Final answer:
Lubricated plug valves depend on the lubricant to provide a tight seal between the plug and the body of the valve.
Step-by-step explanation:
Lubricated plug valves depend on the lubricant to provide a tight seal between the plug and the body of the valve.
This type of valve is commonly used in applications where there is a need for a tight and reliable shutoff, such as in petroleum refineries, oil and gas pipelines, and chemical processing plants.
The lubricant helps reduce friction between the plug and the body, allowing for smooth operation and preventing leakage.
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