How to calculate the regulating valve for gravity-fed pipelines?
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As the title suggests, for a gravity-fed control valve where both the pressure before and after the valve is at atmospheric pressure, how should one calculate the parameters and select the valve size?
What is its valve position? First, it is necessary to determine the length and diameter of the pipe for gravity-driven flow, and to calculate the temperature, air pressure, and density of the fluid. Then, the pressure of the fluid is calculated using Bernoulli’s principle. Finally, given the flow rate, the valve position of the pipeline control valve can be calculated based on the pressure difference and the density of the fluid. -
The pressure before the valve is based on the hydrostatic pressure, while the pressure after the valve is set at a minimum value (determined by the manufacturer). Typically, such valves have the same diameter as the pipeline