Before installing casing wear rings, what preparation step is recommended?

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Multiple Choice

Before installing casing wear rings, what preparation step is recommended?

Explanation:
Cooling the wear ring before installation is recommended. Cooling shrinks the ring slightly, making it easy to drop into the casing without forcing it and risking damage. Once it warms back to normal temperature, it expands to create the proper interference fit and clearance between the ring, impeller, and casing. Heating would enlarge the ring and could misalign or damage components, while lubricating or greasing would leave residues that can contaminate the bore or seals. Cooling achieves the correct fit safely and consistently.

Cooling the wear ring before installation is recommended. Cooling shrinks the ring slightly, making it easy to drop into the casing without forcing it and risking damage. Once it warms back to normal temperature, it expands to create the proper interference fit and clearance between the ring, impeller, and casing. Heating would enlarge the ring and could misalign or damage components, while lubricating or greasing would leave residues that can contaminate the bore or seals. Cooling achieves the correct fit safely and consistently.

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