# Control Valve Cv Chart

### This calculator can be used to help select a valve with enough flow capacity for a given application.

Control valve cv chart. Control valve cv refers to the flow coefficient of the valve. The characteristic of the control valve chosen for an application should result in a direct relationship between valve opening and flow, over as much of the travel of the valve as possible. Control valve and instrumentation terminology.

Pressure profile fluid flowing through a control valve obeys the basic laws of conservation of mass and energy, and the They express coefficient cv/kv as the flow rate of water in g.p.m. Choosing the valve “series” your next step is to choose a basic valve design to do the job.

The flow coefficient c v for a water control valve can be estimated with the diagram below:. Determine the piping geometry factor (f p) and the liquid pressure recovery factor (f lp). In deciding the size of the control valve that (port size) we need to calculate the cv value of the process (calculated cv) by calculating cv has educated more than 50 years, which is involved in.

The valve flow coefficient (c v) is a convenient way to represent flow capacity of a valve across a range of fluids and process parameters.the c v calculator will calculate either c v or flow using the supplied additional parameters of fluid, inlet and outlet. Chapter 4 describes digital valve controllers, analog positioners, boosters, and other control valve accessories. This section will consider the various options of valve characteristics for controlling water and steam systems.

A valve cv can be described as the number of gallons per minute (gpm) at 60 o f (15.5 o c) that will pass through a valve with an associated pressure drop of 1 psi. These excel® workbooks are intended as full function control valve sizing applications. Gallons per minute of water at 60°f that will flow through a control valve at a specified opening when a pressure differential of 1psi.

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. The flow coefficient for a control valve which in full open position passes 25 gallons per minute of water with a one pound per square inch pressure drop can be calculated as:. It’s the right tool for finding the right product, every time.

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