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Edward Lowton
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For quarter-turn applications
01 July 2015
Designed for use with motorised quarter-turn valves and dampers, the new AB550M gearbox from Rotork Gears is manufactured as standard with cast iron housing components, high performance axial thrust bearings, a protected steel input shaft and a polyurethane coating to deal with arduous applications and aggressive environments.

The ability to support electric actuators weighing up to 46kg and input speeds of up to 72rpm offers suitability for many applications in the chemical, power generation, water & sewage treatment, HVAC and general industries.
With a maximum output torque of 600 Nm, 45mm maximum output bore, output flange sizes from F07 to F16 and +/-5º adjustable 90º stroke, the AB550M will operate a large range of ball, butterfly and plug valves, or power and process dampers.
- Valve actuation at the centre of oil tanker VOC emission control system
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- Valve actuators selected for critical coal seam gas application
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- Wireless valve monitoring
- Handy in hot water
- Fast acting damper drives
- Sixty years of backwards compatibility
- Intelligent part-turn valve actuator