Proportional Directional Valve 4WRZE25W8-325-7X/6EG24N9EK31/F1D3V - Bosch Rexroth R900949756

Two disturbances often meet in large plants: voltage drop on long signal cables and back pressure in the shared return. This size 25 variant answers the first with a 4 to 20 mA current command and the second with a separated control-oil drain, at 325 l/min nominal flow.

Benefits

• 4 to 20 mA current command, so the setpoint stays undistorted over the whole cable length.
• External pilot oil return, so return pressure has no influence on the pilot stage.
• Internal control-oil take-off from the main circuit, which runs at up to 350 bar.
• 325 l/min nominal flow, flow up to 870 l/min, spool symbol W8.
• 24 VDC supply, FKM seals, weight 20.64 kg, ISO 4401-08-08-0-05.

Applications

The build is intended for widely spread plants such as rolling mill hydraulics, large presses and test fields with a central control room. The control-oil drain runs on its own to tank. The current interface avoids equalising conductors between ground points.

Manufacturer

Bosch Rexroth, material number R900949756. Product family 4WRZ(E), pilot-operated spool valve with concealed manual override. Further details are given in data sheets RE 29115 and RE 07600-B.