Proportional Directional Valve 4WRZE25E220-7X/6EG24N9EK31/A1D3M - Bosch Rexroth R900787901

A dedicated pilot pump costs space, energy and maintenance, and for 220 l/min at the consumer it rarely pays off. This version taps pilot oil internally, caps it with a pressure reducing valve and releases it through a dedicated Y line.

Benefits

• No separate pilot pump needed, the pilot stage is fed internally from the main channel.
• Pressure reducing valve in the pilot line although the main channel carries up to 350 bar.
• External drain Y keeps the null position clear of back pressure in the tank line.
• Flow rating 220 l/min with spool symbol E, maximum flow 870 l/min.
• Plus/minus 10 V command, on-board electronics on 24 VDC, mass 20.72 kg.

Applications

The layout suits stand-alone machines and smaller power units that should manage without a second pump circuit. A pressureless line to tank is enough for the pilot drain. The mounting face follows ISO 4401-08-08-0-05 for size 25.

Manufacturer

Bosch Rexroth builds this valve under material number R900787901. Quote that number when ordering and keep it in the spare parts list of the machine. Characteristic curves, installation dimensions and connection diagrams are in data sheet RE 29115 and RE 07600-B.