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Control Valve Sizing - CTi Controltech

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3-1Rev. 6/94CONTENTSIntroduction ........................................ ............ 3-1Nomenclature ........................................ ......... 3-1Calculating Cv for Liquids ............................... 3-3Liquid Sizing Examples .................................. 3-7Calculating Cv for Gases. ............................. 3-10Gas Sizing Examples ................................... 3-13Calculating Cv for Two Phase Flow ..............3-15Vapor Pressure Charts ................................ 3A-1Steam Tables.

When selecting a control valve for an application, the calculated C v is used to determine the valve size and the trim size that will allow the valve to pass the desired flow rate and provide stable control of the process fluid. Pressure Profile Fluid flowing through a control valve obeys the basic laws of conservation of mass and energy, and the

  Control, Rates, Flows, Flow rate

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