Valve Cv Unit Conversion

Cv if air flow q(scfm) is known;

Valve cv unit conversion. 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 cv or its metric equivalent kv has been adopted universally as a comparative value for measuring the capacity of control valves. The flow of water through a valve at 60°f in us gallons/minute (gpm) at a pressure drop of 1lb/in².

The units of cv (in the us) are usgpm/(psi 0.5). Involves velocity, pressure, density and temperature as functions of. Cv = (25 gpm) (1 / (1 psi))1/2.

The cv was designed for use with liquid flows, it expresses the flow in gallons per minute of 60º f water with a pressure drop across the valve of 1 psi. For a specific gas control valve, the flow coefficient cg or kg is determined experimentally by control valve manufacturers, and you can found it in manufacturers technical specifications. Online calculator to quickly determine valve and orifice cv & kvs values for steam.

This article demonstrates how to convert between these two parameters when performing functions such as selecting a valve with an equivalent pressure drop to a given orifice plate. Kv = 0.865 · cv cv = 1,156 · kv (equivalence between flow coefficients kv and cv) Kv = 1us gpm *sqrt (1/1psi) kv = 0.227125 m3/hr * sqrt (1/0.06894757 bar) kv = 0.2271 * 3.808 * m3/ hr.

Kv or cv the si derived unit for voltage is the volt. Type in your own numbers in the form to convert the units! Kv m3/h flow rate parameter q3/h mvolume flow rate 3kg/m specific gravity p1 bar pressure before the valve p2 bar pressure after the valve ∆p bar pressure drop through the valve

For those who don't have crane 410 handy the conversion is cv = 29.9 * d^2 / sqrt(k) cv is usgpm and psi d is pipe inside diameter in inches ※2 calculation of viscosity correction is necessary when the fluid is liquid and the kinematic viscosity is 20 mpa・s or more and the calculated cv value is 0.01 or less. Conversion of kv in cv cv = 1,17 x kv conversion of cv in kv kv = 0,86 x cv explanations: