CQZ self-priming pump

FAQ

1. How does a self-priming pump work?

A self-priming pump works by initially mixing air and water in its casing to create a vacuum. This vacuum draws more water into the pump, allowing it to push the air out through the discharge. Once all the air is expelled, the pump continues to operate as a regular centrifugal pump, moving water efficiently. This process allows the pump to restart and regain prime automatically if it loses prime during operation.

2.Why are centrifugal pumps not self-priming?

Centrifugal pumps are not self-priming because they rely on the continuous flow of liquid to operate. If air enters the pump, it disrupts the flow and prevents the pump from creating the necessary vacuum to draw in more liquid. Without liquid in the pump casing, centrifugal pumps cannot generate the suction needed to prime themselves, which is why they need to be manually primed or use external priming methods before operation.

3.What is the depth of a self-priming pump?

The depth, or maximum suction lift, of a self-priming pump typically ranges from 15 to 25 feet (4.5 to 7.5 meters), depending on the pump's design and specifications. This is the maximum vertical distance from the water source to the pump at which it can still effectively prime and draw liquid.