Proportional Directional Valve 4WRZ25W8-220-7X/6EG24N9TK4/D3M - Bosch Rexroth R900772289

The 4WRZ25W8-220-7X/6EG24N9TK4/D3M receives its pilot oil through a supply line of its own and releases it internally into the tank channel. The valve therefore stays able to switch even when the main circuit is unpressurised, at a nominal flow of 220 l/min.

Benefits

• External pilot oil supply, internal return, able to switch even with an unpressurised main channel.
• Nominal flow 220 l/min, maximum flow 870 l/min at 350 bar.
• Spool symbol W8, pilot-operated spool valve with 3 switching positions.
• Integrated pressure reducing valve sets pilot pressure independently of system pressure.
• 20.46 kg, NBR seals, external electronics, connection diagram ISO 4401-08-08-0-05.

Applications

This variant suits circuits with accumulator operation or with system pressure that drops under load. A separate pilot circuit supplies the pilot stage independently. The pilot oil return uses the existing tank channel and saves a second line.

Manufacturer

The manufacturer is Bosch Rexroth, material number R900772289, product family 4WRZ(E). Data sheet RE 29115 describes the pilot oil variants and characteristic curves, RE 07600-B places the series.