Product Use Description anti-tempering means is a number of micropores of metal parts, such as steel or copper alloy, but the high temperature in a short time through the cold metal, the metal can not be heated up to not reach the metal at the combustion temperature of the acetylene automatic quench achieve flame. Anti-tempering device principle is: the use of copper mesh cooling effect, to cut off the spread of flame. This set of equipment together with the blow-out preventer and utilization of gas drainage systems are essential safety facilities. Suitable for installation in gas output pipe system, usually installed at a distance closer to the user or the location of the gas pump, protect mine down, drainage pump station and the user's security. Anti-tempering device uses: FHQ series anti-tempering device is a coal mine gas drainage pipeline explosion combustion flashback device, gas drainage system is an essential safety facilities installed in the suction and discharge gas pipe end of the pipeline, usually connected to the explosion-proof seal on the front. Protection of the mine down, drainage pump station and personnel safety. Anti-tempering means is a number of micropores of metal parts, such as steel or copper alloy, but the high temperature in a short time through the cold metal, the metal can not be heated up to not reach the metal at the combustion temperatures of acetylene automatically quench achieve flame. Product structure FHQ series anti-tempering device structure is shown below, mainly by the cone cylinder 1, copper mesh 2, the middle three straight pipe, flanges 4 and other components. Specifications