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Title: Excess Flow Valve Tests
Author: Roger F. Diehnel, Frank W. Maxwell
Source: American Gas Association 1992
Year Published: 1992
Abstract: PG&E tested excess flow valves (EFVs) from 8 manufacturers. The EFVs tested were designed to be installed at the inlet to a service line to minimize damage resulting from a service line rupture. Tfests were performed to determine the flow required to actuate the valves under various operating pressures, the bypass flow in the tripped position, and the differential pressures across the valve at the trip point and at the reset point and to observe any other characteristics that would be important in evaluating the use of the valves in our gas distribution system. In general, the valves performed in reasonable accord with the manufacturers specifications. However, we are not convinced that such performance would be beneficial to our system except possibly in special circumstances, and if used widely, might actually degrade overall system safety.

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