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 6650-01-237-4689
NSN 6650-00-407-0745
NSN 5910-00-865-7701
NSN 5965-01-512-0654
NSN 4140-01-607-0795
NSN 6685-00-244-9117
NSN 5920-00-412-4813
NSN 5945-01-195-5546
NSN 7035-01-026-0117
NSN 5960-01-481-8051
NSN 5996-00-248-7061
NSN 6620-01-569-4621