Proportional Directional Valve 4WRZE32W8-520-7X/6EG24N9K31/F1D3M - Bosch Rexroth R901055378

Frequency converters and welding lines disturb voltage signals, so this version relies on a 4 to 20 mA current loop to set 520 l/min nominal flow.

Key benefits

• 4 to 20 mA current loop carries the command value intact even alongside power cables.
• External pilot oil supply and external pilot oil return, so the pilot circuit can be measured and protected on its own.
• 520 l/min nominal flow at a permissible maximum flow of 1600 l/min.
• Spool symbol W8, 3 switching positions, 4 ports, interface ISO 4401-10-09-0-05.
• 43.98 kg installed mass, integrated pressure reducing valve, operating pressure to 350 bar.

Applications

Steel plants, welding lines and installations packed with frequency converters are typical, wherever analog signals suffer. Fully external pilot oil routing also makes diagnosis on the pilot circuit easier. The valve runs on HL fluid with NBR seals.

Manufacturer

Bosch Rexroth, material number R901055378, product family 4WRZ(E). Signal assignment and characteristic curves are in data sheet RE 29115, RE 07600-B holds the general information on hydraulic valves.