Proportional Directional Valve 4WRZ25W8-325-7X/6EG24N9EK4/M - Bosch Rexroth R900975643

Large flows build back pressure in a return line carrying a cooler and a return filter, and that affects pilot control. The 4WRZ25W8-325-7X/6EG24N9EK4/M therefore drains pilot oil through a dedicated Y line and controls 325 l/min nominal flow.

Benefits

• External pilot drain, cooler and return filter do not affect pilot control.
• Internal supply from the main circuit, a separate X line is dropped.
• 325 l/min nominal flow, flow up to 870 l/min, spool symbol W8.
• 19.78 kg weight in size 25, 350 bar maximum operating pressure, NBR seals.
• Concealed auxiliary actuation and control at 24 VDC through an external amplifier.

Applications

Typical plants are presses and power units with return cooling where rapid traverse loads the return path. The separate Y line carries pilot oil into the tank without pressure. Control behaviour then stays the same across the whole cycle.

Manufacturer

Bosch Rexroth, material number R900975643. Permitted back pressure in the Y line is given in data sheet RE 29115, and the range is described in RE 07600-B.