Triac Controls line of heavy duty scotch yoke actuators offer a broad range of torques to 600,000 In-Lbs. The THD series is designed to operate ball, butterfly, plug valves or any device that requires a quarterturn movement for on-off or throttling service. Our standard offering is the symmetrical design yoke that delivers maximum torque at both ends of the 90o cycle. Our square slide bearing along with the guide bar gives high cycle life and smooth stroke while minimizing wear points. As with all Triac actuators, our THD series comes with a complete line of accessories, including jackscrew, hydraulic overrides, limit switches, solenoids and positioners. A-T Controls also offers complete mounting hardware to integrate our actuator with any quarter-turn valve, damper or louver.

THD Series Heavy Duty Actuators feature:

• Torques to 600,000 in-lbs.
• Air pressure 40 to125 PSIG
• Temperature range -20oF to 180oF (-20ºC to 80ºC)
• Optional low temperature range of -50ºF to 180ºF (-46ºC to 80ºC) or high temperature range of 0oF to 350ºF (-18ºC to 170ºC)
• Weatherproof enclosure
• Heat treated steel springs
• Travel stop adjustment of ±8º in both directions
• Chromium plated piston rod, guide bar and cylinder tube to ensure smooth stroke and extended life
• Steel slide block with bronze slide bearing to minimize friction and provide long cycle life
• Parkerized coating on internal and external surfaces

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