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.
Available size
| 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) |
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