WebControl valves in steam and gas service can generate noise levels well in excess of plant standards, even at moderate pressure drops, especially in sizes above 3 or 4 inches. As a … WebDec 19, 2024 · Control valve CV refers to the flow coefficient of the valve. It applies to the factor of the head drop (Δh) or pressure drop (ΔP) over a valve with the flow rate Q. Table …
Control valves Cv in laminar flow - My Engineering Tools
WebThe Cv flow coefficient of a control valve can be calculated from the flow rate and the pressure drop through the valve. For liquids other than water the ratio of the fluid density to the density of water must also be used in the calculation. Where: Cv = flow coefficient Q = flow rate in US gpm ∆P = pressure loss in psi across the valve WebThe effect of specific gravity on gases is similar. For exam ple, the specific gravity of hydrogen is 93% lower than that of air, but it changes flow by just 74%. Carbon dioxide has a specific gravity 53% higher than that of air, yet it changes flow by only 24%. dr anthis ent
Catalog HY15-3502/US P.C. Flow Control Valve Technical …
WebMay 9, 2007 · Medium Viscosity = 500 - 20000 SSU (~100 - 4300 cps) This viscosity range is outside of typical centrifugal applications but can be moved by most all positive displacement pumps. ie. Gear, Piston, Diaphragm, Screw, … WebValves are tested by running water through it before publishing the Cv value. It can be assumed that the tests are done with water (unless otherwise noted), using a specific … WebThe effect of viscosity of fluids other than water should be considered when selecting the valve, as increased viscosity of fluid is reducing the valve capacity. dr anthis