A Self Actuation Gas Line Safety Device

WHY IS IT USED?

The Excess Flow Valve (EFV) is used to automatically stop the flow of gas in cases of a ruptured gas line. Broken gas lines can occur with excavation machinery, extreme ground movements (such as earthquakes), drilling, digging and other accidential breaks of gas lines or regulators.

HOW DOES IT WORK?

An EFV operates similar to electrical circuit breakers that trip when the electricity current exceeds its limit. The EFV is tripped by an excess flow of gas, causing the spring to shut-off the flow. The valve is reopened when the excess flow has ceased or the correct pressure is regained.