Proportional Directional Valve 4WRZ25E1-220-7X/6EG24N9EK4/M - Bosch Rexroth R901295416

Back pressure in the tank line distorts pilot pressure and with it the control behaviour. The 4WRZ25E1-220-7X/6EG24N9EK4/M avoids that with an external pilot oil return while the supply comes internally from the main circuit, and it controls 220 l/min nominal flow.

Benefits

• External pilot drain through the Y line, the pilot circuit stays clear of tank line back pressure.
• Internal supply from the main circuit, no separate X line is required.
• 220 l/min nominal flow, peaks up to 870 l/min, spool symbol E1 in size 25.
• Concealed auxiliary actuation, the axis can be moved without electronics and is protected against accidental operation.
• 350 bar maximum operating pressure, 18.2 kg weight, NBR seals and HL hydraulic fluid.

Applications

Typical installations are power units with a shared return manifold where several consumers discharge at the same time. Pressure in the tank channel then rises briefly, and the external Y line keeps the pilot circuit out of it. Concealed auxiliary actuation allows the axis to be checked during commissioning.

Manufacturer

Bosch Rexroth, material number R901295416. Permitted back pressure in the Y line and the characteristic curves are given in data sheet RE 29115, with RE 07600-B as a supplement.