Blast Gate

thingiverse

This is a blast gate which I designed when we added ventilation to our workshop. One side is make to fit on standard 100mm metal duct with rubber seals, so the inside diameter is 101mm. The other side has 100mm outside diameter to take normal 100mm hose. I might add other diameters, as I still have some special requirement coming up. The design had being modular in mind.