Proportional Directional Valve 4WRKE25E220L-3X/6EG24K31/A1D3M - Bosch Rexroth R900777269

A test rig runs its setpoints against a working pressure that changes constantly, and pilot pressure should stay untouched by it. The 4WRKE25E220L-3X/6EG24K31/A1D3M therefore draws all its pilot oil from an external circuit and meters 220 l/min nominal flow at 350 bar.

Key benefits

• External pilot oil supply and external return, pilot pressure does not follow working pressure.
• 220 l/min nominal flow in size 25, maximum flow 870 l/min.
• Plus minus 10 V command, 24 VDC supply, electronics integrated in the valve.
• Spool symbol E, 3 switching positions, 4 ports, connection pattern ISO 4401-08-08-0-05.
• Internal spool position feedback for a linear characteristic curve across the signal range.
• 17.94 kg weight, NBR seals for HL hydraulic fluid, 7-pole connector (6 + PE).

Applications

The variant serves material and component test rigs as well as presses with a separate pilot circuit. Because pilot pressure stays constant, the step response does not change with load pressure. 220 l/min nominal flow is enough for test cylinders of medium piston area.

Manufacturer

Bosch Rexroth, material number R900777269. The type code 4WRKE25E220L-3X/6EG24K31/A1D3M states size 25, spool symbol E, 220 l/min nominal flow and series 3X.