Proportional Directional Valve 4WRZE25W6-220-7X/6EG24N9EK31/A1D3M - Bosch Rexroth R900771426

Bringing heavy cylinders and hydraulic motors up to speed smoothly and stopping them on position is the job here, and the W6 spool meters oil flow up to 220 l/min nominal instead of merely switching it. Size 25 releases up to 870 l/min inside the valve at an operating pressure of 350 bar.

Benefits

• Nominal flow 220 l/min, up to 870 l/min in the valve, port pattern ISO 4401-08-08-0-05
• On-board electronics accept the ±10 V command value directly, no separate amplifier needed
• Operating pressure up to 350 bar across all four ports, three switching positions
• Internal pilot oil supply with external return saves a dedicated feed line in the manifold
• Pressure reducing valve in the pilot circuit keeps pilot pressure independent of load pressure
• Connector, 7-pole (6 + PE) to EN 175201-804 on a 24 VDC supply

Application

The valve is at home in presses, test rigs and machine tools where a cylinder is decelerated out of rapid traverse and then positioned. A concealed auxiliary actuation lets the axis be moved while the machine is de-energised. Mounting is on a subplate to ISO 4401-08-08-0-05, running on HL hydraulic fluid with NBR seals.

Manufacturer

Bosch Rexroth lists this valve under material number R900771426. The manufacturer datasheet with characteristic curves, port pattern and installation dimensions is available in the download area of this page.