Proportional Directional Valve 4WRKE25W8-220L-3X/6EG24EK31/A1D3M - Bosch Rexroth R901038659

Back pressure in the tank line distorts the pilot stage when pilot oil drains there. The 4WRKE25W8-220L-3X takes pilot pressure internally and routes the return through a separate Y port, so 220 l/min nominal flow at up to 350 bar can be metered reliably. The command value arrives as a ±10 V voltage.

Benefits

• Internal pilot oil supply, external pilot oil return through Y where tank back pressure occurs
• Spool symbol W8, three switching positions
• 220 l/min nominal flow, flow rate up to 870 l/min
• ±10 V command value at on-board electronics, 24 V DC
• 17.8 kg weight, operating pressure up to 350 bar

Applications

This situation arises often when coolers and return filters sit downstream of the valve or several consumers share one return. A separate Y drain keeps the characteristic curve repeatable. Typical applications are presses, lifting gear and test rigs.

Manufacturer

Bosch Rexroth, material number R901038659. The type code 4WRKE25W8-220L-3X/6EG24EK31/A1D3M defines size, spool symbol, pilot oil routing and command value type without ambiguity.