Proportional Directional Valve 4WRZ25E220-7X/6EG24N9K4/D3V - Bosch Rexroth R900971595

A plant keeps a separate filtered circuit for its pilot stage, and the large directional valve should hang on it. The 4WRZ25E220-7X/6EG24N9K4/D3V takes its pilot oil externally and returns it externally while metering 220 l/min of rated flow.

Benefits

• Rated flow of 220 l/min in size 25, with up to 870 l/min across the valve.
• External pilot oil supply and external pilot oil return on the pilot-operated main stage.
• Spool symbol E with three switching positions across four ports.
• External electronics on an amplifier card, valve wiring through a 7-pole connector (6 + PE).
• 20.86 kg, FKM seals, operating pressure up to 350 bar, connection diagram ISO 4401-08-08-0-05.

Applications

Separate pilot circuits are found in presses and test benches whose main pressure varies widely. With supply and return both external, the pilot stage stays clear of those swings. Closed loop control is handled by an amplifier card in the cabinet.

Manufacturer

Bosch Rexroth lists this valve under material number R900971595, product family 4WRZ(E). Further data is given in datasheet Proportional directional valve, pilot-operated (RE 29115) and Hydraulic valves and hydro- (RE 07600-B).