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VALVE SIZE GATE GLOBE, STOP CHECK SWING CHECK TILTING DISC CHECK AND LIFT CHECK Full Port Cv T Pattern Cv Y Pattern Cv Full Port Cv Min. Flow velocity Regular Port Cv Flow velocity for fully open (1) for fully open(1) ft/sec (water 60ºF) ft/sec (water 60ºF) 1 1/2 170 30 57 101 9.2 60 6.7 2 311 55 104 183 8.85 109 6.45 2 1/2 495 87 166 292 8. ...
The Flow Coefficiency (Cv) of a valve is the rate of gallons per minute of water at 60° F through a fully opened valve at a pressure drop of 1 PSI across the valve.
G = Specific gravity of fluid (water at 60°F = 1.0000) Thus, C v is numerically equal to the number of U.S. gallons of water at 60°F that will flow through the valve in one minute when the pressure differential across the valve is one pound per square inch. C v varies with both size and style of valve, but provides an
7 Ιουν 2018 · The global valves from the different Manufacturers may be changed in Cv values and the control characteristics. For the required accuracy of the process control, one can't just depend on turning hand wheel of the manual global valve to have the proper Cv.
Multiply Cv by factor. NOTE: Gate valves are not throttled. 0 1020 30 40 45 50 60 70 80 90 ... Flow data for angle valves use globe Cv times 1.25: Bronze Angles – 311, 335, 375, 376-AP Iron Angles – 818, 869, 831 Flow Data Cv Values for Valves VALVE SIZE. Created Date:
Cv is in imperial units; in metric units, the same coeficient (often called the Flow Factor) is Kv and corresponds to the flow rate of water in cubic meters (m3) per hour at a pressure drop of 100kPa (1 bar) at 20°C.
The valve flow coefficient (C v) is a convenient way to represent flow capacity of a valve across a range of fluids and process parameters. The C v calculator will calculate either C v or flow using the supplied additional parameters of fluid, inlet and outlet pressure, and fluid temperature.
