Oil seal vacuum pump should add what oil?

[Pump News Asia] oil seal vacuum pump is a typical type of vacuum pump: rotary vane vacuum pump. If you have been running will appear due to friction heat generated rotary vane wear increases, the life of the vacuum pump has a serious impact on the vacuum pump oil will increase the temperature, resulting in decreased viscosity, saturated vapor pressure will increase, will cause rotary-type Vacuum pump vacuum limit has declined, especially with the thermocouple measured total pressure. Such as enhancing ventilation and cooling, or improve pump performance, ultimate vacuum can be improved. Oil seal vacuum pump should add what oil? Vacuum pump oil substitution and mixing principle and oil exchange method Due to the oil supply is not timely or the lack of suitable varieties on the market and Other factors, vacuum oil in the course of the oil substitution occurs sometimes, the problem of mixing, including domestic oil and foreign oil , Different types of oil in domestic oil, different types of oil in different factories or different grades, new oil and the use of "old" oil mix and so on. At present there are many users in the choice of substitute oil or mixed with vacuum pump oil randomness, but be aware of different types of vacuum pump oil, its physical and chemical properties are different, its chemical composition, viscosity, acid value and various additives (Anti-wear agents, preservatives, antioxidants, rust inhibitors) and other major components and indicators directly affect the operation of machinery, if mixed use, its performance will change, not only related to the service life of the machine, and sometimes even Accident caused by improper lubrication. Therefore, substitute oil or mixed oil products should comply with the following principles, the use of caution: First, the principle of substitution of vacuum pump oil 1, try to use the same type of vacuum pump oil or similar performance, similar types of additives pump oil substitution. 2, the viscosity should be quite, the vacuum viscosity of the substitute oil to no more than ± 25% of the original oil viscosity is appropriate. In general, should give priority to the viscosity of the larger pump oil substitute. 3, the quality of high to low, that is, the use of a high-quality vacuum pump oil substitution, so more reliable lubrication of equipment. At the same time, but also extend the period of use, economically cost-effective. 4, the alternative pump oil should also be taken into account when considering the equipment's environment and working temperature. On the temperature changes in large machinery and equipment, alternative oil sticky temperature better; for low temperature work machinery, select the alternative oil pour point below the operating temperature below 10 ℃; and for high-temperature work of the machine, we must consider the substitution The flash point of oil should be higher, oxidation stability must also meet the requirements. Second, the principle of mixed use of vacuum pump 1, different types of grades, different manufacturers, old and new pump oil should be avoided in the general case of mixed use. 2, under the following circumstances, the vacuum pump oil can be mixed: (1) the same quality similar products of the same manufacturer, or high quality pump oil mixed with low quality pump oil is still used for the original use of machinery and equipment; (2) (3) different types of pump oil, if you know that the two are mixed pump oil are additive, or one is without additives, or Both oils add additives but can not react with each other, generally can be mixed, but for high quality pump oil quality will be reduced. Empty pump oil and other synthetic vacuum pump oil swap, the pump should be disassembled for thorough cleaning. Including all parts must be immersed in the replacement of oil to prevent contamination. 3, oil change vacuum pump should try to avoid pumping solvent, water vapor and corrosive gases, such as inhaling chemical gases and solvents, the vacuum effect of pump oil pollution, you must make cleaning oil change. Oil change should be used within the body of the pump exhaust, the new oil into the slowly rotate the pump shaft, clean up the exhaust drain pump row, repeated cleaning several times, and then wash into a new oil. Pump overhaul must use the solvent or detergent to clean the pump parts, and parts drying. Gas appliances must have special equipment, should not be filled with other oil or solvent container pump. (Editor: Li Juan)

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