FM-approved oil/gas shutoff valves feature explosion-proof design


FM-approved valves and valve assemblies for liquid and gas shutoff, new from A-T Controls, bring advanced design, patented features, and build-to-order application flexibility to protection of fuel-burning equipment. Approved to FM class 7400, 7420 and 7422, the A-T shut-off assemblies provide fast action on shut-off needs with next-day delivery and quick quarter-turn actuation. The A-T units feature a spring-return automated ball valve, explosion-proof limit switch and solenoid pilot valve, advanced quarter-turn rack-and-pinion actuator design, superior valve seating, and patented world-class stem seal system. A-T shutoff assemblies provide high-trust reliability and consistent fuel/gas shutoff in a compact, space-saving safety shut-off system. Configurable to a wide range of shut-off requirements for build-to-order flexibility at standard model economies, valves are available in 3-piece or flanged models, 316SS or WCB trim, and 1/4" to 6" sizes. The 3-piece valves offer choice of threaded, socket weld or butt weld end connections, while flanged valves are available in 150# or 300# flange rating. Assemblies can be ordered with manual safety cocks or automated safety shut-off valves. Solenoids are approved for water-proof as well as explosion-proof environments. All the valves feature A-T Control's exclusive pyramidal stem seal system. Patented in the U.S., Germany and China, the live-loaded packing system features 45° pyramidal stem and stem seal with Belleville washers and chevron packing. The design gives world-class fugitive emission control, receiving TA-LUFT low-emission certification (the world's most stringent) from the German TUV agency. Automated shut-off assemblies feature advanced, quarter-turn rack-and-pinion actuator design giving marked performance improvement over older spring-diaphragm technology.


Valve Assemblies for Gas andOil Shut-off Requirements * 316SS or WCB valves * 3-piece and flanged valves * Manual safety cocks and automated safety shut-off valves * Solenoid approved for waterproof and explosion-proof environments * Valves feature pyramidal stem seal system
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