Page 162 - Valve Selection Handbook
P. 162
Check Valves 149
To avoid the formation of an excessively high surge pressure as a
result of the valve closing, the valve must close fast enough to prevent
the development of a significant reverse flow velocity that on sudden
shut-off is the source of the surge pressure.
Figure 4-11. Tilting-Disc Check Valve. (Courtesy of Edward Valves Inc.)
Figure 4-12.
Diaphragm Check
Valve with Cone-
Shaped Diaphragm.
(Courtesy or Nor/fiva/e
Engineering.)
