Proportional Directional Valve 4WRZ25W8-220-7X/6EG24EK4/M - Bosch Rexroth R900725325

When several machines feed the same return line, its pressure changes continuously. The 4WRZ25W8-220-7X/6EG24EK4/M therefore drains its pilot oil through a dedicated Y line, takes it internally from the main circuit and controls 220 l/min nominal flow.

Benefits

• Dedicated Y line, changing pressure in the shared return does not act on pilot control.
• Internal supply, no additional X line has to be routed.
• 220 l/min nominal flow, flow up to 870 l/min, spool symbol W8 in size 25.
• 20.2 kg weight, 350 bar maximum operating pressure, four ports, three switching positions.
• NBR seals, HL hydraulic fluid, 24 VDC through a 7-pole (6 + PE) plug to EN 175201-804.

Applications

Return conditions like these arise in production lines where several power units work into one common reservoir. The separate Y line takes pilot oil straight to the reservoir. The working return may keep using the collecting line.

Manufacturer

Bosch Rexroth, material number R900725325. Permitted back pressure in the Y line and the characteristic curves are given in data sheet RE 29115, supplemented by RE 07600-B.