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 5998-01-438-5086
NSN 5985-00-679-0722
NSN 5985-00-528-8636
NSN 5998-00-788-3260
NSN 6220-01-497-1277
NSN 6105-01-490-0170
NSN 5895-01-039-9474
NSN 5910-01-451-4292
NSN 6650-00-690-5840
NSN 6645-00-479-9334
NSN 6685-00-462-3069
NSN 6220-00-943-5129