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I am wondering would ye be able to help me out? I am instructed with the task of calculating the pressure drop and flow coefficient for a valve. Please see basic diagram attached for layout of valve. I need to find the pressure drop and flow coefficient when the ram is closed at different percentages. would ye be able to tell me the necessary equations that i need to do this. note internal diameter is 100mm at inlet and 50mm at outlet.The valve shown would be connected to the bottom a reactor etc. the pressure entering is set at 6 bar and the temperature is to be 100 C. i know that the fluid been tested is to be natural gas and also water, which i have the properties of both. is there any formula i could use to get a ruff estimate of valves for the flow coefficient and for the pressure drop.. badly stuck for this info? thanks in advance

Regards Dave

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# Calculate the flow coefficient and pressure drop through valve?

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