Proportional Directional Valve 4WRZE25W8-220-7X/6EG24N9TK31/F1D3V - Bosch Rexroth R901145310

In circuits whose pressure collapses during the cycle, pilot oil has to come from its own constantly supplied source. That is what this version is built for: external pilot oil supply with internal return, 220 l/min nominal flow and operating pressure up to 350 bar in size 25.

Benefits

• External pilot oil supply keeps the valve able to shift even when main pressure of 350 bar breaks down.
• Internal pilot oil return, which saves one line compared with a fully external version.
• 220 l/min nominal flow in size 25, up to 870 l/min possible through the valve.
• Spool symbol W8 with 3 switching positions and 4 ports to ISO 4401-08-08-0-05.
• Command value 4 to 20 mA over a 7-pole connector (6 + PE) to EN 175201-804, 24 VDC supply.
• FKM seals for HL hydraulic fluid, weight 20.68 kg.

Applications

The version suits presses and injection moulding machines with an accumulator circuit or a separate pilot pump. The return goes into the tank port of the valve, so only the external supply line has to be routed. At 220 l/min nominal flow the spool resolves finer than the 325 l/min version does.

Manufacturer

Bosch Rexroth, material number R901145310. Pilot-operated proportional directional valve of the 4WRZ(E) product family with on-board electronics and concealed manual override. Further details are given in data sheets RE 29115 and RE 07600-B.