1. First of all, we should fully understand the composition of the exhausted gas. If the gas contains no condensable vapor, particulate dust, corrosiveness, explosion and so on; if the extracted gas is explosive, it should be equipped with explosion-proof motor, because the whole working process of the equipment is isothermal.
2. Understand the impact of the oil vapor discharged from the equipment on the environment. If the environment is not allowed to be polluted, choose oil-free equipment or discharge the oil vapor outdoors.
3. The equipment should be assembled correctly. Because each kind of equipment has selective pumping, so sometimes the selection of a pump can not meet the requirements of pumping, several pumps need to be combined to complement each other in order to meet the requirements of pumping.
4. If there are many equipments working at the same time, the circulating liquid should be cooled, otherwise the vacuum degree will be affected. The cooling device can be equipped with cooling tower, and booster pump should be equipped to pressurize the pipeline.
5. Whether the vibration caused by the working equipment has an impact on the process and environment, if the environment is not allowed, the vibration-free pump should be selected or vibration-reducing measures should be taken.
6. Under its working pressure, the equipment should be able to discharge all the gas produced in the process of vacuum equipment.
Special attention should also be paid to considering the price, operation and maintenance costs of the equipment according to the actual situation. I hope that the method of selecting and purchasing the liquid ring vacuum pump described above can really help you, apply it to practice and bring real benefits to production operations.
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