Proportional Directional Valve 4WRZE32W8-520-7X/6EG24N9EK31/A1D3M - Bosch Rexroth R901116971

Back pressure in the tank line makes a separate pilot oil return necessary, which is what this version provides alongside 520 l/min nominal flow and internal pilot oil pickup.

Key benefits

• 520 l/min nominal flow within a permissible 1600 l/min maximum flow, enough for large press cylinders.
• Internal pilot oil supply saves the X line, while the external pilot oil return stays independent of tank back pressure.
• Spool symbol W8 in 3 switching positions across 4 ports, matching interface ISO 4401-10-09-0-05.
• ±10 V command value on a 24 VDC supply, the electronics sit on the valve body.
• Integrated pressure reducing valve steadies pilot pressure up to 350 bar operating pressure, total mass is 43.95 kg.

Applications

This combination is asked for in forming presses, baling presses and scrap shears, where coolers and filters build up counter pressure in the tank line. Internal pilot pickup keeps piping work down. HL hydraulic fluid is specified, seals are NBR.

Manufacturer

Bosch Rexroth, material number R901116971 from product family 4WRZ(E). Data sheet RE 29115 documents characteristic curves and pilot oil variants, RE 07600-B carries the general information on hydraulic valves.