A– Yes, flex duct causes a small amount of turbulence inside because of its inherent design with the coiled wire. Because of this, it will not allow quite as much air in cubic feet per minute (CFM) as the same size metal duct. For example, one company’s sizing chart shows that 6...
CFM and should be placed clos- 15" Planer 500 est to your dust collector – result- obstructions), direction of Radial-Arm Saw 450 ing in better airflow and chip joists (for running pipe), Drum Sander electrical service, locations 6" Jointer 12" Planer 450 450 collection (see chart 1)...
In this particular case it is a pipe sizing chart. The flow through the pipe is 250 GPM. What is the pipe size in inches and flow velocity in feet per second (FPS) if the pressure drop (ft) per 100 ft of pipe must not exceed 4.0. From the chart the pipe size is 4 inches and ...