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Old 2013-09-19, 4:34pm
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Silver Moon Lampwork Silver Moon Lampwork is offline
Against the Grain
Join Date: Dec 07, 2006
Location: The Villages, FL
Posts: 1,396
Default 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. Iím getting ready to buy a new torch and want to make sure that I do things right. After doing some research, this is what Iím lead to believe:

Pre-mix torches MUST have flashback arrestors installed.

Surface mix torches donít 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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