt to common subplates without custom machining.
The nominal size 25 body passes 325 l/min at a Δp of 10 bar, providing high flow for large actuators. An operating pressure limit of 350 bar enables use in heavy-duty circuits such as presses or mobile equipment. The command value overlap of 15 % creates a controlled deadband to improve neutral stability. Internal pilot supply with external drain reduces external piping for supply yet prevents backpressure from affecting spool control. Port A, B, and T diameters of 25 mm are consistent with the flow rating and ease the transition between the valve and manifold passages. A concealed manual override in the N9 design permits emergency spool shifting without exposing moving parts during normal service. NBR seals, identified by code M, are selected for compatibility with standard mineral hydraulic oils. The assembled unit weighs 18.2 kg, so mounting surfaces must handle the static load.
Technical Specifications
Coil Resistance (20 °c)
4.8 Ω
Command Value Overlap
15%
Duty Cycle
100%
Electrical Connection
DIN EN 175301-803
Manual Override
Concealed (N9)
Max Coil Temperature
150 °C
Max Current
1.5 A
Nominal Flow @ ∆p 10 Bar
325 l/min
Nominal Size
25
Operating Pressure (main, Max)
350 bar
Pilot Oil
Internal Supply, External Drain
Port A/b/t Diameter
25 mm
Porting Pattern
ISO 4401-08-07-0-94
Seals
NBR (M)
Supply Voltage
24 V DC
Weight
18.2 kg
1620 Old Apex Road
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