When is shut off head bad for a pump?

I currently have a system that has a discharge pressure of 248.1kPa with a suction pressure of 161.8kPa and discharge head of 91.23kPa. Is this something we should be worried about? I know generally you don't want to run a pump for a long period during shutoff. But since our shut off head is lower than then... show more I currently have a system that has a discharge pressure of 248.1kPa with a suction pressure of 161.8kPa and discharge head of 91.23kPa.

Is this something we should be worried about? I know generally you don't want to run a pump for a long period during shutoff. But since our shut off head is lower than then the discharge is this still a problem for the system or is shutoff head ALWAYS bad for pump?
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