Proportional Directional Valve 4WRZ25W6-220-7X/6EG24K4/D3M - Bosch Rexroth R901049257

A pilot circuit that stays independent of the main flow keeps the pilot stage steady even when working pressure in the main channel drops. The 4WRZ25W6-220-7X/6EG24K4/D3M is built for that case: pilot oil supply and return are both external, while the main channel carries 220 l/min nominal flow.

Benefits

• 220 l/min nominal flow, up to 870 l/min peak flow in size 25 on the ISO 4401-08-08-0-05 pattern.
• Pilot oil fed in and drained externally, so the pilot stage works independently of main channel pressure.
• 350 bar maximum operating pressure with NBR seals and HL hydraulic fluid.
• Spool symbol W6, three switching positions across four ports for continuous control of direction and volume.
• 24 VDC through a 7-pole (6 + PE) plug to EN 175201-804, commanded by external electronics.

Technical data

Applications

The valve serves presses, injection moulding machines and test rigs whose axes have to accelerate gently and stop at a defined point. The external pilot circuit can be fed by a dedicated pilot pump or by the plant control pressure. In service work it takes the place of identical valves of the same pilot oil variant.

Manufacturer

Bosch Rexroth, material number R901049257. Characteristic curves, pilot oil demand and installation dimensions are given in data sheet RE 29115.