Proportional Directional Valve 4WRZ25W6-325-7X/6EG24N9K4/V - Bosch Rexroth R900944187

When the main pump rests during standby, an internally fed pilot stage lacks pressure. The 4WRZ25W6-325-7X/6EG24N9K4/V is built with an external feed and an external drain and therefore stays commandable.

Benefits

• External pilot feed and external drain, the valve can shift even without main pressure.
• 325 l/min nominal flow within a maximum flow of 870 l/min.
• Spool symbol W6, 3 switching positions in size 25, ISO 4401-08-08-0-05 interface.
• 19.88 kg weight, FKM seals, 350 bar maximum operating pressure.
• Concealed auxiliary actuation, control at 24 VDC through external electronics.

Applications

The valve serves plants with long standby phases, such as tool changers and clamping stations. A small pilot power unit holds pilot pressure while the main pump stays switched off. An internal pressure reducing valve is not included.

Manufacturer

Bosch Rexroth, material number R900944187. Characteristic curves, step response and installation dimensions appear in data sheet RE 29115, supplemented by catalogue RE 07600-B.