Proportional Directional Valve 4WRZ25E220-7X/6EG24N9K4/V - Bosch Rexroth R900973420

Full separation of main and pilot circuits makes control behaviour independent of the load. The 4WRZ25E220-7X/6EG24N9K4/V feeds pilot oil in externally and drains it externally while metering 220 l/min nominal flow.

Benefits

• External pilot supply and external drain, pilot pressure does not follow load pressure.
• 220 l/min nominal flow in size 25, with peaks up to 870 l/min.
• No internal pressure reducing valve, pilot pressure is set on the plant side.
• FKM seals, 18.2 kg weight, spool symbol E across 4 ports.
• 350 bar maximum operating pressure, control at 24 VDC through external electronics.

Applications

The valve is applied on axes whose load pressure swings widely, for instance feed drives with changing tool engagement. Its separate pilot circuit keeps the step response equal throughout the cycle. Concealed auxiliary actuation assists during setup.

Manufacturer

Bosch Rexroth, material number R900973420. Characteristic curves, step response and installation dimensions appear in data sheet RE 29115, supplemented by catalogue RE 07600-B.