Proportional Directional Valve 4WRZE32W8-520-7X/6EG24N9EK31/F1D3V - Bosch Rexroth R900737232

Large cylinders need plenty of oil and a pilot stage that does not drift under load. This 4WRZE32W8-520-7X takes pilot oil internally but releases it externally, keeping pilot pressure constant at 520 l/min nominal flow.

Key benefits

• 520 l/min nominal flow and up to 1600 l/min for cylinders with a large swept volume.
• Internal supply with external return of the pilot stage, a compromise between little piping and stable control pressure.
• Operating pressure up to 350 bar, sealed with FKM for warm HL oil.
• Concealed auxiliary actuation for commissioning and emergency movement without a 24 VDC supply.
• Spool symbol W8, three switching positions, four ports, connection diagram ISO 4401-10-09-0-05.

Technical data

Applications

The valve is used on forging presses, sheet forming lines and large lifting axes with cylinders beyond 250 mm bore. The external pilot return keeps switching time constant even when the return line is loaded by a cooler and filter. Control runs through the integrated electronics without an additional control card.

Manufacturer

Bosch Rexroth, material number R900737232, type designation 4WRZE32W8-520-7X/6EG24N9EK31/F1D3V. Performance limit curves and dimensions are given in the data sheet Proportional directional valve, pilot-operated (RE 29115), supplemented by Hydraulic valves and hydro- (RE 07600-B). Weight 44 kg.