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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 utilised 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 utilised 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.
Torque
- Up to 150,000 Nm (1,300,000 lbf.in)
Operating Medium
- Instrument air
- Mineral oil
- Sweet, clean and dry natural gas / nitrogen
Design Pressure
- 12 barg for the pneumatic
Stroke Adjustment
- 90° ± 5°
Temperature Range
- Standard: -30° to 100° C (-22° to 212° F)
- PED Compliant: -20° to 160° C (-4° to 320° F)
- Low: -40° to 160° C (-40° to 320° F)
- Extreme Low: -60° to 160° C (-76° to 320° F)
Certification
- IP66M/IP68, PED, IECEx, EAC, suitable for SIL3 application
- Actuators certified to ATEX 2014/34/EU
Specifications
Brand
Operating Pressure
- Up to 7 bar (175 psi)
Torque Output
- Up to 150,000 Nm (1,300,000 Lbsf.in) 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
- SIL3
Features
- 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
In our experience, the CQ standard range of sizes is suitable for applications that require a pneumatically powered actuator with torque demand less than 150,000 Nm. However, we also engineer CQ actuators with greater output and/or hydraulic power. Please apply to Rotork for these applications.
- Weatherproof housing suitable for harsh environments
- Applications: SIL3, functional integrity, safety, limited space
- Pneumatic, single and double-acting