A device designed for installation in the main riser of a dry or empty pipe automatic sprinkler system and held closed by spring force, air, or water pressure. Water is automatically released to the sprinkler system either by releasing or lowering the pressure beyond the minimum requirement or admitting and increasing the pressure to overcome the spring force.
Classification: Parts, nesoi, of mechanical appliances for projecting, dispersing or spraying liquids or powders; of fire extinguishers; of spray guns
NSN 2925-00-936-9344
NSN 6620-01-571-7727
NSN 6145-01-526-9217
NSN 6145-01-371-2404
NSN 6105-01-605-3555
NSN 6145-01-259-9833
NSN 4140-00-507-9043
NSN 5945-01-111-1763
NSN 5965-01-130-5952
NSN 5895-01-303-7095
NSN 5999-01-160-7465
NSN 6620-01-180-2687