Proportional Directional Valve 4WRKE25W6-220L-3X/6EG24EK31/F1D3M - Bosch Rexroth R901041291

Not every installation carries a dedicated pilot pump, yet almost every one has back pressure in its tank line. The 4WRKE25W6-220L-3X/6EG24EK31/F1D3M therefore draws pilot oil internally and routes the pilot return externally, commanded by 4...20 mA to 220 l/min nominal flow.

Key benefits

• Internal pilot oil supply saves the second pump, the external return bypasses back pressure in the tank line.
• 220 l/min nominal flow at 350 bar maximum operating pressure, size 25 to ISO 4401-08-08-0-05.
• Spool symbol W6 with 3 switching positions and 4 ports, linear characteristic curve.
• A 4...20 mA current command feeds the on-board electronics, supplied with 24 VDC via a 7-pole connector (6 + PE).
• Internal spool position feedback, NBR seals for HL hydraulic fluid, 18.02 kg weight.

Applications

Hoists, hydraulic presses and machine tools whose power unit runs a single circuit are the usual home for this valve. Maximum flow of 870 l/min leaves headroom for short rapid strokes. Routing the pilot return separately keeps pilot control clear of back pressure from the shared tank channel.

Manufacturer

Bosch Rexroth, material number R901041291. The type code 4WRKE25W6-220L-3X/6EG24EK31/F1D3M reads as size 25, spool symbol W6, 220 l/min nominal flow and series 3X.