What does Valve CV mean?
flow coefficient
What is the CV value of a valve?
Cv by definition is the number of gallons per minute (GPM) a valve will flow with a 1 psi pressure drop across the valve. For example a valve with a Cv of 10 will flow 10 GPM with a 1 psi pressure drop.
How do you calculate the flow coefficient of a valve?
Control Valve SizingControl Valve Sizing. When sizing a control valve, the most common approach is to calculate the flow coefficient, Cv which is a measure of the capacity of the valve body and trim. C = Q/N1 * (1/0) / (P)1/0 is the relative density.Fluid Density: 965.4 kg/m3.Flow Rate (Q): 360 m3/h.C = Q/N1 * (1/0) / (P)
What is gas flow rate?
A gas flow rate is the volume of gas that passes a particular point in a particular period of time. Gas flow rate calculations are used extensively in the disciplines of chemical engineering and process engineering.
What is the relation between flow rate and pressure?
Fluid velocity will change if the internal flow area changes. For example, if the pipe size is reduced, the velocity will increase and act to decrease the static pressure. If the flow area increases through an expansion or diffuser, the velocity will decrease and result in an increase in the static pressure.
What is the relation between pressure and flow?
Bernoulli’s equation states mathematically that if a fluid is flowing through a tube and the tube diameter decreases, then the velocity of the fluid increases, the pressure decreases, and the mass flow (and therefore volumetric flow) remains constant so long as the air density is constant.
How is flow rate calculated?
If you can see the fluid flowing, you can measure its velocity, and that means all you need is the area through which the fluid is flowing to calculate the flow rate using the formula Q = A × v.
What is normal water flow rate?
A toilet will normally use about 2-3 gallons per minute (gpm), a shower from 1.5 to 3.0 gpm, a bathroom or kitchen faucet from 2-3 gpm, a dishwasher from 2-4 gpm, and a washing machine from 3-5 gpm.
What is flow meter and types?
PD flow meters include piston meters, oval-gear meters, nutating disk meters, rotary vane type meters, etc. Positive displacement flow meters are known for their accuracy. They are commonly used in the transfer of oils and fluids, like gasoline, hydraulic fluids as well as in-home use for water and gas applications.
What are different types of flow?
There are Six different types of fluid flow:Steady and Unsteady.Uniform and Non-Uniform.Laminar and Turbulent.Compressible and In-compressible.Rotational and Ir-rotational and.One, Two, and Three -dimensional Fluid Flow.
What are types of flow meter?
Types of Flow MetersCoriolis Meters.DP Meters.Magnetic Meters.Multiphase Meters.Turbine Meters.Ultrasonic Meters.Vortex Meters.
