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Positive displacement pumps and centrifugal pumps are two common types of pumps. They have some differences in working principles, performance characteristics, and application scenarios. Next, I will specifically introduce what these differences are.

Centrifugal pumps are the workhorses of numerous industries, facilitating the seamless transfer of fluids across a wide range of applications. At the heart of their functionality lies a series of precisely engineered parts, each playing a crucial role in ensuring optimal performance. In this article, we will delve deep into the key components of centrifugal pumps.

Multistage centrifugal pumps are a type of centrifugal pump that achieve high-pressure liquid transportation through the series operation of multiple impellers. Their core feature is "step - by - step pressurization". Each impeller (i.e., "one stage") gradually converts the kinetic energy of the liquid into pressure energy, ultimately reaching a relatively high discharge pressure. Multistage pumps are widely used in industries such as industry, municipal services, and energy. They are especially suitable for scenarios with high - head requirements, such as long - distance water conveyance, boiler feedwater, and mine drainage.

In the selection of centrifugal pumps, the type of impeller is a critical factor. Open and closed impellers have distinct characteristics, with significant differences in applicable scenarios. The following comparison from dimensions such as structure, efficiency, and media adaptability helps quickly understand their differences.