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Flowserve-Limitorque-Non-Intrusive Quarter-Turn Actuators - QX

Non-Intrusive Quarter-Turn Actuators - QX

BRAND: Limitorque

The Flowserve Limitorque QX, non-intrusive electric actuator is designed for a wide range of environmental applications in power, oil & gas, and water industries. The QX design builds on more than 20 years of proven MX technology to provide all the user-preferred features in a quarter-turn smart actuator package.


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

industry sectors

  • Pulp & Paper
  • Mining
  • Steel & Primary Metals
  • Food & Beverage
  • Other Industries
  • Basic (Organic & Inorganic)
  • Specialty (Fine & Consumer)
  • Biofuels
  • Pharmaceutical
  • Water
  • Waste Water
  • Agriculture
  • Water Management
  • Upstream Exploration & Production
  • Midstream Transportation
  • Downstream Processing
  • Nuclear
  • Conventional Steam
  • Geothermal
  • Combined Cycle
  • Concentrated Solar Power (CSP)
  • Biomass and MSW
  • All global explosion proof certifications
  • Meets pertinent European Directives (CE mark)
  • Designed to meet EN-15714
  • AWWA C540
Design Range

Torque Rating Range: From 40 to 1500 ft-lbs output torque

Features & Benefits
  • Greater process control with non-contacting absolute encoders that provide accurate position sensing
  • B.I.S.T., built-in self-test which never needs batteries to retain position data, even in the event of main power loss
  • Extreme environment performance made possible by non-intrusive design, 100% solid-state controls, and reliable digital communication control system
  • Versatility provided by flexible control configurations, setup and diagnostics in 11 languages, and advanced brush-less DC motor that supports most global voltages, AC or DC
  • 100% repeatable and redundant absolute encoder for position sensing
  • Electronic torque switch
  • 3-phase, 1-phase, and DC motors

Non-intrusive, 100% solid-state, standard open-close applications

Non-intrusive, 100% solid-state, modulating to 1800 starts per hour to EN 15714, Class D - Continuous duty

Non-intrusive, 100% solid-state, network applications - Modbus, Foundation Fieldbus, HART, DeviceNet, Profibus DP w/ redundancy and Profibus PA


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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Use Flowserve VirtualPlant 3D models of various plant types to help you 'see' our capabilities in key industrial applications.

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