Proportional Directional Valve 4WRZE25W8-220-7X/6EG24K31/F1D3M - Bosch Rexroth R901003039

When the machine feeds pilot oil from a separate circuit, both pilot paths have to leave the valve. The 4WRZE25W8-220-7X/6EG24K31/F1D3M routes X and Y externally and keeps the pilot pressure steady through a built-in pressure reducing valve, while the main stage moves 220 l/min nominal flow at up to 350 bar.

Benefits

• Nominal flow 220 l/min and max. flow 870 l/min in size 25
• Pressure reducing valve in the pilot circuit keeps pilot pressure steady when system pressure varies
• External pilot oil supply and external pilot oil return through separate X and Y lines
• Command value 4...20 mA at the on-board electronics, 24 VDC supply
• Mounting pattern ISO 4401-08-08-0-05, spool symbol W8, three switching positions, four ports
• NBR seals for HL hydraulic fluid, operating pressure up to 350 bar, 20.88 kg

Applications

A fit wherever pilot pressure comes from its own pump or an accumulator and has to stay independent of working pressure. Power units serving several consumers, where system pressure swings across the cycle, are the usual case. The manifold needs X and Y channels for this. The current interface keeps the command line insensitive to interference inside the cable duct.

Manufacturer

Bosch Rexroth, material number R901003039. Pilot pressure data, characteristic curves and installation dimensions are in the data sheet Proportional directional valve, pilot-operated (RE 29115), with a series overview in Hydraulic valves and hydro- (RE 07600-B).