Proportional Directional Valve 4WRZE25E1-325-7X/6EG24N9ETK31/F1D3V - Bosch Rexroth R901178304

A large axis running proportionally needs flow plus a command signal that survives a long cable run. This size 25 valve of the 4WRZE range delivers 325 l/min nominal flow at operating pressures up to 350 bar and accepts its command value as an impressed current of 4 to 20 mA, which a voltage drop along the cable cannot falsify.

Benefits

• 325 l/min nominal flow, with up to 870 l/min possible through the valve.
• Operating pressure up to 350 bar on the ISO 4401-08-08-0-05 mounting pattern.
• Command value 4 to 20 mA, immune to interference even over a long cable between cabinet and valve.
• Internal pilot oil supply plus internal pilot oil return, so external control-oil ports are not needed.
• Pressure reducing valve integrated in the pilot stage keeps pilot pressure limited while the main circuit runs at 350 bar.
• On-board electronics for 24 VDC, spool symbol E1, weight 20.68 kg.

Applications

Typical installations are presses, injection moulding machines and test benches where a large cylinder axis is accelerated and braked under control. Internal piloting assumes that the main circuit always carries enough pressure to draw control oil from. The concealed manual override lets the axis be moved when the electronics have failed.

Manufacturer

Bosch Rexroth, material number R901178304. Pilot-operated 4/3 proportional directional valve of the 4WRZ(E) product family, FKM seals, HL hydraulic fluid, subplate mounting. Further details are given in data sheets RE 29115 and RE 07600-B.