Bosch Rexroth | 4WRZE25E325-7X6EG24N9EK31A1V
4WRZE25E325-7X/6EG24N9EK31/A1V
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The 4WRZE25E325-7X/6EG24N9EK31/A1V proportional directional valve is part of the WRZ Proportional Directional Valves series and is manufactured by Bosch Rexroth for closed-loop hydraulic automation. It accepts a ±10 V command signal to shift the spool, and its electronics draw up to 1.8 A from a 24 V DC supply to generate the required coil force. A DIN EN 175201-804 connector provides the electrical interface, while the housing attains IP65 protection so the unit can be mounted in wash-down or outdoor manifolds. The nominal flow reaches 325 l/min at a 10 bar pressure drop, and the main stage can withstand operating pressures up to 350 bar. Pilot oil is taken internally and returned externally, with a control flow of 7 l/min to move the spool smoothly across the full stroke. A concealed manual override permits local actuation when the signal is absent without exposing sensitive parts.
Hysteresis is kept within 6 %, which minimizes deviation between input voltage and spool position during precision positioning sequences. The coil insulation tolerates temperatures up to 150 °C so continuous energization near hot manifolds does not accelerate aging. The return port T can handle 250 bar, enabling the valve to drain into back-pressurized tanks, while the pilot drain port Y is limited to 30 bar to protect the control stage from overload. A 10 cm³ pilot oil volume is displaced when the command travels from zero to full scale, ensuring the pilot spool moves smoothly without cavitation under the defined pilot flow. With a total mass of 18.4 kg the assembly sits firmly on standardized sub-plates, resisting vibration and maintaining alignment during dynamic load changes.
Technical Specifications
Command Signal
+/-10 V
Current Consumption (max)
1.8 A
Electrical Connection
DIN EN 175201-804
Hysteresis (max)
6%
Manual Override
Concealed
Max Coil Temperature
150 °C
Nominal Flow
325 l/min (Δp=10 bar)
Operating Pressure (max)
350 bar
Pilot Drain Port Y Pressure (max)
30 bar
Pilot Oil Configuration
Internal Supply, External Drain
Pilot Oil Flow (0-100%)
7 l/min
Pilot Oil Volume (0-100%)
10 cm3
Protection Class
IP65
Return Port T Pressure (max)
250 bar
Supply Voltage
24 V DC
Weight
18.4 kg
1620 Old Apex Road
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