Proportional Directional Valve 4WRTE25E1-220L-4X/6EG24K31/F1M - Bosch Rexroth R900979855

After a cold start the oil is thick and an axis without position feedback responds later than it does when warm. This 4WRTE controls spool position internally and therefore stays predictable across the whole temperature range, at 220 l/min nominal flow and 350 bar.

Benefits

• Internal position control keeps the response largely independent of oil viscosity.
• 220 l/min nominal flow at 350 bar, maximum flow 870 l/min.
• External pilot supply and external return keep the pilot stage steadily fed.
• Linear characteristic with a 4...20 mA command, insensitive to long cable runs.
• 18.02 kg, ISO 4401-08-08-0-05 connection diagram, 24 VDC supply.

Applications

The valve is used on plants with frequent standstills and cold starts, such as workshop presses, test equipment in shift operation and special machines. The on-board electronics sit directly on the valve and need no slot in the control cabinet. HL hydraulic fluid with NBR seals is used.

Manufacturer

Genuine Bosch Rexroth part, material number R900979855.