In the purchase process of liquid ring vacuum pump system, in order to ensure its quality, it is necessary to meet the requirements of all performance tests. In addition, we need to pay special attention to its model selection, because the performance of different models of equipment is different in the use effect. So, what are the specific precautions for the selection of liquid ring vacuum pump system?
What should be paid attention to when selecting the liquid ring vacuum pump system
1. Will the vibration produced by the liquid ring vacuum pump system affect the production process and environment? If it is not allowed, the vibration pump shall not be selected or anti vibration measures shall be taken.
2. Understand the extraction of gas components, the gas does not contain condensed steam, whether there is particle dust, whether there is corrosiveness. When selecting the water ring vacuum unit, it is necessary to know the composition of the gas and select the corresponding pump for the selected gas. If the gas contains steam, particles and corrosive gas, auxiliary equipment such as condenser and dust remover shall be installed on the suction pipe of the pump.
3. Under working pressure, the liquid ring vacuum pump system shall be able to drain all gases generated in the process of vacuum equipment.
4. Correctly combine the liquid ring vacuum pump system. Because of the selective suction of liquid ring vacuum pump system, sometimes one pump can not meet the requirements of suction, so many pumps are combined to meet the requirements of suction. For example, titanium sublimation pump can pump hydrogen with high pumping rate, but it can’t pump helium, but triode type sputtering ion pump (or two polarity asymmetric cathode sputtering ion pump) argon has a certain pumping speed, and the combination of the two will make the vacuum equipment get better vacuum. In addition, some liquid ring vacuum pump systems cannot work under atmospheric pressure and need pre vacuum; some liquid ring vacuum pump systems need pre stage pumps because the outlet pressure is lower than the pressure, so the funds need to be used in combination with the use of pumps.
5. Requirements of vacuum equipment for oil pollution. If the equipment has strict requirements for oil-free, various non oil pumps should be selected, such as water ring pump, molecular sieve adsorption pump, sputtering ion pump and low temperature pump. If the requirements are not strict, oil pumps, cooling valves, baffles, oil traps and other anti oil pollution measures can be selected, which can also meet the requirements of clean vacuum.
6. Select the working point of liquid ring vacuum pump system correctly. Each pump has a certain range of working pressure, such as: the working pressure range of 2BV series liquid ring vacuum pump is 760 mm Hg ~ 25 mm Hg (absolute pressure). In such a wide pressure range, the pumping speed changes with the pressure (refer to the performance curve of the pump in detail), and its stable working pressure range is 760 ~ 60 mm Hg. Therefore, the selection of pump working point in this range is not suitable for long-term operation below 25-30mmhg.
7. How does the oil vapor discharged from the liquid ring vacuum pump system affect the environment? If the environment is not allowed to be polluted, you can choose the oil-free vacuum pump or the oil vapor discharged to the outdoor.
8. The working pressure of liquid ring vacuum pump system shall meet the requirements of vacuum and the working pressure of vacuum equipment. For example, the vacuum drying process needs 10mmhg working vacuum, and the vacuum limit of the selected liquid ring vacuum pump system is at least 2mmhg, preferably 1mmhg. In general, the vacuum limit of the pump is greater than that of the vacuum equipment. The vacuum is 1 / 2 to 1 order of magnitude.
9. Price, operation and maintenance cost of liquid ring vacuum pump system.
About the selection of liquid ring vacuum pump system, I’ll introduce these for you. If you want to know more about vacuum pump, its price and common sense of using vacuum pump, please pay attention to our website.https://www.evpvacuum.com