WATER-HAMMER CHARTS FOR VARIOUS TYPES OF VALVES.

Abstract

The importance of the valve closure design on the magnitude of the water-hammer pressure produced by valve closure is demonstrated by means of an example. It is shown that the use of various approximate equations to compute this pressure can lead to unsafe estimates of the maximum transient pressure. Because reasonable estimate of this effect is often essential to good pipeline design, a series of charts are presented which can be used to given an accurate determination of the water-hammer pressure generated by a valve closure.