Author(s)

R. Verhoeven, L. Van Poucke, M. Huygens

Abstract

Waterhammer protection with air vessels A comparative study R. Verhoeven, L. Van Poucke, M. Huygens email : Ronny. Verhoeven@rug.ac.be Abstract As pressurized liquid transport systems need to be protected against waterhammer phenomena, different kinds of protection devices can be applied. Each of them has its own characteristics and advantages. In the whole scope of protec-tion installati- ons, air vessels certainly offer the best guarantee for safe pipe line operation under variable conditions. To meet all operational conditions different types of air vessels are commercially available. The most important ones are the classical air vessel with gas bubble, eventually equipped with a rubber balloon and with a single connection to the main pipe; the classical air vessel with double connection which acts as a flow through system. In a more recent ver-sion of an air vessel, the nor- mally isolated air bubble can be connected to the atmospheric pressure, again with a single or

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