Proportional Directional Valve 4WRZ25W6-220-7X/6EG24EK4/D3M - Bosch Rexroth R900738167

Internal pilot supply with an external drain is the variant for circuits whose tank line is routed separately. The 4WRZ25W6-220-7X/6EG24EK4/D3M works that way with 220 l/min nominal flow in size 25 and keeps the pilot return clear of the main return.

Benefits

• Pilot oil supplied internally, drained externally, so the pilot return is not loaded by back pressure in the tank line.
• 220 l/min nominal flow, up to 870 l/min peak flow at 350 bar maximum operating pressure.
• 18.2 kg weight in size 25 on the ISO 4401-08-08-0-05 pattern.
• Spool symbol W6, three switching positions, four ports with NBR seals for HL hydraulic fluid.
• 24 VDC through a 7-pole (6 + PE) plug to EN 175201-804, controlled by external electronics.

Applications

The version is used on presses and forming lines where several pilot-operated valves feed one shared return manifold. The separate pilot drain stops back pressure in the main return from shifting the switching times. When replacing a unit, keep to the same pilot oil variant.

Manufacturer

Bosch Rexroth, material number R900738167. Characteristic curves, permissible pilot pressure and dimensions are given in data sheet RE 29115.