Scotch-yoke pneumatic actuator
A scotch-yoke pneumatic actuator converts piston travel into limited rotation through a yoke, with output torque shaped by its particular geometry. The title does not make it universally superior to rack-and-pinion equipment. Valve torque demand, angle, air pressure, return type, dimensions, and stem loads must be compared for the actual assembly.
Application and duty
Quarter-turn pneumatic drive after actuator and valve torque curves are matched