SQTW Quarter-turn Gear Series

      Valve Gears SQTW series Quarter-Turn Worm Gearboxes, are intended to operate Ball, Plug and Butterfly valves as well as power and process dampers. They are rugged, industrial grade products manufactured with ductile iron housing components.


      SQTW series Quarter-Turn worm gearboxes are suited for power, chemical, water, HVAC industries and for most general industrial applications. Various ratios and hand wheels are available in different.


  • Precision casting ductile iron housing
  • Output torque, range from 420 up to 135000 Nm
  • High efficient roller bearing
  • High strength protected steel input shaft
  • Stroke 0°-90°(±5° adjustable)
  • Compact structure
  • Totally enclosed gearing with O-rings
  • Enclosure Protection IP67
  • Valve Connection: ISO5211
  • Lubricant (Grease)
  • Working temperature form -20°C to +120°C


  • Padlock
  • Enclosure protection IP68
  • High and Low Temperature