Rear insulators

[Gazz292]

Whats the deal with the back cap insulator (if that's the term for it)

My stock 26 size euro style torch on my sherman 206p has a white insulator ring on both sides of the torch head, i.e. one for the cup and one where the back cap screws through.

The Kennedy TTF17 i got today has an insulator only on the front part.

I can understand the insulator on the front part, it is part of the seal for the cup and to keep heat from melting the torch body, but why do some torches have a rear insulator, and some not.

 

[Barking Mat]

Gas leakage?

Pics might help?

 

[Popcorn]

It's just been put together by some who doesn't know what there doing Gazz, usually got the front bits wrong so they put the extra insulator on the back to take up the slack.
If you look at the pic's on the website you can see there's no insulator on the back of the torch.
https://weldes.co.uk/gb/tig-acdc-gtaw-welders/62-sherman-digitig-206p-acdc-inverter-welder.html

 

[Brad93]

Should only have an ceramic insulator on the cup side. The back cap should shroud any brass points and have a o ring to stop gas leakage