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valve gearbox / worm / orthogonal / high-efficiency
IW Manual



  • Type:


  • Shaft orientation:


  • Performance:


  • Other characteristics:

    manual, combined, for valves

  • Torque:

    Max.: 850,000 Nm (626,927.8269

    Min.: 250,000 Nm (184,390.5373


The IW range of quadrant wormgear valve operators is available in manual and motorised configurations and features a removable sleeve to facilitate bore and keyway machining. This sleeve can be rotated in steps to facilitate mounting to the valve.

IW size 3 to 13 torque range up to 264,000 Nm.

IW size 14 to 17 torque range from 250,000 Nm to 850,000 Nm.

Worm shaft supported by angular contact bearing
High efficiency and multiple ratios
Removable drive sleeves up to IW11
Stroke: 0 to 90º (+/- 5º adjustable)

Other Rotork plc products

Valve Gear Operators