With today’s mandate for reduced fugitive emissions and improved air quality in industrial valves, proper installation of stem packing has become critical. But the importance of effective sealing by packing in the stuffing box goes beyond volatile operations where leakage can be hazardous It also applies to applications such as steam and low-temperature inert services. Stem packing leakage in non-fugitive emissions applications can be expensive because of product loss and a reduction of operating efficiency. It all comes down to proper installation with precisely the right material.
Many associations, societies and regulatory agencies have rewritten and redeveloped emissions and leakage standards and controls year after year. When the process rules are changed, manufacturers of seals, packing and gaskets are forced to implement changes as well. The manufacturers either produce seals that are better suited to handle the new regulations or they drop out of the market. These changes affect the way end users must look at the quality of flexible graphite and its ability to seal. Click here to read more.