Blichmann burner heat shield

Brewers hardware has heat shielded thermowells if thats what you mean. If you use a controller instead of the standard thermometer, you have to worry about the hanging wire getting cooked (it has happened to me).

http://www.brewershardware.com/4-Heat-Shielded-1-2-MNPT-Stainless-Steel-Thermowell.html

 

Or do you mean the piece of metal that shields the sight glass and valve below?

http://www.highgravitybrew.com/productcart/pc/catalog/bm5_617_detail.jpg

I believe it comes with the kettle. It really is just a piece of metal, in which case you could probably just make one.

 

Gotcha, I've also seen the heat shield help stop liquid in the sight glass from boiling.

 

You should have a metal fabrication place in your area, I've got two local places in rural Vermont...go down and see if they have a piece of scrap, something like a 8" by 12" sheet of metal to act as heat shield. Hopefully they'll hook you up and you can throw them a couple dollars.

 

Here is a shield to protect ball valves/sight gauges:

http://www.brewhardware.com/accessories/110-heat-shield

It is pretty cheap, but telejunkie's recommendation to look for a piece of scrap makes a lot of sense.

 

I use this heat shield on my Boilermaker kettle site glasses and love it. I don't even bother with a heat shield on my ball valves.

 

hadn't seen that before...nice design. Now thinking about getting one of those.