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 6130-01-296-7459
NSN 5835-01-132-5894
NSN 5835-01-242-9806
NSN 5975-01-608-1798
NSN 5998-01-226-8562
NSN 5915-01-126-5764
NSN 5965-01-350-5105
NSN 5996-01-436-8548
NSN 5965-01-231-9125
NSN 5935-01-222-6871
NSN 2925-01-464-3093
NSN 6135-00-448-5642