Iron Falcon 72 Posted February 15, 2009 Share Posted February 15, 2009 I'm coming from an Oxy-acetalene welding background. So why don't any of the propane forge designs I've seen use one? Apparently not necessary but why not? Thanks Quote Link to comment Share on other sites More sharing options...
arftist Posted February 15, 2009 Share Posted February 15, 2009 While they are called antiflash back valves, the actual purpose is to prevent mixing of the two gases in one tank. Propane-air forges don't have two gases to mix, however, anti flashback devices are also not required with oxy-propane setups, can't remember why. Quote Link to comment Share on other sites More sharing options...
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