Negative Suction Head

05/04/26

“How can pump suction pressure be negative?”

Pumps create a pressure difference to move fluids. When a pump has to lift a fluid to a given height, it must do so against atmospheric pressure. Therefore, the pump inlet must be below atmospheric pressure, resulting in a Negative Suction Head. If the head is too negative, then it can lead to cavitation and harm the pump.

• Engineering