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Chinese2. Correctly combine the car air pump. Due to the selective pumping of automobile air pumps, sometimes one type of pump cannot meet the pumping requirements, and several pumps are required to be combined to complement each other to meet the pumping requirements.
For example, the titanium sublimation pump has a high pumping speed for hydrogen, but cannot pump helium, while the three-pole sputtering ion pump (or the two-pole asymmetric cathode sputtering ion pump) has a certain pumping speed for argon. Combined, the vacuum device will get a better vacuum degree. In addition, some vacuum pumps cannot work under atmospheric pressure and require pre-vacuum; some vacuum pumps have an outlet pressure lower than atmospheric pressure and require a fore pump, so they all need to be used in combination.
3. Requirements for oil pollution of vacuum equipment. If the equipment is strictly required to be oil-free, various oil-free pumps should be selected, such as: water ring pump, molecular sieve adsorption pump, sputtering ion pump, cryogenic pump, etc. If the requirements are not strict, you can choose an oil pump, plus some anti-oil pollution measures, such as adding cold traps, baffles, oil traps, etc., can also meet the clean vacuum requirements.
4. Understand the composition of the pumped gas, whether the gas contains condensable vapor, whether there is particle dust, whether it is corrosive, etc. When choosing a vacuum pump, you need to know the gas composition and select the corresponding pump for the gas to be pumped. If the gas contains vapors, particles, and corrosive gases, it should be considered to install auxiliary equipment such as condensers, dust collectors, etc. on the inlet pipeline of the pump.
5. How does the oil vapor discharged from the car air pump affect the environment? If the environment does not allow pollution, you can choose an oil-free vacuum pump, or discharge the oil vapor to the outside.
6. Whether the vibration generated by the automobile air pump has any influence on the process and the environment. If the process does not allow, choose a pump without vibration or take anti-vibration measures.
7. The price, operation and maintenance cost of automobile air pump.
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