Rotork CQ Compact valve actuators

The CQ Compact is a range of compact fully concentric, balanced-design pneumatic and hydraulic valve actuators that deliver an efficient, self-contained solution for applications demanding functional integrity and safety where space is limited.

In addition to providing reduced dimensions, the CQ’s symmetric design also presents a good weight balance on the valve, enabling increased efficiency for assembly and disassembly. The weatherproof housing contains a helical mechanism which transforms linear piston motion into 90° (±5°) rotation for the operation of quarter-turn valves. As an option, rotation can be increased to 180°. Complete customisation of the torque profile is available to suit individual valve requirements.

The range features a choice of cylinder sizes and different actuator builds for diverse applications. The CQ design incorporates the removable valve adaptation within the overall dimensions for maximum compactness, and actuators can be easily and safely disassembled for field maintenance. Internal coatings provide enhanced corrosion protection, while external epoxy finishes and a wide choice of seal materials can be specified to meet requirements.

The actuators are available for single- or double-acting operation with output torques up to 600 kNm. Pneumatic operation is available using air, nitrogen or natural gas at 12 barg pressure, while 210 barg is recommended for hydraulic operation. Environmental and hazardous area certifications include IP66M/IP68M, PED, ATEX, IECEx and GOST.

The units are also suitable for SIL3 safety-related duty. The standard operating temperature range is -30°C to +100°C, with an optional low-temperature limit of -60°C.