What is CV in gas?
Valve Flow Coefficient (Cv) is a valve’s capacity for a liquid or gas to flow through it. It is technically defined as the volume of water at 60F (in US gallons) that will flow through a valve per minute with a pressure drop of 1 psi across the valve.
Does pressure change with pipe diameter?
“In a water flowing pipeline, if the diameter of a pipe is reduced, the pressure in the line will increase. Bernoulli’s theorem says that there should be a reduction in pressure when the area is reduced. The narrower the pipe, the higher the velocity and the greater the pressure drop.
How do you calculate pressure from pipe and flow rate?
The flow rate, in turn, at a known pipe cross-sectional area, determines the fluid’s flow rate. Subtract static pressure from the total pressure. If the pipe has a total pressure of 0.035 kilopascals and a static pressure of 0.01 kilopascals: 0.035 – 0.01 = 0.025 kilopascals. Multiply by 2: 0.025 x 2 = 0.05.