Proportional Directional Valve 4WRZ25W8-220-7X/6EG24K4/D3M - Bosch Rexroth R900976329

Where a separate pilot power unit already exists, the main stage should hang on it rather than on working pressure. The 4WRZ25W8-220-7X is built for exactly that, pilot oil arrives externally and leaves externally, while 220 l/min nominal flow is metered.

Benefits

• 220 l/min nominal flow within a maximum flow of 870 l/min.
• Pilot oil fed in and drained externally, pilot pressure is decoupled from working pressure.
• 350 bar maximum operating pressure on the ISO 4401-08-08-0-05 interface in size 25.
• Spool symbol W8, 3 switching positions, plus an integrated pressure reducing valve in the pilot stage.
• 20.52 kg weight, NBR seals, supplied at 24 VDC through a 7-pole plug to EN 175201-804.

Applications

It pays off on test benches and press lines with a central pilot unit feeding several axes. The external pilot circuit holds pilot pressure steady even when working pressure collapses. In service it replaces the same pilot variant of the same series.

Manufacturer

Bosch Rexroth, material number R900976329. Characteristic curves, pilot oil demand and installation dimensions appear in data sheet RE 29115, overview in catalogue RE 07600-B.