2000m³/h Vacuum Pump Manufacturer
Although liquid ring pumps belong to the category of rough vacuum pumps, they still have a large market in China's petroleum, chemical, electric power, textile, papermaking, pharmaceutical and other fields. Working principle of liquid ring pump: In foreign countries, the sales of liquid ring pumps account for 14% of the total vacuum pump market, second only to dry pumps. Since most liquid ring pumps are castings with low processing requirements, they are labor-intensive products. Therefore, domestic liquid ring pumps have a competitive advantage in price. The key is to improve design, reduce size and weight, increase efficiency, and lower energy consumption.
Slide Valve Pump
Due to the durability and reliability of slide valve pumps, various vacuum furnaces, coating machines, and drying, impregnation equipment at home and abroad use slide valve pumps as backing pumps. Working principle of slide valve pump: However, slide valve pumps have heavy castings and require significant processing work, so foreign vacuum manufacturers are seeking partners in China. To enable domestic slide valve pumps to enter the international market, it is necessary to further reduce pump vibration and noise, eliminate oil spray and leakage, and improve the reliability of long-term operation.
Direct-coupled Rotary Vane Pump
With the continuous expansion of vacuum technology in various application fields, the demand for direct-coupled rotary vane pumps is increasing. Due to the large quantity of such pumps, significant processing and assembly work, and low prices, some foreign vacuum manufacturers have established specialized factories in China. Domestic small and medium-sized direct-coupled rotary vane pumps have already passed technical standards, and their prices are much lower than foreign pumps, so domestic pumps still have a competitive advantage. The key is to solve the problem of shaft seal oil leakage, improve the quality and performance of vane materials and vacuum pump oil, ensure stable performance and reliable operation at high speed and high temperature, and further enhance the ability of domestic direct-coupled rotary vane pumps to remove water vapor.
Roots Pump
From the production situation of Roots pumps abroad, several major foreign companies, such as Leybold, Balzers, Alcatell, Edwards, and ULVAC, each have sales of Roots pumps accounting for no more than 5% of the global Roots pump sales, with the total of these five companies only 20%. The output of Roots pumps is not large, but the price of foreign Roots pumps is much higher than domestic pumps. Almost all large and small high vacuum and medium vacuum systems at home and abroad are equipped with Roots pumps to shorten pumping time and improve production efficiency. Therefore, domestic Roots pumps must strive to enter the international market on the basis of occupying the domestic market. To do so, it is necessary to further reduce the vibration and noise of domestic Roots pumps, thoroughly solve the problem of shaft seal oil leakage, improve the appearance quality of the pump, and enhance the internal smoothness and cleanliness. In addition, considering that the power frequency in some countries and regions is 60Hz, it is even more necessary to ensure the reliability of long-term operation of Roots pumps at increased speeds.
Domestic air-cooled direct-discharge atmospheric Roots pumps have made rapid progress and the technology is already mature. Since this type of pump is equipped with a gas cooler below the exhaust port, part of the cooled gas returns to the pump chamber through a pipeline to cool the rotors, thereby balancing the compression heat, so this pump can directly discharge to the atmosphere. To meet different ultimate vacuum requirements, this type of pump can be used in series. Generally, an air-cooled direct-discharge atmospheric Roots pump is added in front, achieving an ultimate vacuum one order of magnitude higher than the backing pump. Since there is no working medium in the pump chamber, this pump actually belongs to the dry pump category. This air-cooled direct-discharge atmospheric Roots pump and its unit have undergone long-term operation tests in petroleum, chemical, plastics, pesticide, turbine rotor dynamic balancing, aerospace space simulation and other devices, so it should be vigorously promoted and applied domestically.
