Expanded Line of Heavy-Duty Actuators for Quarter-Turn Valves and Dampers Offers Higher Torque - 1,600,000 in.-lb - With Reduced Cost
Modular engineering and dozens of options ensure suitability for any application in temperature extremes or -40° to 177°C
September 2009 - 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. Optimized manufacturing and highly modular design help reduce cost, while increasing the line's range of options and torque ceiling. Capable of operating ball, butterfly and plug valves, dampers or louvers - any device that requires quarter-turn movement for on-off or throttling service - THD actuators use a symmetrical-design yoke that delivers maximum torque at both ends of the 90° cycle. The proven design stands up to hard service in industries such as oil and gas, power generation, chemical processing, water/wastewater, mining, primary metals, and pollution control.
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.
THD actuators are temperature-rated from -29° to 93°C (-20° to 200°F), with an optional low temperature rating of -40° to 82°C (-40° to 180°F) or a high temperature rating of -18° to 177°C (0° to 350°F). Proven engineering and materials ensure long trouble-free service. A square slide bearing and chrome-plated piston rod, guide bar and pressure cylinder deliver smooth stroke and extended life while reducing wear points. Standard features include heat-treated alloy-steel springs, travel stop adjustment of ±8° in both directions and weatherproof enclosure.
A complete line of accessories such as jackscrew, hydraulic and gear-driven overrides, complements the THD series. Mechanical, proximity, inductive and transmitter limit switch options are available in all NEMA ratings, along with pneumatic, electro-pneumatic and smart positioners. A-T Controls offers complete mounting hardware to integrate THD actuators with any quarter-turn valve, damper or louver.
A-T Controls specializes in modular, packaged solutions and fast delivery from stock on a comprehensive selection of ball valves, actuators and controls for process and pollution control industries.
For more information on TRIAC THD actuators, contact: Ron Ruehlmann, A-T Controls, 11363 Deerfield Rd., Cincinnati OH 45242. Phone: 513-247-5465. Fax: 513-247-5462.
Email: Rruehlmann@a-tcontrols.com. Website: a tcontrols.com.
