Proportional Directional Valve 4WRZE25W8-325-7X/6EG24N9TK31/F1D3V - Bosch Rexroth R901117827

Large flows and a cycling main circuit sit badly with internal piloting. This size 25 valve therefore relies on an external pilot oil supply while delivering 325 l/min nominal flow, with up to 870 l/min possible through the valve.

Benefits

• 325 l/min nominal flow with up to 870 l/min passing through the valve.
• External piloting, independent of how main-circuit pressure of up to 350 bar behaves.
• Internal pilot oil return, which keeps piping on the manifold shorter.
• Spool symbol W8, 4 ports, 3 switching positions, connection diagram ISO 4401-08-08-0-05.
• Impressed current of 4 to 20 mA as command value, 24 VDC supply voltage.
• Weight 20.62 kg, FKM seals, UKCA conformity to SI2016/1091.

Applications

The version is built for forming presses, forging lines and large test cylinders with high oil demand in rapid traverse. External control oil usually comes from an accumulator or a small auxiliary pump. With the electronics de-energised, the spool can still be moved through the concealed manual override.

Manufacturer

Bosch Rexroth, material number R901117827. Product family 4WRZ(E), subplate mounting, HL hydraulic fluid, pressure reducing valve integrated in the pilot stage. Further details are given in data sheets RE 29115 and RE 07600-B.