Proportional Directional Valve 4WRZ25E1-325-7X/6EG24N9K4/M - Bosch Rexroth R900977926

When pilot oil should neither come from the main circuit nor drain through the tank channel, the valve needs both lines led outside. The 4WRZ25E1-325-7X/6EG24N9K4/M has external supply and external return and controls 325 l/min nominal flow.

Benefits

• External supply and external return, the pilot circuit works independently of pressure and back pressure in the working circuit.
• 325 l/min nominal flow, up to 870 l/min flow, spool symbol E1.
• Size 25, ISO 4401-08-08-0-05 pattern, four ports, three switching positions.
• 20.04 kg weight, 350 bar maximum operating pressure, NBR seals and HL hydraulic fluid.
• Concealed auxiliary actuation, commanded at 24 VDC through an external amplifier.

Applications

This arrangement is common in plants with several controlled axes on a shared pilot supply. Pilot pressure and filtration grade are fixed centrally there, while the drain runs into the tank without pressure. The axes then behave evenly relative to each other.

Manufacturer

Bosch Rexroth, material number R900977926. Port dimensions of the X and Y lines and the characteristic curves are given in data sheet RE 29115, supplemented by RE 07600-B.