Proportional Directional Valve 4WRZE25E325-7X/6EG24N9EK31/F1M - Bosch Rexroth R901147386

Moving a large cylinder fast and then holding it on position asks for flow and fine resolution from the same valve. The 4WRZE25 with spool symbol E provides 325 l/min nominal flow at 350 bar operating pressure, taking pilot oil internally while the pilot oil return is routed externally.

Benefits

• 325 l/min nominal flow and up to 870 l/min peak flow cover rapid traverse on large cylinder areas.
• 350 bar operating pressure leaves headroom in systems rated for 280 bar.
• 4...20 mA current command instead of a voltage signal, so voltage drop on long cables does not shift the setpoint.
• On-board electronics replace the amplifier card in the cabinet and the matching work that goes with it.
• Internal pilot oil supply with external return saves one control line compared with the fully external version.
• ISO 4401-08-08-0-05 interface fits existing size 25 subplates.

Applications

Typical duties are hydraulic presses, test benches and injection moulding machines where a large cylinder passes from rapid traverse into a controlled phase. NBR seals and the release for HL hydraulic fluid suit mineral oil systems in the usual temperature range. At 20.12 kg a lifting aid is sensible when the valve is exchanged.

Manufacturer

The manufacturer is Bosch Rexroth, material number R901147386. Characteristic curves and installation dimensions are given in data sheet RE 29115 and RE 07600-B.