Search results with tag "Flow coefficients"
ABOUT Cv (FLOW COEFFICIENTS) - FNW Valve
www.fnwvalve.comCv for GASES The Cv formula for liquid flow can be modified for gas flow. However, since gases are compressible, they are affected by temperature. In addition, there are two flow conditions which must be considered, sub-critical flow, and critical (or choked) flow. If the upstream pressure (P1) is less than two times the downstream
FLANGED BALL VALVES ASME CLASS 150 & 300
www.collinspipe.comFlow Data The table at right provides flow coefficients for Jamesbury valves covered in this bulletin. Cv values represent the flow of water at +60°F through the valve in U.S. gallons per minute at a pressure drop of 1 psi. The metric equivalent, K v, is the flow of water at +16°C through the valve in cubic
CAST STEEL GATE, GLOBE, & CHECK VALVE FLOW …
www.fnwvalve.comCv 211 330 482 858 1,963 3,549 5,546 8,128 11,063 14,715 18,624 23,431 33,741 Flow coefficients are the same for both carbon steel and stainless steel bodies. Refer to main catalog for valve size offerings. Cv is the volume of water in U.S. gallons per minute that passes through the valve at a pressure drop of 1 PSI at 68°F. Cv is in
CRANE Iron Valves - AIV, Inc.
www.aivinc.com8 Flow Coefficients C V COEFFICIENTS* (For estimating purposes only) *Fully open. C V=GPM @ 1 PSI ∆P, 60°F Water The above values for Swing Check Valves are correct only when the valve is fully open.
Flow Coefficients and Computations
engvalves.comCv rating Rate of flow depends upon the pressure drop. Cv is the amount of flow in gallons per minute through a valve which results in a 1 psi pressure drop. Throttling characteristics are shown in the same manner with Cv’s at various openings. Use formula shown below to compute actual flow at various pressure drops. Weir Valve Cv Ratings