Abstract
PRV size is determined based on the maximum and minimum flows. Oversizing of PRV may cause operational problems; unstable regulation, chattering, breakage, wire drawing of seats, and excessive wear in the nearly closed position. Undersizing of PRV, on the other hand, may damage the distribution system. Why is the size of PRY computed in an indirect manner in the optimization technique? For a given network, PRY optimization may result in different valve sizes, causing procurement problems from the manufacturer. While optimizing the size of PRV, practical aspects such as partial and intermittent flows and rapid filling of pipelines need special consideration from a pipeline safety point of view.
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