How do you calculate CF factor?
The coefficient for this recovery is the Critical Flow Factor. It is discovered by dividing the downstream pressure after vena contracta by the downstream pressure at vena contracta, then calculating the square root of that number.
What is a good p CF ratio?
15 to 20
Currently, the average Price to Cash Flow (P/CF) for the stocks in the S&P 500 is 14.05. But just like the P/E ratio, a value of less than 15 to 20 is generally considered good.
What does Cv value mean?
coefficient of variation
The coefficient of variation (CV) is the ratio of the standard deviation to the mean. The higher the coefficient of variation, the greater the level of dispersion around the mean. It is generally expressed as a percentage. The lower the value of the coefficient of variation, the more precise the estimate.
What does Cv stand for?
Curriculum vitae
Curriculum vitae/Full name
Curriculum Vitae (CV) is Latin for “course of life.” In contrast, resume is French for “summary.” Both CVs & Resumes: Are tailored for the specific job/company you are applying to. Should represent you as the best qualified candidate.
What is the coefficient of flow in flow coefficient?
Flow coefficient. For air flow at room temperature, when the outlet pressure is less than 1/2 the absolute inlet pressure, the flow becomes quite simple (although it reaches sonic velocity internally). With Cv = 1.0 and 200 psia inlet pressure the flow is 100 standard cubic feet per minute (scfm).
What is the flow coefficient of flow in scfm?
Flow coefficient. The flow is proportional to the absolute inlet pressure, so the flow in scfm would equal the Cv flow coefficient if the inlet pressure were reduced to 2 psia and the outlet were connected to a vacuum with less than 1 psi absolute pressure (1.0 scfm when Cv = 1.0, 2 psia input).
What is the flow coefficient at choked flow?
58% of the inlet pressure – p i – before the control valve. The flow coefficient at choked – or critical – flow can be expressed as: Non Critical Pressure Drop. For non critical pressure drop the outlet pressure – p o – after the control valve is more than 58% of the inlet pressure – p i – before the control valve.
What is the difference between δδp and flow coefficient Cv?
Δ P is the pressure drop across the valve (expressed in psi). In more practical terms, the flow coefficient Cv is the volume (in US gallons) of water at 60 °F that will flow per minute through a valve with a pressure drop of 1 psi across the valve. The use of the flow coefficient offers a standard method…