Proportional Directional Valve 4WRZ25W8-220-7X/6EG24N9K4/M - Bosch Rexroth R900969607

If pilot control is fed by a small pilot pump, the axis can still be moved while the main drive is stopped. The 4WRZ25W8-220-7X/6EG24N9K4/M is built with external supply and external return for that and controls 220 l/min nominal flow.

Benefits

• External supply through X, external drain through Y, the pilot circuit is fully separated from the working circuit.
• 220 l/min nominal flow, flow up to 870 l/min in size 25 with spool symbol W8.
• 20.22 kg weight, 350 bar maximum operating pressure, ISO 4401-08-08-0-05 pattern.
• Concealed auxiliary actuation for moving the axis without an amplifier signal.
• NBR seals, HL hydraulic fluid, commanded at 24 VDC through external electronics.

Applications

The version is used on plants where clamping, pilot control and lubrication come from one shared auxiliary circuit. That circuit runs at constant pressure with its own filtration grade, independent of working pressure. The external Y line returns pilot oil without pressure.

Manufacturer

Bosch Rexroth, material number R900969607. Pilot oil demand and port dimensions of the X and Y lines are given in data sheet RE 29115, with RE 07600-B for further reading.