Engineering ToolBox - Resources, Tools and Basic Information for Engineering and Design of Technical Applications! A major friction loss diagram for air ducts - Imperial units ranging 10 - 100 000 cfm.
Friction loss (head loss) in standard air ducts:
Download and print Air Ducts - Friction Loss vs. Air Flow and Duct Size Chart
The diagram is based on standard air
0.075 lb/ft in clean round galvanized metal ducts. 3 1 inch water = 248.8 N/m 2 (Pa)= 0.0361 lb/in 2 (psi) = 25.4 kg/m 2 = 0.0739 in mercury 1 ft 3/min (cfm) = 1.7 m 3/h = 0.47 l/s 1 ft/min = 5.08x10 -3 m/s 1 inch = 25.4 mm = 2.54 cm = 0.0254 m = 0.08333 ft Example - Friction Loss in Air Duct
The friction loss in a
20 inches duct with air flow 4000 cfm can be estimated to approximately 0.23 inches water per 100 feet duct as shown in the diagram above. The air velocity can be estimated to approximately 1850 feet per minute. Related Topics Systems for ventilation and air handling - air change rates, ducts and pressure drops, charts and diagrams and more. Related Documents Typical air duct velocities in applications like ventilation systems or compressed air systems. A major friction loss diagram for air ducts - in imperial units ranging 10 000 - 400 000 cfm. A major friction loss diagram for air ducts - SI units. Head loss or major loss in air ducts - equations and online calculator for rectangular and circular ducts - Imperial and SI units. Required duct area vs. air flow. Dimensions of thermoplastic pressure pipes. Dimensions of PE pipes based on controlled outside diameter. The equal friction method for sizing air ducts is easy and straightforward to use. Duct systems are commonly divided into three pressure classifications. Calculate velocities in circular and rectangular ducts - imperial and SI-units - online calculator. The velocity reduction method can be used when sizing air ducts. Ductwork air leakage classes. Calculate pressure loss - or head loss - in ducts, pipes or tubes. Rectangular equivalent diameter for air flows between 100 - 50000 cfm. Convert rectangular and oval duct geometry to a equivalent circular diameter - online calculator with imperial and SI-units. Calculate hydraulic diameter for pipes and ducts. A rough guide to maximum air volume capacity of circular ducts in comfort, industrial and high speed ventilation systems. Recommended air velocities in ventilation ducts Search
Search is the most efficient way to navigate the Engineering ToolBox.
About the Engineering ToolBox!
We don't collect information from our users. More about
This page can be cited as
The Engineering ToolBox (2008). Air Ducts - Friction Loss Diagram. [online] Available at: https://www.engineeringtoolbox.com/ductwork-friction-loss-d_1122.html [Accessed Day Month Year].
Modify the access date according your visit.