Proportional Directional Valve 4WRZE25W8-220-7X/6EG24N9EK31/A1D3M - Bosch Rexroth R900727881

An oversized spool gives away resolution in the fine range. The 4WRZE25W8-220-7X/6EG24N9EK31/A1D3M therefore stays at 220 l/min rated flow while keeping the same size 25 body plus the same subplate as the 325 version.

Benefits

• 220 l/min rated flow instead of 325 yields finer command resolution in part load.
• Operating pressure up to 350 bar, maximum flow of size 25 at 870 l/min.
• Internal pilot oil supply with external pilot return keeps the pilot stage clear of tank pressure.
• Command value plus minus 10 V, 24 V DC, 7-pole connector (6 + PE) to EN 175201-804, electronics right at the valve.
• Spool symbol W8, 3 switching positions, 4 ports, mounting pattern ISO 4401-08-08-0-05, 20.7 kg.

Applications

The version suits feed axes, tool adjustment drives, test cylinders whose demand stays clearly below 300 l/min. Since the mounting pattern matches the 325 version, the spool stage can be changed later without reworking the plate. Where the tank line carries standing back pressure, the external pilot return remains the safe route.

Manufacturer

Bosch Rexroth, material number R900727881. The type code 4WRZE25W8-220-7X/6EG24N9EK31/A1D3M stands for size 25, symbol W8, 220 l/min, pilot circuit A1D3M. Data sheet RE 29115 carries the curves, RE 07600-B the surrounding valve range.