When are flashback arrestors needed?
I have been using a torch since 2005 but am suddenly a bit confused about when flashback arrestors and check valves are needed. I have never used either of these things on my current setup which is a Mini CC with a 10 lpm concentrator and a propane tank with regulator. I’m getting ready to buy a new torch and want to make sure that I do things right. After doing some research, this is what I’m lead to believe:
Pre-mix torches MUST have flashback arrestors installed.
Surface mix torches don’t need flashback arrestors, but it is a good idea to have one installed on the fuel hose.
A flashback arrestor should not be used on an oxygen concentrator hose. Is this true even with a pre-mix torch?
Never even heard of a check valve until today. Are these necessary?
Can somebody clear things up for me please?
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Lynn
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