R901325506 DREME20-6X/315YG24K31A1M Proportional relief valve made by Rexroth in Germany

FAQ:

1. Integrated Electronics (OBE)

   The "E"​ in DREME​ confirms On-Board Electronics (OBE). This means the valve contains its own amplifier. You supply 24V DC power​ and a 0–10 V command signal​ directly to the valve's K31 connector. This simplifies wiring and eliminates the need for an external VT-VSPA amplifier.

2. No Mechanical Maximum Pressure Limiter

   Unlike the previous models you inquired about (which had an "M" code for a mechanical limiter), this variant (...YG24...) does not include a mechanical safety relief valve. The maximum pressure is solely controlled by the electronics. If your application requires a hard-wired hydraulic safety limit, you would need the ...YMG24...​ variant.

3. High Pressure & Flow Rating (315 bar / 300 L/min)

   The "315"​ denotes the maximum electrically adjustable reduced pressure​ at port A. This is the highest pressure variant​ in the DREME20 series, capable of handling flows up to 300 L/min, making it suitable for high-power industrial systems.

4. External Pilot Drain (Y)

   The "Y"​ indicates the pilot control oil must be drained externally via port Y. This port must be connected directly to the tank with minimal backpressure. High backpressure at Y will cause inaccurate pressure regulation.

5. Critical Installation Notes

   • Port Y Drain:​ Must be piped separately to tank​ with a line diameter ≥ 5 mm and length < 2.5 m to avoid backpressure issues.

   • Zero Signal Pressure:​ With a 0 V command signal, the valve maintains a minimum pressure of approximately 2 bar​ at port A.

   • Subplate:​ Requires an NG20 subplate according to ISO 5781-AG-10-2-A (e.g., Rexroth RE 45102 series).

Correction:​ Your description mentioned "proportional relief valve", but this model is specifically a proportional pressure reducing valve. It controls the downstream (A-port) pressure, not the system relief pressure.