Proportional Directional Valve 4WRZE25W9-220-7X/6EG24N9K31/A1D3M - Bosch Rexroth R900769050

A fully separated pilot circuit makes piloting independent of what happens in the working circuit. The 4WRZE25W9-220-7X/6EG24N9K31/A1D3M uses external supply and external return for that and controls 220 l/min nominal flow in size 25.

Benefits

• External pilot oil supply and external return, decoupling piloting from working pressure.
• 220 l/min nominal flow, 870 l/min maximum, operating pressure up to 350 bar.
• Pressure reducing valve in the pilot circuit limits pilot pressure to a constant value.
• Symbol W9 in three switching positions with concealed auxiliary actuation.
• Command value ±10 V DC, supply 24 V DC, weight 20.78 kg, NBR seals.

Applications

The valve controls axes in presses, test rigs and lifting gear whose power unit has its own pilot pump and a separate drain channel. That separation keeps pilot pressure constant even when working pressure swings heavily during the cycle. Mounting pattern ISO 4401-08-08-0-05 allows a direct swap within the range.

Manufacturer

Bosch Rexroth, material number R900769050. Data sheet RE 29115 lists characteristic curves and pilot oil demand, RE 07600-B holds general notes.