A-T Controls' expanded line of Triac THD heavy-duty scotch yoke actuators is engineered for the most demanding liquid and air handling applications, powering quarter-turn dampers and valves with up to 1,600,000 in. lbs. (180,800 nm) torque.
Capable of operating ball, butterfly and plug valves, dampers or louvers, THD actuators use a symmetrical-design yoke that delivers maximum torque at both ends of the 90-degree cycle. The THD Series meets comprehensive application needs with six basic body groups, each available in spring-return or double-acting versions and operating air pressures from 40 to 100 PSIG, plus a complete line of accessories.
Modular design allows mixing power groups and spring cartridges with different center body sizes to suit different air pressures and requirements for fail-clockwise or fail-counterclockwise operation.