Many systems found in industrial environments contain gases and liquids at high temperatures or pressures, or fluids that are otherwise inherently dangerous, such as ammonia. Within these systems are components that break the boundaries of the system with moving parts, like the stem of a valve or the shaft of a pump. In order to prevent the fluid within these systems from escaping to the atmosphere, packing is installed that can seal the component yet still allow relative motion between its parts. It is important to understand how this packing works, how it is installed, and what must be done to maintain it in a proper working condition.
"State the purpose of packing.
Describe various packing configurations.
Describe the construction of various types of packing.
State the purpose of lantern rings and throttle bushings.
Discuss the proper method for renewing packing."
You will not be required to pass the knowledge check questions to move on to the next lesson. These will not be counted as a grade, but each question gives you insight into what you should have learned and the sorts of things you'll need to remember moving forward.
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