Extremely compact scotch yoke pneumatic actuator. • Double-acting and spring-return configurations. • Contained spring module for safety and convenience. • Torque output to 4,400 Nm (38,000 lbf.in). • ...

Areas to be covered are as follows: ISA96.01 – The basic requirements for terminology for valve actuators and their ... fail position is specified as spring-return fail closed, spring-return fail open ...