GP (pneumatic) and GH (hydraulic) Range scotch yoke actuators are designed to provide a rotary, quarter-turn movement for either on/off or modulating duty. The rugged yet compact design is available with two different yoke designs. The classic symmetrical yoke delivers peak torque at both ends of stroke. Alternatively, they can be supplied with canted torque arms designed to deliver peak torque at only one end of stroke. Use of canted arms can often reduce actuator size, weight and cost for valves with appropriate torque demand characteristics.
GP and GH Range actuators share a modular construction. The centre body is available in ten sizes producing output torque up to 600,000 Nm (5.3 million Ibf-in). (Publication F100)
CP Range pneumatic actuators are a versatile, modular, scotch yoke design available in both double-acting and spring-return configurations. The compact and efficient design yields high torques even at low pressures. The design concepts found in Rotork's large, heavy-duty actuators has been applied to the CP Range, which brings heavy-duty actuator qualities to small, quarter-turn actuators.
The actuator body is of rugged, ductile cast iron available in four body sizes. Cylinders are manufactured from carbon steel, electroless nickel-plated.
Further information, along with complete documentation can be found on the Rotork website