What should be noted when re - starting a chemical pump after long - term idling?

After long-term idling: 1) Inspect seals for drying or degradation, 2) Verify pump is primed (if self-priming), 3) Check for seized impeller from settled solids, 4) Lubricate if required, 5) Rotate shaft manually before startup, 6) Start at reduced speed if possible, 7) Monitor for unusual noise or vibration.