Vacuum pumps can basically be divided into two types, namely gas capture pumps and gas transfer pumps. It is widely used in metallurgy, chemical, food, electronic coating and other industries. With the development of vacuum applications, the types of vacuum pumps have been developed in many ways. The pumping speeds range from a few tenths per second to hundreds of thousands of liters per second and millions of liters per second. With the wider application of vacuum technology in the field of production and scientific research, the pressure range of its application is becoming wider and wider. Most vacuum pumps need to be composed of several vacuum pumps for common extraction to meet the requirements of production and scientific research processes. The application department is involved in a wide range of working pressures. Therefore, any type of vacuum pump cannot be fully applied to all working pressure ranges. Different types of vacuum pumps can only be used according to different working pressure ranges and different working requirements. . For ease of use and the needs of various vacuum processes, various vacuum pumps are sometimes combined according to their performance requirements and are used in unit type applications.
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