excess flow valve मीनिंग इन हिंदी

Cost is certainly no obstacle for a device called an excess flow valve, which prevents gas from building up in a house if a service line is ruptured.
And the Office of Pipeline Safety has questioned the workability of another proposal now on the NTSB's list of most-wanted safety improvements : require the installation of excess flow valves that would automatically shut off natural-gas distribution systems in residential areas.