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Flowserve-Limitorque-Gearboxes - Quarter-Turn - HBC series

Gearboxes - Quarter-Turn - HBC series

BRAND: Limitorque

The Flowserve Limitorque HBC series of worm gearboxes is designed for quarter-turn butterfly, ball, and plug valve applications as well as quarter-turn and multi-turn dampers.


  • General Industry
  • Chemicals
  • Water
  • Oil & Gas
  • Power

industry sectors

  • Steel & Primary Metals
  • Food & Beverage
  • Basic (Organic & Inorganic)
  • Waste Water
  • Agriculture
  • Downstream Processing
  • Conventional Steam
  • Geothermal
  • Combined Cycle
  • Concentrated Solar Power (CSP)
Design Range

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

Features & Benefits
  • Broad application versatility provided by ability to actuate a wide range of devices, both manually or motorized, at a considerable range of output speeds and torque
  • High strength and durability provided by ductile iron housing and roller bearing supported shafts and drive sleeve 
  • Weatherproof, temporary submersion, and buried services available
  • Splined valve shaft adapter
  • Nuclear-qualified, with SMB actuators or as stand-alone gearboxes
  • Self locking gearing
  • Increased uptime due to bronze worm gear paired with alloy steel worm shaft
  • Lower maintenance costs due to heavy-duty construction; proven in use for more than 50 years to be rugged and dependable
  • Ease of operation made possible by valve position pointer, which makes at-a-glance position checking easier than ever

Protected against the ingress of water and dust

Suitable for temporary submersion to IP67 and IP68

Buried Service
Suitable for in-ground installation

Suitable for inside containment, safety related service


Flowserve Limitorque offers practical product training at our global automation headquarters in Lynchburg, Va., and our state-of-the-art valve automation center in Houston. Taught by qualified instructors in classroom settings, these three-day courses emphasize hands-on training. Key topics include the principles of actuator functionality as well as actuator setup and commissioning, maintenance and troubleshooting. View available courses and dates.


Our global expertise and local service centers ensure that you stay up and running. Learn more about our services.

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