Proportional Directional Valve 4WRZE25W8-220-7X/6EG24N9TK31/A1D3M - Bosch Rexroth R901141018

During the cut, pressure in the working circuit collapses within milliseconds, and the pilot stage must not notice. The 4WRZE25W8-220-7X/6EG24N9TK31/A1D3M therefore takes pilot oil from outside, returns it internally and meters 220 l/min nominal flow with a ±10 V command value.

Benefits

• External pilot oil supply keeps control free of pressure shocks during the cut.
• A ±10 V command value fits common analogue outputs without a signal converter.
• Nominal flow 220 l/min, maximum flow of the series 870 l/min.
• Spool symbol W8, 3 switching positions, 4 ports, connection diagram ISO 4401-08-08-0-05.
• Operating pressure 350 bar, NBR seals, weight 20.58 kg, UKCA to SI2016/1091.

Applications

The valve drives cutting and pressing cylinders in scrap shears, baling presses and shredders. The concealed manual override helps to free a jammed blade without control voltage. A pressure reducing valve in the pilot circuit limits pilot pressure independently of system pressure.

Manufacturer

Bosch Rexroth, material number R901141018. The technical basis is given in datasheets RE 29115 and RE 07600-B.