Proportional Directional Valve 4WRZ25W9-220-7X/6EG24N9EK4/D3M - Bosch Rexroth R901462219

A large cylinder should accelerate steplessly although the manifold provides no separate pilot supply port. The 4WRZ25W9-220-7X/6EG24N9EK4/D3M takes its pilot oil internally and returns it externally, at 220 l/min nominal flow in size 25.

Benefits

• Nominal flow 220 l/min in size 25, flow up to 870 l/min.
• Spool symbol W9 with three switching positions across four ports.
• Internal pilot oil supply, External pilot oil return, fixed in the type code.
• Integrated pressure reducing valve keeps the pilot stage at constant pressure.
• Concealed auxiliary actuation for commissioning without a control signal.
• 350 bar operating pressure, 20.44 kg, NBR seals, connection diagram ISO 4401-08-08-0-05.

Applications

The valve controls large cylinders and hydraulic motors where the flow of a direct actuated valve is no longer enough. Presses, rolling mills and test benches with high oil demand are typical places. The control electronics sit in the cabinet and can be parametrised centrally there.

Manufacturer

Bosch Rexroth lists this valve under material number R901462219. Characteristic curves, installation dimensions and tightening torques are in data sheet RE 29115.