Proportional Directional Valve 4WRZE16W8-180-7X/6EG24N9EK31/F1D3M - Bosch Rexroth R901438101

Two disturbances meet in many plants: back pressure in the shared return line and electrical interference on the command line. This version of the 4WRZE16W8-180 answers both, draining the pilot stage externally through Y and accepting the command as a 4...20 mA current signal. Pilot oil itself comes internally from the P channel, so no extra pilot pump is needed.

Benefits

• External pilot drain keeps shared line back pressure away from the pilot stage.
• Command value 4...20 mA, robust against interference and voltage drop.
• 180 l/min nominal flow with a 460 l/min limit.
• Internal pilot supply from the P channel, no separate pilot power unit.
• Pressure reducing valve in the pilot stage, on-board electronics on the valve.
• Spool symbol W8, concealed manual override, weight 12.56 kg.

Applications

The valve is fitted to forming machines, steel industry power units and test rigs with a shared return line. Internal supply requires that system pressure never falls below the minimum pilot pressure during the cycle. Otherwise the version with external supply at X is the better choice.

Manufacturer

The Bosch Rexroth material number is R901438101. 2 manufacturer datasheets document step response, frequency response and mounting dimensions.