Proportional Directional Valve 4WRZ25E325-7X/6EG24EK4/D3M - Bosch Rexroth R901266853

A back pressure valve in the return keeps the circuit filled but loads the tank channel permanently. The 4WRZ25E325-7X/6EG24EK4/D3M therefore drains its pilot oil through a dedicated Y line, taps it internally through a pressure reducing valve and controls 325 l/min nominal flow.

Benefits

• External pilot drain through Y, the holding pressure in the return does not act on pilot control.
• Internal tapping with pressure reducing valve, an X line is dropped.
• 325 l/min nominal flow, flow up to 870 l/min, spool symbol E in size 25.
• 18.2 kg weight, 350 bar maximum operating pressure, ISO 4401-08-08-0-05 pattern.
• Commanded at 24 VDC through an external amplifier, 7-pole (6 + PE) plug to EN 175201-804.

Applications

Back pressure valves in the return are found on plants with a preloaded circuit, for example hydrostatic drives and systems with a filter and cooling loop. The Y line provides an unpressurised drain for the pilot stage there. The working circuit keeps its preload.

Manufacturer

Bosch Rexroth, material number R901266853. Permitted back pressure in the Y line and the reduced pilot pressure are given in data sheet RE 29115, range overview in RE 07600-B.