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A vacuum pump is a device that uses mechanical, physical, chemical, or physical-chemical strategies to pump air out of a container to create a vacuum. In general, a vacuum pump improves, generates, and maintains vacuum in a closed space through various means. There are two types of vacuum pumps based on their operating principle, namely gas catch pumps and gas transfer pumps. Vacuum pumps are widely used in metallurgy, chemical industry, food, electronic coating, and other industries.
Liquid Ring Pump
Although the liquid ring pump belongs to the crude vacuum pump, it still has a significant market in China’s petroleum, chemical, electric power, light textile, papermaking, medicine, and other fields. Overseas, liquid ring pump sales account for 14% of all vacuum pump markets, second only to dry pumps. Water ring pumps are mostly cast, so application requirements are not high and belong to labor-intensive products. Therefore, domestic liquid ring pumps have a price competitive advantage, and the key is to improve the design, reduce volume, lose weight, improve efficiency, and reduce energy consumption.
Sliding Valve Pumps
Because of their durability and reliability, sliding valve pumps are used for front-stage pumps in various vacuum furnaces, film plating devices, drying, soaking, and other equipment at home and abroad. In order to make the local slide valve pump enter the international market, it is necessary to further reduce the vibration noise of the pump, prevent oil injection and oil leakage, and enhance the reliability of the slide valve pump in long-term operation.
DC Rotary Vane Pump
With the continuous growth of vacuum technology in various application areas, the demand for DC rotary vane pumps is increasing. Because this type of pump has a large volume, the application, and assembling workload is significant, and the cost is low, some foreign vacuum manufacturers establish special manufacturing plants in China. Domestic small and medium-sized straight league rotary vane pump technically already complete, prices are far cheaper than foreign pumps, so domestic pumps have a competitive advantage. The key is to solve the shaft seal leakage and rotary vane textiles and vacuum pump oil performance quality problems, ensure that the right league pump in high-speed, high-temperature performance is stable and reliable operation, and to further enhance the domestic right league rotary vane pumps besides water vapor ability.
Roots Pump
According to the production situation of roots pumps abroad, several large foreign companies, such as Leybold, Balzers, Alcatell, Edwards, and ULVAC, each of which accounts for less than 5% of the global sales volume of roots pumps. These five companies only account for 20%. At home and overseas, almost every large or small, high vacuum and vacuum system, in order to shorten the extraction time and increase the production efficiency, are equipped with roots pumps. So domestic roots pumps need to occupy the local market to enter the international market, on the other hand, also considering the power frequency is 60 Hz in some countries and regions, ensuring stable and reliable operation in the case of increasing speed pump long-running reliability.
Water Ring Pump
Water ring vacuum pump (water ring pump) is a kind of crude vacuum pump. The ultimate vacuum it can achieve is 2000~4000Pa, and the series air ejector can reach 270~670Pa. Water ring pump can also be used as a compressor, called a water ring compressor, which is a low-pressure compressor. Its pressure range is 1~2*105Pa pressure meter. Water ring pumps were originally used as self-priming pumps but have since been used in many industries such as oil, chemicals, machinery, mining, light industry, medicine, and food. Because the gas compression in water ring pump is isothermal, it can remove inflammable and explosive gas, and also can remove the gas containing dust and water. As a result, the application of water ring pump is increasing day by day.
Model Selection
The function of a vacuum pump is to remove the gas molecules from the vacuum chamber, reduce the gas pressure in the vacuum chamber, and make it reach the required vacuum degree. In order to achieve optimal configuration, the following points should be taken into consideration when deciding on a vacuum system:
1. Check and determine the required vacuum for each process.
2. Examine the limit vacuum level of the vacuum pump system based on determining the required vacuum degree since the limit vacuum level of the system determines the best working vacuum level of the system.
3. Examine and determine the type and quantity of gas extraction required by the procedure.
4. Check to determine the time required to achieve the required vacuum, the stream resistance, and leakage of the vacuum pipe.
5. Consider the removal rate required to maintain the vacuum under certain technological conditions after the required vacuum degree is reached.
FAQs
1. What is a vacuum pump and what is its function?
2. What are the different types of vacuum pumps and their application areas?
3. What factors should be considered when selecting a vacuum system?
4. How can water ring pumps be used as a compressor?
5. How can the vibration noise of a sliding valve pump be reduced?