Analysis on Water Hammer Resistant Characteristics of Pipeline Valves

Abstract

A steady-state and transient analysis & study of valve piping flow in the refrigeration industry is conducted by considering eight commonly used valves through Flowmaster technology. The steady-state characteristics show that the double eccentric butterfly valve has the highest stability, and the triple eccentric butterfly valve has a larger flow space. In terms of simple transient characteristics, the concentric butterfly valve has the best water hammer resistant characteristics, followed by the triple eccentric butterfly valve. Conduct transient analysis of the closing characteristics of various commonly used valves, and considering two time periods of fast closing and slow closing, the fast closing time accounted for 25% and 14% of the whole process, and the opening degree of the fast closing was 0.6-0.3, which stimulated the first weak wave of the closing period, and the pressure wave value after the valve closing period decreased rapidly. Considering the non-full stroke, the fast closing stroke occupies 1/3-2/3 of the full stroke, which has a better pressure wave control effect. These provide the valve with a water hammer resistance strategy.