Proportional Directional Valve 4WRZ10W8-85-7X/6EG24N9EK4/M - Bosch Rexroth R900732455

High back pressure in the tank channel shifts the characteristic of the pilot stage. The 4WRZ10W8-85-7X/6EG24N9EK4/M therefore takes its pilot oil internally but drains it externally, working at 85 l/min nominal flow.

Benefits

• Internal pilot supply, external pilot drain, the pilot return stays clear of tank back pressure.
• 85 l/min nominal flow, up to 170 l/min in the main channel of size 10.
• Spool symbol W8, 3 switching positions, ISO 4401-05-05-0-05 pattern.
• 315 bar operating pressure at 7.78 kg, NBR seals for HL hydraulic fluid.
• Concealed manual override and a 7-pole (6 + PE) plug to EN 175201-804.

Applications

This version belongs in systems with long return runs or return filters, where noticeable back pressure builds up in the tank channel. The separately routed pilot drain keeps the pilot stage clear of it, while supply comes from the pressure channel without an extra pump. The valve is used on feed axes, die cushions and test cylinders.

Manufacturer

Bosch Rexroth lists this item under material number R900732455, product family 4WRZ(E). Characteristic curves, limit values and mounting dimensions are given in datasheet Proportional directional valve, pilot-operated (RE 29115) and Hydraulic valves and hydro- (RE 07600-B).