Air maintenance device is an automatic, field-adjustable, pressure reducing device. It is used to maintain a predetermined air or nitrogen pressure in a dry pipe sprinkler system, preaction system, or dry pilot line system of deluge or preaction valve.
|Inlet||Outlet||Standard valve components||Other accessories||Max inlet pressure||Ref. No.|
|1/2″ NPT, from compressed air supply||1/2″ NPT, to system||Air control valve, strainer, pressure regulator, Restrictor check valve, By-pass valve||Carbon steel nipple, malleable iron tee, elbow, union, etc.||200 psi||V9401 (UL/FM)|