Structural characteristics and principle of multistage pump

Today, we're diving into the structural characteristics and working principle of multi-stage pumps. As a leading manufacturer, Zhongheng offers self-priming pumps that are widely used in various industrial applications. In this article, we'll explore how multi-stage pumps work and why they are essential for high-pressure fluid transfer systems.

A multi-stage pump is essentially a series of single-stage pumps connected in sequence. Each stage increases the pressure of the fluid as it moves through the system. The impeller at each stage is designed to direct water upwards, enabling the pump to lift liquid to greater heights based on the number of stages. The assembly of these components is crucial, as even minor misalignments can significantly affect performance, reducing flow and efficiency. This is especially important after maintenance, where precise reassembly is required to ensure optimal operation.

The main components of a multi-stage pump include the inlet and outlet sections, impellers, guide vanes, shaft, seal rings, balance discs, bushings, tail caps, and bearing housings. The impeller, typically made from high-quality cast iron, has blades that allow fluid to enter axially. Due to the pressure difference on either side of the impeller, an axial force is generated, which is counteracted by the balance disc. During manufacturing, the impeller undergoes a static balance test to ensure smooth operation.

The seal ring, also made of cast iron, prevents high-pressure fluid from leaking back into the suction side. It is a wear part and can be replaced when necessary. The balance disc, made from wear-resistant material, helps stabilize the impeller and protect the shaft. These parts are all critical to maintaining the pump’s efficiency and longevity.

The shaft, constructed from high-quality carbon steel, connects the impeller and is secured with keys, bushings, and nuts. One end is linked to a coupling that connects directly to the motor. The entire system relies on precise engineering to function efficiently.

Multi-stage pumps operate on the principle of centrifugal force. When the impeller rotates, it creates a vacuum that draws in fluid. As the fluid moves through the pump chamber, it is compressed and then expelled through the discharge port. This cycle of suction, compression, and discharge allows the pump to achieve high pressure and is why it's commonly used in applications requiring significant lift or pressure.

In summary, multi-stage pumps are complex yet highly efficient machines that rely on careful design and precise assembly. Whether you're looking for information on pump valves, ball valves, or butterfly valves, understanding the basics of multi-stage pumps is essential for proper selection and maintenance. For more details, visit our website to learn more about multi-stage pump technology and related valve solutions.

Medical Industry Mass Flow Meter

Sealand is a professional manufacturer of Medical Mass Flow Meter, Medical Mass Flowmeter, Medical Coriolis Meter, Medical Flow Meter, Medical Flowmeter, ATEX, IECEx & CE approved.

There are 2 optical switches for operation. The SET and SELECT optical switches are used to navigate the transmitter display. To activate an optical switch, move your finger 1~2mm over the optical switch close to the glass.

Medical Mass Flow Meter, Medical Mass Flowmeter, Medical Coriolis Meter, Medical Flow Meter, Medical Flowmeter

Zhejiang Sealand Technology Co., Ltd. , https://www.sealandflowmeter.com