The FireLock air maintenance trim package is designed to control the system air pressure when using the series 756 dry valves, series 758 actuated valves, or the FireLock NXT 768 dry and 769 acutated devices for dry sprinkler applications. The Victaulic Air Maintenance Trim Assembly should be used with a reliable source of continuous (24 hr/day, 7 days/week) air available, such as shop air or a tank mounted air compressor with an attached pressure control switch. The high pressure of the supply air is reduced by the integral regulator in the Air Maintenance Trim Assembly to the recommended air pressure based on the water supply pressure.

• High quality regulator which maintains the sprinkler piping air pressure
• Strainer: a 100 mesh strainer is used to prevent particles from entering the air maintenance system and the sprinkler system
• Restrictor: a brass restrictor is used in the maintenance loop in order to assure that air cannot enter the sprinkler system faster then air can be discharged through an open head
• Spring loaded in-line check valve: bubble tight ball check used to isolate the valve air maintenance system from air leaks in the air supply system
• Fast fill line: used to rapidly restore system air pressure following operation or service
• Recommend maximum of 2-systems per air maintenance trim
• Regulator is a pressure reducing type

Standards/Certifications: cULus listed and FM approved

Applications: For series 756 dry valves, series 758 actuated valves, FireLock NXT 768 dry and 769 actuated devices For dry sprinkler applications

• Specification Sheet https://www.plumbers-supply-co.com//ASSETS/DOCUMENTS/ITEMS/EN/UNI-PS23850_Spec.pdf