Proportional Directional Valve 4WRZE25W8-325-7X/6EG24N9EK31/A1M - Bosch Rexroth R900770269

During commissioning the control voltage is often not there yet, while the axis already has to move. This 4WRZE25 carries a concealed auxiliary actuation for exactly that, moves 325 l/min with spool symbol W8 in service and then follows a plus/minus 10 V command.

Benefits

• Concealed auxiliary actuation on the pilot stage lets the axis be moved without control voltage.
• Nominal flow of 325 l/min with a maximum of 870 l/min and 350 bar operating pressure.
• Internal pilot oil supply with external drain Y keeps the null position free of tank pressure.
• Plus/minus 10 V command into the on-board electronics, 24 VDC supply.
• Three switching positions, four ports, NBR seals, mass 20.28 kg.

Technical data

Applications

The valve is fitted to main axes of presses and rolling stands that have to be driven by hand during assembly and maintenance. In normal service the controller takes over the setpoint. The UKCA entry to SI2016/1091 documents electromagnetic compatibility.

Manufacturer

Bosch Rexroth builds this valve under material number R900770269. Quote that number when ordering and keep it in the spare parts list of the machine. Characteristic curves, installation dimensions and connection diagrams are in data sheet RE 29115 and RE 07600-B.