Ductwork Fittings Chart

Smc manufactures coil line ductwork in 4 5 6 lengths.

Ductwork fittings chart. 9 3 pressure balancing. Tdc ductwork and fittings smacna recommended tdc duct is a 4 bolt system with a difference. δh 0 109136 q 1 9 d e 5 02 1. Return duct systems.

For rectangular ducts the equivalent diameter must be calculated. Get it as soon as thu aug 20. Powertec 70106 4 inch y fitting dust hose connector. A common value to remember is 0 0003 ft for standard galvanized material which is what the friction chart is based on.

D e equivalent duct diameter inches. The ashrae duct fitting database with cloud based access by annual subscription includes loss coefficient tables for more than 200 round rectangular and flat oval duct fittings. 5 0 out of 5 stars 6. Smc tdc slip drive and raw sheet metal connectors inc.

In over 50 years of serving the mechanical system marketplace mcgill airflow has gained a technical expertise which is unmatched in the industry. The ultimate faq guide what are the standard duct sizes. Therefore the pressure loss is 0 2149. Q air volume flow cfm cubic feet per minute.

Most standard duct sizes for rectangular ducts range from 35 40 inches to 3 7 inches depending on the airflow requirements per cubic foot. 4 piece duct please refer to the following charts for specific materials gauges and end treatments. Smk 10 x 10 x 10 duct wye branch hvac ductwork ac duct fittings. Smacna hvac systems duct design manual fourth edition december 2006 table a 1 pg a 4.

All ductwork comes standard with stiffening beads. 10 2 volume control dampers. 10 4 diffusers grilles registers. 9 2 central return.

10 3 fire and smoke dampers. Diameter for round ducts ranges from 4 9 inches to around 41 inches. 9 1 distributed return. It also depends on the airflow requirements per cubic foot.

The major loss or friction loss in a circular duct in galvanized steel with turbulent flow can for imperial units be expressed. δh friction or head loss inches water gauge 100 ft of duct. L shape duct all sizes shall be listed using outside dimensions. 10 1 duct fittings and transitions.

Duct fittings and terminal units. Example of duct fitting loss v u upstream velocity of fitting h height of the duct w width of the duct r radius of the bend θ angle of the radius calculate the pressure loss of the duct fitting in a 600mm w x 200mm h duct with a radius of 600mm and a 90 bend angle. 4 7 out of 5 stars 389. Rectangular duct and fittings are one part of our complete line of hvac products.

Featuring pictorial outlines of each fitting this database is useful to design engineers dealing with a variety of duct fittings. Rectangular single wall duct fittings sheet metal connectors inc. Only 6 left in stock order soon.