cULus Listed|FM Approved

• 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 two-systems per air maintenance trim Regulator is a pressure reducing type

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 actuated 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.