Packing case gaskets are a critical component to the packing case
assembly. Any damage to the gasket will cause leakage when the packing
case is installed in the stuffing box. Because of interaction of certain
gases on various metals, different materials are used in certain
applications. Copper is used in Air service, Inert gases, nitrogen, sweet
natural gas, methane, ethane, oxygen, argon and ethylene. Soft Iron is
used in sour natural gas, ammonia, and CO2. Monel is used in chlorine and
vinyl chloride. Aluminum is used when specified by the Original Equipment
Manufacturer.
