Blast Gate

[James Cogbill]

Can anybody recommend a good brand of blast gate for my exhaust system that vents my laser cutter? I need something with very tight connections, preferably plastic; and 5" diameter.

[Gary Hair]

Can anybody recommend a good brand of blast gate for my exhaust system that vents my laser cutter? I need something with very tight connections, preferably plastic; and 5" radius.

I think you meant diameter and I have not seen 5" - usually they are 4" or 6" and the really big systems have 8". Here is one at Woodcraft but you can get them practically anywhere.
http://www.woodcraft.com/Product/200...4-inch-OD.aspx

[Ernest Martin]

I've seen some decent ones at our local hardware store I would imagine a place like Lowes or Home Depot would probably have something

[Mike Null]

As Gary indicated, I bought my 4" at WC. I attached it to the exhaust port of the laser which then goes to a 6" pipe where my in-line blower is mounted.

[Tony Lenkic]

James,

If you have Lee Valley store in your proximity they list 5" blast gate on their site.
In Canada Busy Bee woodworking machinery have them in metal or plastic.