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 5925-00-096-5165
NSN 6610-00-790-6946
NSN 5998-00-389-7001
NSN 5945-01-634-0588
NSN 6110-00-855-5695
NSN 5990-01-296-8190
NSN 5930-00-299-7623
NSN 5999-01-279-9348
NSN 6110-00-271-9928
NSN 6135-01-447-3086
NSN 5998-01-320-7655
NSN 5960-00-248-8505