Limitorque® HBC Series Quarter-Turn Gearbox

Flowserve Limitorque HBC Series quarter-turn worm gearboxes support reliable manual or motorized operation of butterfly, ball and plug valves, as well as quarter-turn and multi-turn dampers. Rugged construction suits demanding service conditions.

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  • Versatile operation supports a wide range of devices, output speeds and torque requirements
  • Durable ductile iron housing and bearing-supported shafts withstand demanding service
  • Flexible configurations accommodate weatherproof, temporary submersion, buried applications, and nuclear service.
  • Self-locking gearing helps maintain secure valve positioning
  • Simplified position indication enables fast visual status checks

Torque Rating Range: Torque output to 93 000 ft-lb (126 204 Nm)

Weatherproof
Protected against the ingress of water and dust

Submersible
Suitable for temporary submersion to IP67 and IP68

Buried Service
Suitable for in-ground installation

Nuclear
Suitable for inside containment, safety related service

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