Bosch Rexroth | 4WRTE25Q2-350P-4X6EG24K31A5WB162M
4WRTE25Q2-350P-4X/6EG24K31/A5WB162M
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The 4WRTE25Q2-350P-4X/6EG24K31/A5WB162M proportional valve belongs to the 4WRTE Directional Control Valves series from Bosch Rexroth and regulates oil flow for automated hydraulic actuators. It accepts a ±10 V command input so a controller can position the spool continuously, and it returns an identical ±10 V actual value output for closed-loop feedback. Electrical power is supplied at 24 V DC, while an operating window between 18 V DC and 35 V DC keeps the electronics stable during line variations. Maximum current draw is limited to 1.6 A to match common power supplies. The spool is ground to provide a linear flow characteristic with fine control, identified by the letter P, and passes 350 L/min at a 5-bar pressure drop across each control edge. A nominal size of NG25 secures compatibility with medium-frame manifolds, and the ISO 4401-08-08-0-05 mounting interface aligns the ports accurately. The assembly weighs 16.8 kg, allowing single-person handling during installation.
For pressure regulation, ports P, A, and B withstand up to 350 bar so the unit can serve high-pressure circuits, while the external T return port is limited to 250 bar to protect downstream plumbing. Internal pilot oil supply, coded E, eliminates the need for a separate pilot line and simplifies piping on compact power units. An IP65 protection class seals the housing against dust and low-pressure water jets, making the valve suitable for machinery exposed to wash-down or outdoor splashes. Thermal endurance reaches 150 °C at the coil, enabling extended duty cycles without overheating in hot ambient environments or closed cabinets. These pressure, pilot, sealing, and temperature limits combine with the flow ratings presented earlier to define safe operating margins for servo-controlled hydraulic positioning systems.
Technical Specifications
Actual Value Output
±10 V
Command Input
±10 V
Current Consumption (maximum)
1.6 A
Flow Characteristic
Linear With Fine Control (P)
Max Coil Temperature
150 °C
Max Operating Pressure (p, A, B)
350 bar
Mounting Interface
ISO 4401-08-08-0-05
Nominal Size
NG25
Pilot Oil Supply
Internal (E)
Port T Return Pressure (external)
250 bar
Protection Class
IP65
Rated Flow (Δp=5 Bar/control Edge)
350 l/min
Supply Voltage (nominal)
24 V DC
Voltage Lower Limit
18 V DC
Voltage Upper Limit
35 V DC
Weight
16.8 kg
1620 Old Apex Road
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