Steam Valve Lubrication: The Key to Optimal Performance

What is the appropriate lubricant for the stem of a steam valve?

a. Graphite

b. Oil

c. Grease

d. Silicone

Final Answer:

The appropriate lubricant for the stem of a steam valve is graphite.

Graphite is the best lubricant for the stem of a steam valve due to its high-temperature tolerance and anti-galling properties. It can withstand the extreme conditions present in a steam valve, ensuring smooth operation and preventing galling, which can lead to damage and malfunction. Graphite's ability to withstand heat and pressure makes it the ideal choice for lubricating steam valve stems.

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