Proportional Directional Valve 4WRZE32W8-520-7X/6EG24N9K31/A1V - Bosch Rexroth R978021298

Where pilot oil comes from a separate circuit and returns to it, the main stage has to route supply and drain externally. The 4WRZE32W8-520-7X/6EG24N9K31/A1V does exactly that: a pilot-operated proportional directional valve in size 32 for 520 l/min nominal flow and 350 bar, with external pilot oil supply and external pilot oil return.

Benefits

• External pilot oil supply and external pilot oil return keep the pilot stage clear of back pressure in the tank line.
• 520 l/min nominal flow, up to 1600 l/min maximum, operating pressure up to 350 bar.
• ±10 V command value into the on-board electronics, 24 VDC supply, 7-pole connector (6 + PE) to EN 175201-804.
• ISO 4401-10-09-0-05 mounting pattern, subplate mounting, four ports, three switching positions, spool symbol W8.
• FKM seals for HL hydraulic fluid, concealed manual override, weight 44 kg.

Technical data

Applications

A standard choice for large hydraulic systems with a central pilot station: presses, injection moulding machines, test rigs and metallurgical plant where several main valves share one pilot supply. The valve bolts onto an ISO 4401-10-09-0-05 subplate and follows a voltage output from the machine controller.

Manufacturer

Bosch Rexroth lists this valve under material number R978021298. Characteristic curves and installation dimensions are given in data sheet RE 29115, RE 07600-B.