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 5835-01-599-1876
NSN 5910-01-244-0762
NSN 6150-00-359-2019
NSN 6650-00-532-8125
NSN 6105-01-299-1538
NSN 6105-00-209-5788
NSN 5998-01-025-1688
NSN 5930-01-449-1915
NSN 5935-01-293-0395
NSN 6645-00-764-0412
NSN 5855-01-432-4401
NSN 6220-01-177-8355