Detailed Explanation of 20 Different Pump Types(1)

        Detailed Explanation of 20 Different Pump Types(1)

The performance parameters of a water pump indicate its performance. The performance parameters of pumps and their interrelationships are the basis for selecting pumps and adjusting flow rates. The performance differences of various pumps play a crucial role in their selection and use.

1、 Centrifugal pump

The pump casing is filled with liquid, and the impeller rotates at high speed. The liquid generates high velocity under the action of centrifugal force, and the high-speed liquid passes through the gradually expanding pump casing channel, transforming the dynamic pressure head into a static pressure head. Attention should be paid to preventing cavitation and air binding phenomena from occurring.

Performance characteristics: The centrifugal pump has a wide flow range, with stable flow and pressure without fluctuations.

Centrifugal pumps have a high rotational speed and can be directly connected to electric motors and steam turbines, with a simple and compact transmission mechanism.

Easy and reliable operation, easy adjustment and maintenance, and easy to achieve automation and remote operation.

Compared with reciprocating pumps with the same specifications, centrifugal pumps have a simple and compact structure, small volume, light weight, fewer components, easy manufacturing, low cost, and small footprint, so their equipment and repair costs are relatively low.

Centrifugal pumps have the following main drawbacks:

In general, before starting a centrifugal pump, it is necessary to fill the pump or use a vacuum pump to extract the air inside the pump. Although there is no need to pump before starting a self-priming centrifugal pump, there are still limitations in its current use.

The viscosity of the liquid has a significant impact on the performance of the pump. When the viscosity of the liquid increases, the flow rate, head, suction and efficiency of the pump will significantly decrease.

Centrifugal pumps are limited in their application under low flow and high head conditions. Because the flow channel of the small flow centrifugal pump is very narrow, it is difficult to manufacture and has low efficiency.