FAQ: Rexroth 3DREPE6C-2X/25EG24N9K31/A1V

What is this valve?​

It is a direct-operated, 3-way proportional pressure reducing valve with integrated electronics (OBE). It converts an electrical input signal into a precisely controlled, reduced hydraulic pressure for pilot or secondary circuits.

What are its key features?​

• Integrated Electronics (OBE):​ The amplifier is built into the solenoid, eliminating the need for an external amplifier card.

• 3-Way Function:​ Can reduce pressure (P→A/B) or relieve pressure (A/B→T) based on the solenoid actuation.

• High-Temp Seals:​ Equipped with FKM (Viton®) seals​ for use with phosphate ester fluids or in high-temperature environments.

• Manual Override:​ Includes a concealed manual override (N9) for testing or emergency operation without electrical power.

How does it work?​

The electrical command signal (±10V) controls the solenoid force. This force sets the reduced outlet pressure proportionally. When de-energized, the valve center position connects the outlet ports (A, B) to the tank (T) for safe pressure release.

Where is it typically used?​

Commonly used in low-pressure pilot circuits, clamping applications, and secondary circuit pressure regulation where precise, variable control and compact design are required (e.g., machine tools, test stands).

How do I wire it?​

• Power & Signal:​ Supply 24V DC and the ±10V command signal directly to the 7-pin connector on the valve (no external amplifier needed).

• Drain:​ Ensure the tank port (T) is connected directly to the reservoir with minimal backpressure.

What if the pressure is unstable or incorrect?​

• Verify the ±10V command signal is stable and within range.

• Check for contamination, as the small orifices in direct-acting valves are highly sensitive to dirt.

• Ensure the inlet pressure (P) is stable and significantly higher than the desired reduced pressure.

• Confirm the tank line (T) is not blocked and has low backpressure.