Cutting torch question

[todd281]

I have owned a Harris model 75 cutting torch for some time now and asked about this to several people , including my oxy/gas supplier with no answers . The head of this torch has a screw in fitting that I would like to know what is is used for.[ See the attached picture] Any Ideas? Thanks

 

[Eddyde]

Not 100%. sure but I have a similar torch and always thought it was a flashback arrestor.

 

[Uglydog]

I've never used a Harris.
But is an interesting question.
Is it #4, #5, #6 in this exploded view.

https://www.airgas.com/medias/HCL-9101150.JPG-1200Wx1200H?context=bWFzdGVyfHJvb3R8MTQ1ODM4fGltYWdlL2pwZWd8aDc5L2gyNy8xMTg0MDQwNDQ1NTQ1NC5qcGd8NjI0YTc5NTM3MDFmYThhZGRhOTE2N2NhOTRiNTI3NDU4YzA1MjUwMGExMDllYTM2NGU5YTEyZGExODU2MGQ1YQ

Daryl
MN

 

[aliva]

I've used that style torch years ago, never took the time to remove the screw. My best guess could be access to a check ball. It seems to be inline with the fuel tube of the torch mixer. Not really a flash back arrestor, as those are usually on the valve end of the torch body.
Why don't you open it up then we'll all know

 

[todd281]

I will take it apart tomorrow and post some pictures of what is in there. I had it apart once, many moons ago, but memory is not what it once was.

 

[Superburban]

Looks like it is a called an injector, to work with different gasses (does not look like you can change it, but so different torches can use common parts)

 

[todd281]

Ok here are some pictures of my torch head. It looks like it could be what Superburban said , the removable part has 8 small orifices surrounding it and one large one in the end. Interesting I will have to do some more research. thanks for the replies