ABM - Quarter-Turn Motorised

The AB550M is a rugged, industrial grade product manufactured with cast iron housing components, featuring a polyurethane coating and high performance axial bearings.


The ABM operators are quarter-turn devices intended for the operation of ball, plug and butterfly valves as well as power and process dampers. These gear operators are well suited for applications in chemical,
power, waterworks, HVAC and most general industrial applications. The AB550M will support electric actuators weight up to 46 kg and a speed up to 96 rpm.


  • Torque: 600 Nm For motorised torque the static safety factor is 2
  • Ratio: 34:1
  • MA: 12 +/-15%
  • Bore: 45 mm
  • Input: F10
  • Output: F07, F10, F12, F14, F16
  • Cast iron housing
  • Protected steel input shaft
  • Rugged construction
  • Axial thrust bearings
  • Stroke: 0 - 90° (± 5° adjustable)
  • Standard temperature -20 to +120 °C
  • ATEX approved
  • Removable insert


  • High Temperature to +200 °C
  • Low Temperature to -60 °C
  • Firesafe to ISO 10497
  • Ductile iron housing

Environmental Specification:

  • Standard duty: IP67
  • Optional duty IP68: Marinised, Continuous Submersion & Buried

See ABM Literature Page & ABM Options Page for further details.

ABM – Quarter-Turn Motorised Gearbox