Bosch Rexroth | 4WRZE25E3-325-7X6EG24N9ETK31A1V
4WRZE25E3-325-7X/6EG24N9ETK31/A1V
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The 4WRZE25E3-325-7X/6EG24N9ETK31/A1V valve is part of the WRZ Proportional Directional Valves series manufactured by Bosch Rexroth. It meters hydraulic flow in closed-loop automation circuits where precise spool positioning is required. The unit operates on a 24 V DC supply and accepts a ±10 V command signal that drives the integrated pilot stage. Electrical connection is made through a DIN EN 175201-804 K31 plug, and the design supports continuous service with a 100 % duty cycle. Installation uses the ISO 4401-08-07-0-94 interface, allowing direct mounting on standard subplates. Enclosure protection is rated IP65 to guard against dust and low-pressure water jets, and the assembly weighs 18.4 kg for manageable handling. When the pressure drop across the main stage is 10 bar, the nominal flow reaches 325 l/min, enabling accurate actuator speed control in medium-flow systems.
The main stage is sized for a maximum flow of 870 l/min, so the valve can direct large volumes when system demands rise. It withstands main pressure up to 350 bar without performance loss, while port Y is limited to 30 bar to protect the pilot drain circuit. Return conditions are separated: the external T port tolerates 250 bar, whereas the internal T port must remain below 30 bar to avoid back-pressure on the spool. Pilot performance is defined by a 7 l/min oil flow and a 10 cm³ oil volume over the full 0 – 100 % stroke range, providing fast but stable command response. These hydraulic limits complement the electrical and mounting parameters described earlier to provide consistent directional control in servo-grade machinery loops.
Technical Specifications
Command Signal
+/- 10 V
Duty Cycle
100%
Electrical Connection
Plug DIN EN 175201-804 (K31)
Max Main Flow
870 l/min
Max Main Pressure
350 bar
Max Port Y Pressure
30 bar
Max Return Pressure Port T (external)
250 bar
Max Return Pressure Port T (internal)
30 bar
Mounting Interface
ISO 4401-08-07-0-94
Nominal Flow (10 Bar Δp)
325 l/min
Pilot Oil Flow (0 To 100%)
7 l/min
Pilot Oil Volume (0 To 100%)
10 cm3
Protection Class
IP65
Supply Voltage
24 V DC
Weight
18.4 kg
1620 Old Apex Road
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