Centrifugal pumpsThis is the translated text: "特征设计叶轮设计理想的高传输应用和需要通过可变流速管网泵送的水样流体。凭借其工程原理，很容易看出为什么许多操作员依赖离心泵进行各种常见流体处理应用。然而，我们都知道，不同的泵通常更适合不同的工作。"

螺杆泵在标准离心泵无法提供所需流量和能效，或者在处理高粘度液体和其他可能影响性能的材料方面存在问题的行业中越来越受欢迎。

Centrifugal pumps have been the default choice for many pumping applications for many years as they are the leading technology. The pumping method of accelerating the rotation of the impeller to push the water makes centrifugal pumps ideal for higher water volume transfer applications.

With relatively new technology, screw solar pumps can be a more reliable and efficient alternative to centrifugal pumps. Although the helical rotor pushes out relatively less water, it pumps out fluid at a fixed rate more consistently and efficiently. The following are the advantages of screw pumps and centrifugal pumps:

The structure is simple and compact. For the same conveying volume, the centrifugal pump occupies a small area, is light in weight, consumes less material, and has no high requirements on the foundation, so the manufacturing and installation costs are low. It can run at high speed and can be directly connected with a 2-pole or 4-pole motor. The transmission structure is simple and easy to install.

The output contains only the result: There is no valve in the centrifugal pump, so it is suitable for conveying suspensions. The special design can also convey suspensions of large solids. Pumps can be manufactured from materials resistant to chemical corrosion and suitable to deliver corrosion solutions. The output can be arbitrarily adjusted or even fully closed by the discharge valve, and there is no danger of the pressure head rising infinitely. Because of its uniform discharge and no pulse phenomenon, the amount of liquid to be transported is large. When the pressure head is not required to be large, the centrifugal pump is the most suitable.

Screw pumps contain multiple screws that mesh with each other as they rotate, creating a sealed cavity within the pump casing. As the screw drive turns, the fluid moves steadily and continuously through the pump. It produces a consistent volume flow independent of pumping pressure or viscosity that can slow down centrifugal pumps.

Some of the advantages of screw pumps include:

Versatility with different flow rates, pressures, liquid types, and viscosities.

Constant flow

High volumetric efficiency

Controllable output

Low internal speed

High resistance to entrained gas or air

Smooth and quiet operation

Very low pulsation

自吸特性 -> Self-priming characteristics

Reduce mechanical vibration