Proportional Directional Valve 4WRZE25E1-220-7X/6EG24N9K31/F1M - Bosch Rexroth R901225537

When the cabinet sits far away from the machine a current command is the safer choice, because 4...20 mA loses nothing over cable length and a broken wire shows up at once. This 4WRZE25 with symbol E1 works at 220 l/min nominal flow and receives its pilot oil externally.

Benefits

• The 4...20 mA current interface stays unambiguous over long cable runs and a signal loss is visible as a value below 4 mA.
• Nominal flow of 220 l/min for axes that do not need 325 l/min, while the peak stays at 870 l/min.
• External pilot oil supply and external drain let the pilot stage work independently of pressure and back pressure in the main circuit.
• Operating pressure up to 350 bar, three switching positions, four ports, NBR seals.
• On-board electronics on 24 VDC through a 7-pole connector (6 + PE), mass 20.4 kg.

Applications

The valve suits plants with a central cabinet and long cable routes, such as rolling mills, locks and test fields. External piloting requires a separate control circuit with X and Y lines. The UKCA marking to SI2016/1091 documents electromagnetic compatibility.

Manufacturer

Bosch Rexroth builds this valve under material number R901225537. 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.