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1. What is a centrifuge and its function: A centrifuge is a machine that uses centrifugal force to separate liquid and solid particles or components of a mixture of liquid and liquid. The centrifuge is mainly used to separate the solid particles in the suspension from the liquid; or to separate the two liquids of different density and immiscible in the emulsion ( for example, separating the cream from the milk ) ; it can also be used to exclude Liquids in wet solids, such as wet clothes in washing machines; special ultra-speed tubular separators can also separate gas mixtures of different densities; use different density or granularity of solid particles to set different velocity in liquid, some sedimentation The centrifuge can also classify solid particles by density or particle size.
2. Centrifuge application fields: Centrifuges are widely used in chemical, petroleum, food, pharmaceutical, mineral processing, coal, water treatment and shipbuilding sectors.
3. How to choose a centrifuge :
There are many types and types of centrifuges , and the price is relatively expensive. When purchasing, it should be measured according to the work. Usually should consider the following factors:
(1) The purpose of centrifugation, analysis of centrifugation or preparation of centrifugation;
(2) The type and quantity of the sample, whether it is a cell, a virus, or a protein, the size of the sample. Based on these factors, decide whether to purchase an analytical centrifuge or a centrifuge; whether it is low speed, high speed or overspeed; is a large capacity, constant or micro centrifuge.
(3) Economic ability: When the model is determined, the manufacturer and price should be considered, and the performance of the price and product is synchronized.
(4) Other details: such as whether the centrifugal operation is simple, whether the maintenance is convenient, whether the design is outdated, and whether the wearing of the consumables is convenient.
(5) Matching problem: It is impossible for a centrifuge to operate at low speed, high speed and over speed at the same time. Generally speaking, the ultracentrifuge is limited to ultracentrifugation. It is not suitable for high speed centrifugation and it is not suitable for low speed centrifugation. The same high speed centrifuge is not suitable for low speed centrifugation. Therefore, if you want to buy a supercentrifuge, you should consider a high-speed centrifuge, otherwise you will not be able to take advantage. Generally speaking, the use of low speed and high speed is high, and the utilization rate of the ultracentrifuge is low. The ultracentrifuge is only used in the laboratory for frequent purchase or considering regional common settings.
After the model of the centrifuge is determined, what kind of centrifugal rotor is purchased. The most important basis for consideration is the capacity of the sample and the conditions of centrifugation. Usually there is one horizontal rotor and one corner rotor, or one large-capacity ( relatively lower speed ) rotor and one small-capacity high-speed rotor can meet the different needs of the work. Because there are many types of centrifugal rotors, many are similar, and the speed of the overspeed machine is quite expensive. It is not necessary if the price is all several times higher than the centrifuge mainframe. Due to the different prices of the rotating speed of the rotor, the price difference is very large. From the speed of rotation, it is not advisable to pursue the higher the better, but there should be a rotor with the highest speed allowed by the centrifuge, otherwise it is a waste for the centrifuge. Units with two centrifuges can be considered to save money by considering the complementary rotor models .