Proportional Directional Valve 4WRLF16W8-200LJ-4X/MXY00/24TD90 - Bosch Rexroth R901559978

A size 16 axis has to control speed and position steplessly without a separate amplifier taking up space in the cabinet. The pilot-operated 4/3 proportional directional valve 4WRLF16W8-200LJ does this with 250 l/min nominal flow, a permissible flow of up to 800 l/min and integrated fieldbus electronics that carry supply and enable acknowledgment through a 7-pole connector.

Key benefits

• 350 bar operating pressure, the upper end of the series, suited to press and clamping circuits.
• Internal spool position feedback holds the spool under load changes and makes ramps repeatable.
• Integrated fieldbus electronics close the loop at the valve, so the external amplifier and its wiring are dropped.
• External pilot oil supply and external pilot oil return keep the pilot circuit independent of the main circuit.
• Connection diagram ISO 4401-07-07-0-05 fits any standard subplate of this size.
• Spool symbol W8, spool valve with three switching positions and four ports, NBR seals.

Applications

Valves of the 4WRLF family sit in presses, injection moulding machines and test rigs, where a large cylinder is driven to position along a defined ramp. The nominal flow of 250 l/min suits cylinders that move large oil volumes within seconds. With the electronics mounted on the valve the control loop stays short and the machine controller only supplies command value and enable. At 12.42 kg the valve needs a subplate rated for that load.

Manufacturer

Bosch Rexroth, material number R901559978. All technical values are taken from the manufacturer data for this material number.