Proportional Directional Valve 4WRZE25E1-325-7X/6EG24N9ETK31/F1M - Bosch Rexroth R901079934

Replacing a failed amplifier card in the cabinet is a good moment to move the electronics onto the valve. This 4WRZE25 carries them on board, needs only 24 VDC and a 4...20 mA current command, and delivers 325 l/min with spool symbol E1.

Benefits

• Electronics sit on the valve, so card slot, wiring and calibration disappear from the cabinet.
• Control with 4...20 mA means a lost signal shows up in the process control system as a value below 4 mA.
• Nominal flow 325 l/min, maximum flow 870 l/min, operating pressure up to 350 bar.
• Internal pilot oil supply and internal drain keep the plumbing limited to the main ports.
• Spool symbol E1, interface pattern ISO 4401-08-08-0-05, mass 20.26 kg, 7-pole connector (6 + PE).

Applications

The valve suits the modernisation of older plants in which amplifier cards and valves had to be maintained separately. In new builds the design saves cabinet space and shortens signal paths. The standard interface pattern makes it a straight swap for an existing size 25 valve.

Manufacturer

Bosch Rexroth builds this valve under material number R901079934. 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.