Does Valve Cv Have Units. The use of the flow coefficient offers a method of of comparing. Select a valve select a valve with enough flow to meet your demand at the available pressure differential available pressure at valve model # min flow min flow to 5 1020304560 100 rate asse 1017 flow rate in gpm 431 0.5 4 7.5 11 16 20 25 29 38.5
The flow coefficients are in general determined experimentally and express the. A valve cv can be described as the number of gallons per minute (gpm) at 60 o f (15.5 o c) that will pass through a valve with an associated pressure drop of 1 psi. A gate valve is the most common type of valve used in any process plant.
Therefore, it is important that engineers have a solid understanding of the available data to prevent components from being oversized or undersized in pneumatic systems.
In other words, flow capacity is a measure of efficiency at allowing liquid to flow. It can be complicated to replicate a closure profile between differing loss models. Gallons per minute that passes through a valve at a pressure drop of 1 psi. Thus a cv flow coefficient of 10 indicates that a 1.0 psi pressure drop will occur with a 10 us gpm of water throughput through the valve.