Proportional Directional Valve 4WRZ25W8-220-7X/6EG24N9ETK4/M - Bosch Rexroth R900978356

Where there is no space left beside the manifold for extra pipework, fully internal pilot operation helps. The 4WRZ25W8-220-7X/6EG24N9ETK4/M draws pilot oil from the main circuit, drains it into the tank channel and controls 220 l/min nominal flow.

Benefits

• Internal supply and internal return, connection is limited to the ISO 4401-08-08-0-05 pattern.
• Spool symbol W8 at 220 l/min nominal flow, flow up to 870 l/min.
• 20.06 kg weight in size 25, 350 bar maximum operating pressure.
• Concealed auxiliary actuation, protected against unintended adjustment during operation.
• 24 VDC through a 7-pole (6 + PE) plug to EN 175201-804, driven by an external amplifier.

Applications

The version suits conversions on existing power units where a switching valve is replaced by a controlled axis. The manifold keeps its drillings because neither an X nor a Y line is added. The main circuit has to hold pilot pressure within the permitted range.

Manufacturer

Bosch Rexroth, material number R900978356. Data sheet RE 29115 states the pilot pressure range and the characteristic curves, RE 07600-B places the valve within the range.