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Selection of lining materials for corrosion resistant vacuum pump

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11:08 pm
November 30, 2020


yanyan

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posts 19

Selection of lining materials for corrosion resistant vacuum pump

Corrosion resistant vacuum pump is a kind of self-priming pump with liquid corrosion resistance and long service life. Its material must be special. The first characteristic is corrosion resistance. Next, we introduce the selection of lining materials for corrosion-resistant pump

It is necessary to satisfy the technical parameters of flow, head, pressure, temperature, NPSH and other technical parameters of corrosion-resistant vacuum pump products. It is necessary to satisfy the requirements of medium characteristics. F46, as the material of equipment fabric, absorbs a few touch substances in the process of application because there is a small space between F4 macromolecules, which is dispersed and relocated among them. The absorption image is usually shown by a small amount of weight gain and color change, and the amount of absorption increases with the increase of working pressure and touch time. In addition, it can be solved by lowering the temperature, shaking the scale and improving the planning.

In addition, the volume of pores between macromolecules increases with the increase of temperature, and liquid absorption and infiltration will also be added. Thus, the circulation effect at high temperature will cause the liquid absorbed by F4 to expand or transpiration, resulting in pores, and finally form damage. For example, after 34 months of operation, small spots appear on the surface of the pipeline of trichlorosilane rectification equipment, which will be carried out continuously in small shifts for one year. Therefore, this is the demand for F4 sheet as chemical anti-corrosion fabric. The lower the porosity content, the better. The specific gravity is necessary to be greater than 2.18, and the thickness is also required, usually 1.5 ~ 3 mm. The planned service life of the pump is usually at least 10 years. When determining the type and manufacturer of the pump, we should sum up and consider the pump's function, energy consumption, reliability, quotation and manufacturing standards.

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