We're going to demonstrate exactly where each of those fittings are used plus the other ways they may be represented on engineered drawings.

There are several different types of elbows determined by seam and joint kinds. As you may see this fitting also has a crimped stop making it possible for it to slide In the subsequent piece of duct.

Dampers are utilized to adjust the quantity in ducts. These are going to be utilized by the air balancing personnel to set the CFM required for your branch or main that includes a handbook volume damper.

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In addition to the spiral seam you will discover several other sorts of seams that run straight from a single stop to the other (longitudinally), for instance a longitudinal welded seam as demonstrated from the video clip below.

A saddle-tap does just as its identify implies, it saddles the key round duct. This really is accomplished by reducing a hole in the key duct exactly where the branch would be to come about after which the saddle-tap is fixed with sheet metal screws then sealed to deliver an airtight assembly.

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Some initiatives may enable very long runs of insulated aluminum flexible duct, but this isn't very good engineering exercise due to the higher resistance developed from by way of interior area, which creates a lot more static force losses and amplified Power Value.

Each individual so usually around the circumference of your seam a spot weld might be made to hold The 2 segments of the fitting collectively, offering it a much better bind then that used for an adjustable elbow.

In lieu of a spin-in or related beginning fitting, a flat saddle faucet can be used to receive round duct commenced in the aspect check here of a bit of rectangular duct. Readily available that has a forty five or 90-degree department.

You can find devices that lock segments or sections of a fitting with each other to produce a whole fitting. A few of these machines are referred to as Gore Lockers. Two segments are butted together and they are spun around as their seams are locked alongside one another via the gore locking device.