Proportional Directional Valve 4WRZE32W8-520-7X/6EG24EK31/F1D3M - Bosch Rexroth R901018157

Two valves of the same series can be mechanically identical and still refuse to work together, because one position in the type code fixes the kind of command input. The 4WRZE32W8-520-7X/6EG24EK31/F1D3M expects a 4...20 mA current signal and turns it into 520 l/min nominal flow at 350 bar operating pressure.

Key benefits

• Command input 4...20 mA - matches controllers with current output cards, with no converter in between.
• 520 l/min nominal flow - the upper step of size 32, rated up to 1600 l/min by valve size.
• Internal pilot supply, external pilot drain - one Y line is all the extra pipework needed.
• On-board electronics, 24 VDC - a 7-pole connector (6 + PE) to EN 175201-804 carries power and signal on one cable.
• Spool symbol W8, subplate mounting ISO 4401-10-09-0-05 - fits existing size 32 manifolds.
• 43.76 kg, NBR seals, hydraulic fluid HL - EMC conformity to UKCA SI2016/1091.

Applications

Typical positions are main axes on presses, bending machines and forging lines whose control system works with current signals. Swapping to a voltage version would mean changing the controller, so the command type is worth checking before ordering. The valve is built as a pilot-operated spool valve with 4 ports and 3 switching positions.

Manufacturer

Made by Bosch Rexroth, material number R901018157. The link between type code, command type and curve is given in data sheet RE 29115, supplemented by RE 07600-B.