Why the suction linesize is greater than the discharge linesize?

Question

Accepted Answer

Suction linesize is greater than discharge linesize to prevent cavitation and ensure efficient flow.

Suction lines carry fluid from the source to the pump, requiring a larger size to accommodate the flow rate.
Discharge lines carry fluid from the pump to the destination, requiring a smaller size as the flow rate is reduced.
A larger suction linesize helps prevent cavitation, which is the formation of vapor bubbles due to low pressure, by reducing fluid velocity.
A smaller discharge linesize helps maintain higher pressure and efficient flow as the fluid is already pressurized by the pump.
Example: In a centrifugal pump system, the suction linesize may be 4 inches while the discharge linesize is 3 inches.

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