What is a self-priming pump?

The meaning of self-priming is: under the condition that the pump suction pipe is air, the negative pressure (vacuum) formed by the pump is used, and the pressure below the pumping port is increased by the pressure of the atmospheric pressure, and then discharged from the discharge end of the pump. . This process does not require the addition of "water diversion (guided water)". A pump with this capability is called a "self-priming pump."

Some centrifugal or rotary vane pumps must add “water diversion” to form a closed environment in the pump cavity before the water is pumped. Then the pump can operate to form a negative pressure and achieve the purpose of water absorption. For example, the manual pump used in the past in the countryside. Pumps that do not have self-priming ability, it is troublesome to add "drainage" before each water absorption.

The level of the suction process is related to the power, flow rate, and structure of the pump. However, the self-priming suction process of the micro pump is not easy to do. For example, the self-priming suction process of the micro-pump BSP27160 can reach 4 meters. Even higher.