Proportional Directional Valve 4WRZE25E325-7X/6EG24N9EK31/F1D3M - Bosch Rexroth R901204540

A repeatable step response depends on the pilot pressure being the same on every stroke. The pressure reducing valve in the pilot line takes care of that while the main stage moves 325 l/min with spool symbol E and follows a 4...20 mA current command.

Benefits

• Constant pilot pressure from the built-in reducing stage, independent of the load pressure in the main channel.
• Internal supply with external drain Y keeps the null position free of tank pressure.
• Nominal flow 325 l/min, maximum flow 870 l/min, operating pressure up to 350 bar.
• Current command 4...20 mA suits long cable routes between control room and machine.
• Spool symbol E, on-board electronics on 24 VDC, mass 20.66 kg.

Applications

This behaviour is asked for in plants with tight timing, such as cycling presses, test rigs running load cycles and machines with path control. Pilot pressure stays the same across the cycle, which makes tuning the loop easier. The pilot drain is routed to tank without pressure.

Manufacturer

Bosch Rexroth builds this valve under material number R901204540. 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.