View Single Post
Old 2013-09-19, 4:53pm
De Anza Art Glass Club De Anza Art Glass Club is offline
Senior Member
Join Date: Nov 24, 2009
Posts: 205

I have a German burner (not a Herbert Arnold) that uses propane, oxygen, and air. The manufacturer recommends a check valve in the air line to prevent oxygen from backing up into the air supply line.

I would say that flashback arrestors are usually paired with check valves. Flashback occurs when the oxygen flows into the fuel line (and less frequently, when the fuel flows into the oxygen line, since oxygen pressures are generally higher than fuel pressures ... until the tank runs out). Check valves prevent the reverse flow of gas and flashback arrestors dissipate the heat of the flame flowing through them, so by that description, they both have a function in preventing a flashback from reaching the cylinders.

I would guess that a check valve would not be favored with an oxygen concentrator since it is an additional pressure drop.
Reply With Quote