Proportional Directional Valve 4WRZ25W6-220-7X/6EG24ETK4/V - Bosch Rexroth R978908323

Tying a proportional axis into an existing manifold is quicker when the pilot oil comes from the main circuit and drains through the same tank channel. That is how the 4WRZ25W6-220-7X/6EG24ETK4/V is plumbed, and it controls 220 l/min nominal flow.

Benefits

• Internal pilot oil supply and internal return, the valve needs no separately routed X and Y line.
• 220 l/min nominal flow, up to 870 l/min flow, spool symbol W6 in size 25.
• FKM seals with HL hydraulic fluid, operation up to 350 bar maximum operating pressure.
• 18.2 kg weight on the ISO 4401-08-08-0-05 pattern, four ports and three switching positions.
• Commanded by an external amplifier at 24 VDC through a 7-pole (6 + PE) plug to EN 175201-804.

Technical data

Applications

The valve serves presses, injection moulding machines and test rigs where an axis is accelerated and slowed down under control. Because pilot supply and return stay inside the valve, piping work on the manifold drops. Pilot pressure has to be delivered by the main circuit within the permitted range, since this version carries no pressure reducing valve in the pilot stage.

Manufacturer

Bosch Rexroth, material number R978908323. Characteristic curves and pilot oil demand are given in data sheet RE 29115, the range overview in RE 07600-B.