Proportional Directional Valve 4WRDE25V1N350L-6X/MXY/24F1 - Bosch Rexroth R901579109

Without spool position feedback a pilot-operated valve always keeps some hysteresis. The 4WRDE25V1N350L-6X measures the position of its main stage internally and controls it out, at 350 l/min nominal flow and a flow of up to 870 l/min.

Key benefits

• Internal spool position feedback, giving high repeatability of the opening position.
• Nominal flow 350 l/min, flow up to 870 l/min, operating pressure up to 350 bar.
• Size 25 with ISO 4401-08-08-0-05 interface, subplate mounting.
• Symbol V1 with a linear characteristic, command value and flow track proportionally.
• Command value 4 to 20 mA, 24 VDC supply, 7-pole connector (6 + PE) to EN 175201-804.
• External pilot oil supply and external return, NBR seals for HL fluid.

Applications

The valve belongs in axes that have to control a position or a velocity, for example in test rigs, forming presses and marine hydraulics. The linear characteristic of symbol V1 simplifies tuning of the outer loop, because plant gain barely shifts across the stroke. The current signal stays stable even over long cable routes. At 16.94 kg the valve can still be fitted by hand.

Manufacturer

Bosch Rexroth, material number R901579109. The manufacturer lists this version under the type code 4WRDE25V1N350L-6X/MXY/24F1.