Patent ID: 9700746
Date: 2017-07-11
CPC Classifications: A62C,G01M,Y10T

Claim:
1. A gas purging valve operative to be connected to piping in a Fire Protection System (FPS) and to bleed gas from the FPS piping at an adjustable rate, comprising: an inlet in gas flow relationship with the FPS piping and operative to receive pressurized gas from the FPS piping; an adjustable orifice operative to allow an adjustable maximum positive gas flow rate therethrough; a gas flow monitor operative to measure the positive rate of gas flow through the adjustable orifice; an outlet operative to discharge gas from the gas purging valve to the atmosphere; and a water restriction mechanism disposed upstream of the adjustable orifice, the water restriction mechanism operative to allow gas flow through the gas purging valve but operative to impede the flow of water through the gas purging valve.