Proportional Directional Valve 4WRZE25E220-7X/6EG24N9K31/A1D3M - Bosch Rexroth R900976047

Plants that hold an axis in position for hours load the pilot stage differently from cycling machines. This version with spool symbol E is fed and drained through separate X and Y lines and controls 220 l/min in service.

Benefits

• Separate control lines X and Y keep the pilot stage independent of the state of the working circuit.
• Pressure reducing valve in the pilot line holds pilot pressure steady even during long holding phases.
• Spool symbol E with a defined mid position, three switching positions.
• Nominal flow 220 l/min, operating pressure up to 350 bar, maximum flow 870 l/min.
• Plus/minus 10 V command, on-board electronics on 24 VDC, mass 20.6 kg.

Applications

Cases like this occur on weirs, locks, adjusting drives in hydro power plants and test rigs with long holding phases. Two adjustments are often separated by a long rest period in which pilot pressure and null point have to stay stable. The UKCA entry to SI2016/1091 covers electromagnetic compatibility.

Manufacturer

Bosch Rexroth builds this valve under material number R900976047. 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.