Proportional Directional Valve 4WRKE25W8-220L-3X/6EG24K31/A1D3V - Bosch Rexroth R901305544

An accumulator circuit travels between charge and discharge pressure, and a valve should respond the same way across that band. This size 25 model separates the pilot stage completely through X and Y while metering 220 l/min nominal flow.

Benefits

• External pilot oil supply through X holds pilot pressure steady even as the accumulator discharges.
• External return through Y stops tank back pressure from shifting the null position.
• 220 l/min nominal flow, peak flow up to 870 l/min, operating pressure up to 350 bar.
• ±10 V command value at the on-board electronics, supply voltage 24 VDC.
• FKM seals, interface ISO 4401-08-08-0-05, weight 18.06 kg.

Applications

Applications are accumulator circuits on presses, emergency lowering functions and systems with strongly varying demand. Because pilot pressure comes from its own source, the axis stays controllable as accumulator pressure falls. Both extra lines have to be planned into the subplate.

Manufacturer

Bosch Rexroth lists the valve as R901305544, product family 4WRKE, size 25.