Roots vacuum pump: detailed explanation of Roots vacuum pump selection considerations
2020-12-13
Summary
Roots vacuum pump is a rough pump that uses liquid as the working medium and has been widely used in industry. In order to make the equipment play a better role, in addition to the preliminary work before selection, the following points should also be mastered: 1. The working pressure of Roots vacuum pump should meet the ultimate vacuum and working pressure requirements of vacuum equipment. 2. Correct selection of Roots vacuum pump operating point. Each pump has a certain working pressure scale, the working point of the pump should be selected within this range, and long-term operation under 10-8mmHg is not allowed.
Roots vacuum pumpIs the use of liquid as the working medium of the crude pump, has been widely used in industry. In order to make the equipment play a better role, in addition to the preliminary work before selection, the following points should also be mastered:
1. The working pressure of Roots vacuum pump should meet the ultimate vacuum and working pressure requirements of vacuum equipment.
2. Correct selection of Roots vacuum pump operating point. Each pump has a certain working pressure scale, the working point of the pump should be selected within this range, and long-term operation under 10-8mmHg is not allowed.
3. The Roots vacuum pump should be able to discharge all gases generated during the vacuum equipment under its working pressure.
4. Correct combination of vacuum pump. Because the vacuum pump has a selective pumping function, sometimes one type of pump cannot meet the pumping requirements, so it is necessary to combine multiple pumps to complement each other to meet the pumping requirements. In addition, some vacuum pumps cannot work at atmospheric pressure and require a pre-vacuum. Some vacuum pumps require a backup pump, because the outlet pressure of some vacuum pumps is lower than atmospheric pressure, so they need to be combined.
5. Vacuum equipment for oil pollution requirements. If the equipment is strictly required to be oil-free, various oil-free pumps should be selected. If the requirements are not strict, you can choose an oil pump, plus some anti-oil methods, such as cooling traps, baffles, traps, etc., to meet the requirements of clean vacuum.
6. Understand the composition of the gas to be pumped, whether the gas does not contain condensable vapor, whether there are particles and dust, whether it is corrosive, etc. When choosing a Roots vacuum pump, you need to understand the gas composition and select the corresponding pump for the pumped gas. If the gas contains steam, particles and corrosive gases, you should consider installing auxiliary equipment on the inlet pipe of the pump, such as condensers, dust collectors, etc.
7. How does the oil vapor discharged from the Roots vacuum pump affect the environment.
8. Will vibration during operation affect the process and environment? If the process does not allow, please choose a pump without vibration or adopt an anti-vibration method.
9. Roots vacuum pump price, operation and maintenance costs.
Through the aboveRoots vacuum pumpIn the introduction of the selection precautions, we understand that we need to master the pressure of the pump, the use environment and the selection of various accessories before use. It is specifically mentioned whether it has an impact on the environment, which will greatly help future operations.
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