The Fluid System Division of valve actuation specialist Rotork has introduced a new range of small quarter-turn pneumatic actuators, enabling the proven benefits of Rotork’s larger, heavy-duty scotch yoke actuator designs to be applied to the operation of valves as small as 25mm (1 inch). Like its big brothers, the CP range features a sturdy, modular design. Internal support bearings in the fully sealed centre body maintain piston alignment to ensure a long service life, while the nitrided yoke provides enhanced bearing surface performance. Cylinders are electroless nickel plated on internal surfaces to prolong piston seal life. The dual
mounting capability facilitates open or close failsafe operation, with control mounting pads on both body faces to assist with the packaging of control equipment. Namur standard drive shaft dimensions are compatible with most valve designs, simplifying the adaptation requirements. Designed for a maximum pneumatic operating pressure of 12 Barg, CP actuators provide an end of spring torque range of 28Nm to 1456Nm. The modular design enables actuator components to be swiftly assembled from stocks that will be held at Rotork Fluid System centres of excellence around the world.
