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AB Quarter-turn Manual Gearboxes


Rotork’s AB range of quarter-turn operators have a cast iron housing and are intended for applications in chemical, power, waterworks, HVAC and most general industrial applications.

  • Cast iron housing (ductile iron optional)
  • Protected input shaft (Stainless Steel optional)
  • 15 sizes up to 32,000 Nm output
  • Ratios from 34:1 to 729:1
  • Rugged construction for all environments
  • IP67
  • Axial needle bearings
  • Polyurethane coating
  • Stroke: 0 to 90º (+/- 5º adjustable)

Stock locally available, subject to prior sale.

See AB Part-turn Catalogue (pub033-006)

IW Quarter-turn Motorized Gearboxes


The new IW Mk2 worm gear operators have been designed to suit isolating duty motorized applications. The gearboxes include low lead angle gearing designed to be inherently self-locking and offer an increased torque output per size compared to the previous IW range. IW Mk2 worm gear operators are quarter-turn devices intended for the operation of ball, plug and butterfly valves.

  • Torque range up to 850,000 Nm
  • Comprehensive gear ratios combined with a selection of auxiliary input spur gear reducers.
  • Inherently self-locking gearing.
  • Angular contact bearings supporting worm shaft.
  • Removable and repositionable output sleeve.
  • Repositionable baseplate facility

See IW Mk2 Quarter-turn Worm Gearbox Catalogue (pub028-079)

HOB Hand Operated Bevel Gearboxes


Hand operated bevel gears suited for sluice gates, gate and globe valves.

  • Torque range up to 8,018 Nm
  • Thrust range up to 1,557 kN
  • Ratios from 2:1 to 81:1
  • Cast iron body
  • Maintenance free
  • IP67
  • Options for all types of environments
  • Optional Position indicators
  • Optional IP68

Stock locally available, subject to prior sale.

See HOB Series Bevel Gearbox Catalogue (pub032-003)

IB Multi-turn Motorized Gearboxes


Rotork Series IB operators are multi-turn (rotary) devices intended for the operation of gate, globe, sluice and penstock valves.

These gearboxes are suitable for the most demanding motorized applications.

  • Torque range up to 8,135 Nm
  • Thrust range up to 1,320 kN
  • Ratios from 1:1 to 120:1
  • Totally enclosed gearing
  • Grease filled for life
  • Removable output sleeve
  • Input flanges to suit electric actuators

See IB Multi-turn Gearbox Catalogue (pub030-001)

For more information or quotations on the above range of products, please contact the following EPC representative.

Sales Contact

Mark Trevethan


084 611 7711