R901363311 DBEME30-7X/200YG24K31A1V German Rexroth original proportional relief valve

FAQ:

1. High Flow Capacity (NG30)

   The "30"​ in DBEME30​ indicates a NG30 (Size 30)​ valve. This is a large flow valve​ capable of handling up to 700 L/min​ (depending on pressure drop). It is suitable for use as the main system relief valve​ in high-power hydraulic systems.

2. External Pilot Drain (Y)

   The "Y"​ in the model code indicates external pilot drain. The pilot control oil drain (port Y) must be connected directly to tank with minimal backpressure. High backpressure at port Y will directly reduce the effective cracking pressure (P_effective = P_set - P_Y). This is critical for accurate pressure control.

3. Integrated Electronics (OBE)

   The "E"​ in DBEME​ confirms on-board electronics (OBE). This means the valve contains its own amplifier. You supply 24V DC power​ and the 0–10 V signal​ directly to the valve's K31 connector, eliminating the need for an external VT-5000 series amplifier.

4. Pressure Rating (200 bar)

   The "200"​ denotes the maximum electrically adjustable pressure rating​ of 200 bar. The valve's mechanical pressure limit is 350 bar, but the proportional control range is optimized for 0–200 bar. For higher proportional pressures (e.g., 315 bar), a different variant would be required.

5. Critical Installation Notes

   • No External Amplifier Needed:​ Connect 24V DC power and the 0–10 V signal directly to the valve.

   • Pilot Drain (Y) Connection:​ Port Y must be connected directly to tank with minimal backpressure. Do not connect it to a pressurized return line.

   • Large Size:​ As an NG30 valve, it requires a significantly larger mounting footprint and heavier subplate compared to NG6 valves.