Proportional Directional Valve 4WRZE25W8-220-7X/6EG24N9EK31/A1M - Bosch Rexroth R900770268

An axis whose controller puts out ±10 V can be driven straight from this pilot-operated proportional directional valve in size 25. The on-board electronics sit on the valve itself, nominal flow is 220 l/min and the maximum operating pressure is 350 bar.

Benefits

• On-board electronics take the ±10 V command value on a 24 VDC supply, wired through a 7-pole connector (6 + PE) according to EN 175201-804.
• 220 l/min nominal flow, maximum flow 870 l/min.
• Maximum operating pressure 350 bar across 3 switching positions and 4 ports.
• Interface pattern ISO 4401-08-08-0-05 for size 25, weight 20.1 kg.
• Spool symbol W8, internal pilot oil supply with external pilot oil return.
• UKCA conformity including electromagnetic compatibility (EMC) SI2016/1091, NBR seals for HL hydraulic fluid.

Applications

The valve sets direction and speed for large cylinders and hydraulic motors in presses, injection moulding machines and test rigs. Pilot oil is taken internally from the main circuit, so the external pilot drain needs its own unpressurised line back to the tank. A concealed auxiliary actuation lets the axis be moved when the electrical command is absent.

Manufacturer

Bosch Rexroth lists the valve under material number R900770268. Characteristic curves, installation dimensions and interface patterns are given in data sheets RE 29115 and RE 07600-B.