Understand your own needs for centrifuges by learning about different types of centrifuges.

　　How to in Centrifuge Finding a centrifuge that’s suitable within this broad category isn’t something you can accomplish just by briefly reading the manual or asking a few questions to the centrifuge vendor—rather, it requires your own research.

　　Today, let’s explore the various types of centrifuges based on their classification.

　　Although centrifuges are widely used in various fields such as clinical medicine, biochemistry, immunology, and blood banks due to market demand, they are still most commonly found in laboratories.

　　Centrifuges can be classified into the following types based on different categories:

　　Desktop centrifuge and vertical centrifuge (floor-standing centrifuge).

　　Desktop and vertical centrifuges are primarily used to separate solid particles from liquids in suspensions, or to separate two immiscible liquids of different densities from an emulsion (for example, separating cream from milk). They can also be used to remove liquids from wet solids. Special high-speed tubular separators can even separate gas mixtures of varying densities. Leveraging the principle that solid particles of different densities or particle sizes settle at different rates in a liquid, certain sedimentation-type centrifuges can also classify solid particles according to their density or particle size.

　　By centrifugal method, they can be classified into filter centrifuges and sedimentation centrifuges.

　　This type of centrifuge is a centrifugal separator that uses either centrifugal filtration or sedimentation to separate components from a suspension. The drum wall of the filtration centrifuge is equipped with numerous pores, and the inner surface of the drum is covered with a filtering medium. When the suspension is introduced into the drum, it rotates along with the drum, generating tremendous centrifugal force. Under this pressure, the liquid phase in the suspension flows through the filtering medium and exits via the pores in the drum wall, while the solid particles are retained on the surface of the filtering medium, thereby achieving separation of solids from liquids. The centrifugal force generated within the drum is hundreds or even thousands of times greater than gravity, which significantly enhances the filtration process, accelerates the filtration rate, and produces filter cakes with lower moisture content. Suspensions containing solid particles larger than 0.01 millimeters can generally be effectively separated using filtration centrifuges. These centrifuges are widely used in industries such as textile dewatering, sugar production, salt manufacturing, and coal particle dewatering.

　　Based on centrifugal speed, centrifuges can also be classified into low-speed centrifuges, high-speed centrifuges, and ultrahigh-speed centrifuges.

　　The detailed speed classification is as follows: The dividing line for centrifuge speeds is 10,000 r/min. Centrifuges with a rotational speed of ≥10,000 r/min are referred to as high-speed centrifuges; those with a rotational speed of <10,000 r/min are referred to as low-speed centrifuges.

　　Of course, in addition to the centrifuge classifications mentioned above, there are also numerous other factors—such as whether or not it features refrigeration, its capacity size, and even its intended application—that can further divide centrifuges into hundreds of different types. Therefore, before purchasing a centrifuge, be sure to thoroughly research your specific needs and communicate with the centrifuge manufacturer accordingly, so you can select the model that best suits you.