MSS SP-133-2005
MSS SP-133-2005
Excess Flow Valves for Low Pressure Fuel Gas Appliancesstandard by Manufacturers Standardization Society, 01/01/2005
standard by Manufacturers Standardization Society, 01/01/2005
The purpose of this document is to provide a standard practice for excess flow valves installed in low pressure fuel gas piping systems which are designed to protect the appliance and its connections to the piping system by reducing the flow of gas should the flow in the line exceed some predetermined level.