Air maintenance device
- Certificate: UL Listed / FM Approved
- Standard: Refer to UL 260, FM 1011/1012/1013
- Construction: Full assembly of valves and pipe fittings
- Function: Automatic, field-adjustable, pressure reducing device
- Inlet pressure: 200 psi, air or nitrogen
- Surface: Hot dip galvanized and rough bronze, etc.
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.