Oval Spiral Ductwork

Besides spiral products from standard tinsmith roofer supply corp offer a high level of air tightness hence preventing duct leakage.

Oval spiral ductwork. Flat oval spiral pipe is fabricated in spiral lock seam or longitudinal welded construction. This means 18 x 34 flat oval spiral duct will have the same friction loss as 25 7 round spiral duct. The spiral pipe is more energy efficient as it has lower airflow resistance. The system is first designed on the basis of circular duct.

So if you still look at spiral flat oval duct as an expensive rectangular duct with the corners rounded off you need to move out of the 1980 s and see the changes that have taken place in the last 25 years. To change the size first note the equivalent round size listed for 18 x 34 it is 25 7. Because of this spiral ducts can be manufactured with less heavy gauges than would be used in longitudinal rectangular ducts. Flat oval duct has been designed for restricted space conditions that cannot accept round spiral duct.

Nominal size mm base tube dia. Change 18 x 34 flat oval to a smaller size. The spiral lock seams used by round and oval ducts increase the ducts stringency. Sizes of flat oval spiral duct.

Maximum length 3 5m double corrugated. Backed by sate of the art manufacturing unit we have been able to develop a quality range of pre insulated double walled flat oval spiral duct this double walled insulated flat oval spiral duct includes an external pressure tight metal shell and a 12 5 25 50mm thick of fiberglass mineral wool puf insulation. Semco spiral round and flat oval duct systems provide you with the advantages of automation and mass production without the expense of investing in the required equipment. Round spiral duct is the best choice for duct construction but if you don t have the room flat oval is still a better choice than rectangular duct.

H x w h x w h x w. Applied end treatments can be e z flange with barrel clamp standard slip connection or angle iron rings. 150 x 940. Next find 25 7 for a flat oval with a smaller minor axis.

The design of a duct system utilising flat oval duct follows the same procedures used with rectangular duct. Unlike other types of ductwork spiral and oval offers optimal performance when lined or fabricated using a double wall system. These products can be custom built for your project or can be purchased through a stocking distributor in your area for common diameters and lengths. Another great advantage of flat oval spiral duct work is that the cost of operating them is relatively low.