Specifications Galvanized Sheet Spiral Duct Connector Sizes are from Diameter 76mm to 100mm commonly. Can be specifical made.Forming by plasma cutting machine for materials, and Duct making machine, ...

Nominal sizes: 100, 125, 150, 200, 250, 315. For non-return air control. Fame made of galvanized sheet 0.8mm, inner shutter made of aluminum 0.3mm. For installation into round ducts. Specially ...

The result is a galvanized metal duct system with the fewest number of turns which limits friction losses and increases efficiency. Zinc in the galvanized coating of sheet metal duct actually kills ...

Proper sheet metal duct fabrication requires select tools, material understanding, and quality assurance adherence from hands-on trade experience—dedicated metal working courses speed skill building.

It’s no secret that SPIDA members and manufacturers are faced with tall tasks on almost a daily basis. Whether it be dealing with tight project timelines, difficult construction specifications, or ...

Saving labor was a priority in the 1970s as much it is today. One of the biggest developments in the ‘70s (and ‘80s) came from transitioning away from fabricating rectangular sheet metal duct ...