Bosch Rexroth | 4WRZ25W8-325-7X6EG24N9ETK4V
4WRZ25W8-325-7X/6EG24N9ETK4/V
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The 4WRZ25W8-325-7X/6EG24N9ETK4/V proportional directional valve belongs to the WRZ Proportional Directional Valves series and is produced by Bosch Rexroth. It meters hydraulic flow to actuators and supports closed-loop control in industrial automation. The valve passes 325 l/min at a 10 bar differential, and the main channel sustains 350 bar operating pressure. Acceptable oil cleanliness for the main path is ISO 4406 20/18/15, and the device is specified for mineral oil types HL or HLP. Electrical actuation uses a 24 V DC supply; the coil draws 1.5 A and shows a 4.8 Ω resistance at 20 °C, allowing precise current regulation. A 100 percent duty cycle permits continuous energization, while the winding tolerates 150 °C so overheating margin is available. An IP65 enclosure shields the connector and housing against dust and water spray, and the assembled mass of 18.2 kg should be considered when sizing mounting brackets.
Internal pilot circuitry simplifies manifold layouts because both supply and drain are routed inside the housing. The integrated pilot feed delivers 7 l/min across the full command span, giving the spool consistent control pressure without external restrictors. Return flow from the pilot stage is likewise discharged internally, and the tank line may run up to 30 bar without disturbing valve dynamics. Contamination limits for the pilot channels are tighter at ISO 4406 18/16/13, safeguarding the fine orifices that set pilot flow accuracy. With these fluid and pressure provisions the pilot section remains responsive, enabling proportional positioning of the main spool under varying load conditions. Combined with the high-flow main stage and continuous electrical duty, the internal pilot arrangement equips the valve for compact, high-response hydraulic axes where external piping space is restricted.
Technical Specifications
Cleanliness Class (main)
ISO 4406 20/18/15
Cleanliness Class (pilot)
ISO 4406 18/16/13
Coil Resistance (20 °c)
4.8 Ω
Duty Cycle
100 %
Hydraulic Fluid
Mineral Oil (HL, HLP)
Max Coil Temperature
150 °C
Max Current
1.5 A
Max Operating Pressure (main)
350 bar
Nominal Flow @Δp 10 Bar
325 l/min
Nominal Voltage
24 V DC
Pilot Oil Drain
Internal
Pilot Oil Flow (0→100%)
7 l/min
Pilot Oil Supply
Internal
Tank Port Pressure (internal Drain)
30 bar
Type Of Protection
IP65
Weight
18.2 kg
1620 Old Apex Road
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