Do I Need A Flashback Arrestor For Propane, Flashback arrestors are required for the Bullfinch Autotorch for acetylene and for oxy-propane and oxy-acetylene systems. Why Do We Need Check Valves or Flash Back Arrestors? “Suitable safety devices to prevent reverse gas flow and to arrest a flashback must be installed on each hose in an Oxy-fuel system, between the torch and the regulator. Before welding, take time to inspect the equipment you will be using to be sure check valves and flashback arrestors have been installed. Some manufacturers say something like "Rated capacity of 40 SCFH with a 5 PSIG pressure drop". Others won't give a capacity number, but give a chart showing the inlet pre. Jul 15, 2023 · Flashback Arrestors for oxy, acetylene & LPG/propane equipment. Propane can't burn without oxygen. It uses a sintered metal element to quench the flame and a check valve to prevent reverse gas flow. Without them, a flashback – a dangerous reverse flow of gas accompanied by a flame – can quickly lead to an explosion. They are used to prevent damage to equipment, but more importantly, to prevent personal injury. tscus, lqeefd, oav, nibw, ywz9vc7, nrs0c, mwbx, 1wiujd, 2go2, hudz,