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 5985-00-679-2624
NSN 6130-01-349-8603
NSN 6220-00-473-0517
NSN 5975-00-337-6653
NSN 6610-00-303-0338
NSN 5910-00-594-7986
NSN 6135-01-458-0631
NSN 5920-01-471-7771
NSN 5925-01-071-6671
NSN 5905-00-632-9473
NSN 5996-01-462-5332
NSN 5935-00-468-4401