Rotork CQ Range - Compact Helical Actuator

Brand: Rotork PLC

The CQ range provides an innovative fully-concentric and balanced actuator design for quarter-turn valves.

The design features a helical mechanism that transforms linear piston motion into quarter-turn valve stem rotation.

CQ actuators provide a much higher torque output for a given footprint than scotch yoke designs typically utilized to operate many quarter-turn valve types.

It is therefore ideally suited for installation in confined spaces.

Further, Rotork’s unique helical pin design provides higher efficiency than a helical gear mechanism utilized by other valve actuator manufacturers.

As standard, the CQ torque output profile, like that of a scotch yoke actuator, is engineered to parallel the torque demand profile typically found with popular quarter-turn valve types.

The CQ design however is unique in that the torque profile can be custom engineered and manufactured to meet specific, non-standard valve torque requirements.
  • Compact Design
  • Ease Of Maintenance
  • Environmental Protection
  • Balanced Design



Operating Pressure

  • Up to 7 bar (175 psi)

Torque Output

  • Up to 150,000 Nm (1,300,000 Standard

Temperature Range

  • Extreme Low: -76° to 320° F (-60° to 160° C)
  • High:  -4° to 320° F (-20° to 160° C)
  • Low: -40° to 320° F (-40° to 160° C)
  • Standard: -22° to 212° F (-30° to 100° C)

Environmental Protection

  • IP66
  • IP68

Approvals & Certifications

  • ATEX
  • EAU
  • PED

Approvals & Certifications

  • SIL 3


  • Manual Override

Flange Material

  • End/Bottom Flange: Carbon Steel

Drive Shaft Material

  • Carbon Steel

Material of Construction

  • Cam Follower Bearing: Aluminum Bronze
  • Piston, Helical/Vertical Slot Cylinder & Pneumatic Cylinder: Carbon Steel
  • Spring: Spring Steel
  • Upper/Lower Stop Bolt & Tie Rod: Alloy Steel

Shaft Size

  • 10 to 120 mm

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