Cv Valve Unit Of Measure. In sap to measure the quantity of the material unit of measure is used. A valve’s rated fl varies with the valve and trim style, it may vary from.99 for a special multiple stage trim to.60 for a ball valve.
Concept of fixture unit weights with Olynyk, in my opinion, cv is not derived from any equation in particular, but empirically defined (and measured) as the flow rate which flows through a valve at a given travel referred to 1 psi of dp across the valve and water at room temperature; In the chart below, we show the approximate cv value of butterfly valves ranging from 2 to 24 and at various disc angles.
One bq is defined as the activity of a quantity of radioactive material in which one nucleus decays per second.
Concept of fixture unit weights with Valve sizing technical bulletin scope valve size often is described by the nominal size of the end connections, but a more important measure is the flow that the valve can provide. A valve has a published cv of 5.4 on 60°f water. A unit of measure for comparing valve flows.