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 5925-01-198-6970
NSN 6135-01-364-0667
NSN 6610-01-483-1317
NSN 4140-01-603-9782
NSN 5965-00-798-3597
NSN 5920-01-641-5469
NSN 6110-00-104-7401
NSN 6240-01-641-5315
NSN 6145-01-350-6938
NSN 5975-01-103-4835
NSN 5905-01-097-7576
NSN 6150-01-563-2345