![]() It will be a waste of energy and the flow velocity will be too fast to measure the flow rate.ģ. ![]() Therefore, we do not suggest you use a small flow meter on a large pipe. Smaller pipes will lead to higher flow speeds larger pipes, will lead to slower flow speeds. At any given flow rate, flow velocity is inversely proportional to the t cross sectional area of the pipe. Therefore, the flow meter should be installed where there is a stable flow stream locations.Ģ. Consistent Flow: Flow rate should be consistent throughout the pipe as long as there are no leaks or forks. ![]() The below formula shows the way to obtain flow rate with these 2 data points.Ġ.051² / 4X3.1415X1= 0.0020427604 m³/s (1m³=1000L, LPM stands for liters per minute.)ġ. How much is the flow rate when the fluid flows in a 2” pipe within 1 m/s flow velocity? ∙ Below is an example to explain the formula to calculate the flow rate. ➤ LORRIC AxleSense paddle wheel flow meters :0.15~10 m/s ➤ Paddle wheel flow meters of other brands:0.3~10 m/s ➤ Variable area flow meters :0.05~3.5 m/s Each flow meter uses a different theory of measurement: ∙ Here are the applicable flow velocity ranges of 3 different flow meters. Speaking of flow velocity, flow velocity is the speed of fluid flow, which is the distance the fluid moves in a unit time duration. Pipe cross-sectional area = ID² / 4 Xπ (ID stands for pipe inner diameter, π stands for Pi which is 3.14) Pipe cross-sectional area could be obtained by the following formula: With the below formula, we can understand the relationship between flow rate, flow velocity, and pipe diameter:įlow rate = Pipe cross-sectional area X Flow velocity ∙ Relationship between flow rate (LPM), flow velocity (m/s), and pipe diameter. As a result, users can use the relevant data to select the best flow meter.įirst, we are going to introduce the formulas. Through formulas and explanations provided, users can learn how to calculate this data. LORRIC’s engineering team created this article to help users obtain all the right data points. However, it is not uncommon for most users to not have all the data points necessary.
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