Page 95 - Mechanical Engineers' Handbook (Volume 4)

84 Fluid Mechanics

Figure 34 Loss coefficients for abrupt contract in
pipes.

Table 10 Typical Loss Coefficients for Valves and Fittings

Note: The k L values listed may be expressed in terms of an equivalent pipe length for a given installation and flow by
equating k L ƒL c /D so that L e k L D/ƒ.
Source: Reproduced, with permission, from Engineering Data Book: Pipe Friction Manual, Hydraulic Institute, Cleve-
land, 1979.