Proportional Directional Valve 4WRZE10W8-85-7X/6EG24N9K31/F1M - Bosch Rexroth R900741766

Wind energy and offshore hydraulics deliberately separate signal paths from pilot oil paths because service windows are rare. The 4WRZE10W8-85-7X/6EG24N9K31/F1M combines external pilot oil supply and external return with a 4...20 mA current command and regulates 85 l/min nominal flow through spool symbol W8.

Benefits

• External pilot oil supply and external return, cleanly separable from the main circuit.
• Current command 4...20 mA, a broken cable shows up as zero current.
• Spool symbol W8 with 85 l/min nominal flow, maximum flow 170 l/min.
• Version without pressure reducing valve, concealed auxiliary actuation on the pilot valve.
• Operating pressure up to 315 bar, size 10, weight 7.99 kg.

Applications

Pitch and brake hydraulics in wind turbines, offshore winches and cargo handling gear run for long periods without intervention. The separate pilot paths allow the pilot circuit to be filtered on its own. Connection diagram ISO 4401-05-05-0-05 keeps a valve change simple during service.

Manufacturer

The Bosch Rexroth material number is R900741766. Datasheet RE 29115 documents frequency response, pilot oil demand and port dimensions of 4WRZE10W8-85-7X/6EG24N9K31/F1M, RE 07600-B names the approved fluids.