The advantages and disadvantages of centrifugal pumps and self-priming pumps respectively ？

When some customers first came into contact with our ATACH Pump Industry, they were often unsure whether to choose a self-priming pump or a centrifugal pump. 

Now we will explain in detail:

The core difference between a centrifugal pump and a self-priming pump lies in the ‌ self-priming capacity ‌ : a centrifugal pump needs to be filled with water before starting, while a self-priming pump can automatically draw water without the need for manual water addition each time. 

Here is a comparison of the pros and cons: ‌‌

The advantages and disadvantages of centrifugal pumps

Advantages : ‌ large flow and stable ‌ : suitable for conveying clear water, sewage and other liquids, pressure changes small. ‌ ‌ ‌ ‌

                         : small in size, light in weight, easy to maintain and low in equipment cost. ‌ ‌ ‌ ‌

                         : It can be used in high-flow scenarios such as urban water supply and factory drainage. ‌ ‌ ‌ ‌

Disadvantages : Before each use, it needs to be filled with water or evacuated; otherwise, the pump body is prone to damage. ‌ ‌ ‌ ‌

                               : when the liquid level rises, the efficiency will decrease significantly. ‌ ‌ ‌ ‌

                               : Low efficiency at low flow rate and high head, and difficult to manufacture. ‌ ‌

The advantages and disadvantages of self-priming pumps

Advantages : ‌ strong self-priming ability ‌ : after the first addition of water, it automatically starts to draw water, suitable for shallow water sources or environments with low liquid levels. ‌ ‌

 Simple operation and maintenance ‌ : The structural design is convenient for maintenance, and it runs smoothly with low noise. ‌ ‌ ‌ ‌

 Adapt to complex liquids ‌ : can convey liquids containing particles or with medium viscosity (such as slurries). ‌ ‌ ‌ ‌

Disadvantages  ‌ : ‌ takes up a large area during installation ‌ : the pump room and equipment area are required to be relatively large. ‌ ‌ ‌ 

 requires water filling for the first start-up ‌ : Water must be added manually for the first use, which is inconvenient for automation. ‌ ‌

 High sealing requirements ‌ : The water inlet pipe must not leak air; otherwise, it will affect the water absorption effect. ‌ ‌

How to choose?

 Select a centrifugal pump ‌ : scenarios where the water source is deep, a large flow rate is required (such as farmland irrigation, factory drainage), and it can accept water irrigation before startup. ‌ ‌

 Select self-priming pump ‌ : in situations where water sources are shallow, frequent starts and stops are required (such as household water, small-scale irrigation), or when transporting liquids containing impurities. ‌ ‌