FAQ: Rexroth 3DREP6C-2X/25EG24N9K4

What is this valve?​

It is a direct-acting, 3-way proportional pressure reducing valve. It reduces a higher inlet pressure to a precisely controlled lower outlet pressure that is proportional to the electrical input signal.

What are its key features?​

• Direct-Acting Design:​ Provides fast response for low-pressure regulation (up to 25 bar).

• 3-Way Function:​ Can reduce pressure (P→A) or relieve pressure (A→T) depending on the signal polarity.

• External Electronics:​ Requires an external amplifier card (e.g., VT-VSPA1) for operation.

How does it work?​

The electrical signal (e.g., ±10V) controls the solenoid force. This force balances against the outlet pressure, setting it proportionally. A positive signal typically sets pressure from P to A, while a negative signal can relieve pressure from A to T.

Where is it typically used?​

Commonly used in low-pressure pilot circuits, clamping applications, and secondary circuit pressure regulation where precise, variable control is needed.

How do I wire it?​

• Power:​ 24V DC to the external amplifier.

• Signal:​ Connect the ±10V command signal to the amplifier inputs.

• Valve:​ Connect the valve coil to the amplifier output (3-pole connector).

What if the pressure is unstable?​

• Ensure the external amplifier is correctly configured and powered.

• Check for contamination, as small orifices are sensitive to dirt.

• Verify that the inlet pressure is stable and significantly higher than the desired reduced pressure.