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 6320-00-546-9249
NSN 6150-00-246-6673
NSN 5996-01-291-0866
NSN 5950-00-415-4569
NSN 7035-00-470-4977
NSN 5950-01-105-9880
NSN 6685-01-151-1367
NSN 5975-01-626-5042
NSN 6135-01-104-3790
NSN 6105-00-365-4519
NSN 5835-01-261-2978
NSN 5996-00-264-0710