Proportional Directional Valve 4WRZ25W8-325-7X/6EG24N9TK4/V - Bosch Rexroth R901130789

On axes that spend part of the cycle at almost no load pressure, the P channel is no longer a reliable pilot source. The 4WRZ25W8-325-7X/6EG24N9TK4/V therefore draws pilot oil externally while returning it internally into the T channel, at 325 l/min nominal flow and 350 bar maximum operating pressure.

Benefits

• External pilot oil supply, internal pilot oil return, pilot pressure independent of working pressure in the P channel
• Spool symbol W8, 3 switching positions, 4 ports
• Nominal flow 325 l/min, up to 870 l/min at maximum
• Maximum operating pressure 350 bar, connection diagram ISO 4401-08-08-0-05
• Concealed auxiliary actuation, control at 24 VDC through external electronics
• FKM seals, weight 20.1 kg

Application

The valve suits axes with long rapid traverse phases at low load pressure, such as clamping units as well as feed cylinders. The external pilot source holds pilot pressure even when working pressure collapses. The internal return saves one line on the manifold.

Manufacturer

Bosch Rexroth, material number R901130789, type designation 4WRZ25W8-325-7X/6EG24N9TK4/V. Further values are given in the data sheet Proportional directional valve, pilot-operated (RE 29115) and Hydraulic valves and hydro- (RE 07600-B).