CV
	The Flow Coefficient, CV, is a dimensionless value that relates to a valve's flow capacity. Its most basic form is where Q=Flow rate and DP=pressure drop across the valve. The CV value increases if the flow rate increases or if the DP decreases. A sizing application will have a Required CV while a valve will have a Rated CV. The valve's rated CV must equal or exceed the required CV. CV can also be expressed one GPM of water at 70F when DP = 1.