WGS Range Sub-Sea Worm Gear Operators


Quick Details

Place of Origin:

Zhejiang, China

Brand Name:


Model Number:

WGS Range

Gearing Arrangement:


Output Torque:

Up to 500,000 Nm


11 available


From 40:1 to 7440:1


Classes 1 to 7

Online Customization


Heavy duty range of quarter-turn worm gearboxes suitable for use on all sub-sea quarter-turn valves at any depth below sea level

The WGS series quarter-turn worm gear operators are designed for heavy duty sub-sea applications at any depth with carefully chosen materials to offer the highest level of reliability required in this very harsh environment.

The operators are equipped with membrane or piston type pressure compensators to balance the pressure and allow them to work at any depth.

The WGS series has a good track record in the sub-sea industry.

Various options are available and can be engineered per application when required.

The WGS Series are designed to be operated either manually by a diver or by ROV (Remotely Operated Vehicle)


  • Membrane type pressure compensator
  • Custom designed to suit project specifications
  • High visibility position indicator
  • Worm shaft supported on taper roller bearings
  • High strength alloy steel worm screw hardened and ground
  • Self-locking
  • Many ratios available
  • Permanent lubrication with eco-compatible oil
  • Stop bolts protected by stainless steel caps
  • Finish painting for subsea environment
  • Vertical or horizontal mounted carbon steel ROV input from class 1 to 7
  • Stainless steel input shaft
  • Handwheel for operation by diver
  • Stroke 0-90º (±5º adjustable)


  • Manual and ROV operation
  • Piston or open type pressure compensator
  • Super Duplex input shaft
  • Tactile position indicators
  • Telescopic ROV extension
  • Carbon steel housing
  • Aluminium bronze worm gear
  • Stainless steel ROV bucket
  • Relief valve
  • Finish painting according to customer specification