Typically seals are cooled by water as it passes through the pump. If the pump is dry or has insufficient water for priming it could damage the mechanical seal. Oil- lubricated and occasionally grease- lubricated seals are available on some pumps that provide positive lubricatin in the event that the pump in run without water. The seal is a common wear part that should be periodically inspected.Regardless of whether the application calls for a standard, high pressure, or trash every centrifugal pump lifts and discharges water in the same way. The following section will point out design differences between the pumps.
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