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Pump Operation Standby Cycles

Pump Operation Standby Cycles

(OP)
I'm going to ask this question a couple ways.
In a wastewater pump station, how long should a standby or spare pump be allowed to stand without operating?
Or, at what interval should should the lead-lag pumps be switched?

RE: Pump Operation Standby Cycles

The pumps are set up in a lead/lag arrangement with automatic alternation after each pump cycle to balance run times an minimize starts per hour.

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