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 5950-01-163-3101
NSN 5930-01-633-4257
NSN 6620-01-109-2764
NSN 6685-00-350-3966
NSN 5945-01-221-5403
NSN 5855-01-502-9239
NSN 5895-01-125-8022
NSN 5925-00-259-2098
NSN 6645-00-922-0886
NSN 6220-00-433-9337
NSN 6145-01-068-4668
NSN 5835-00-148-9719