1. The working pressure of the vacuum pump should meet the ultimate vacuum and working pressure requirements of the vacuum equipment.For example, a vacuum drying process requires a working vacuum of 10mmHg, and the ultimate vacuum of the selected vacuum pump must be at least 2mmHg, preferably 1mmHg.Usually, the ultimate vacuum of the pump is selected to be half to an order of magnitude higher than the working vacuum of the vacuum equipment.

2. Correctly select the working point of the vacuum pump.Each pump has a certain working pressure range, such as: 2BV series water ring vacuum pump working pressure range 760mmHg~25mmHg (absolute pressure), within such a wide pressure range, the pumping speed changes with the pressure (for details, please refer to the pump Performance curve), its stable working pressure range is 760~60mmHg.Therefore, the pump's working point should be selected within this range, and it should not be allowed to work for a long time under 25~30mmHg.

3. Under its working pressure, the vacuum pump should be able to exhaust all the gas generated during the process of the vacuum equipment.

4. Combine the vacuum pump correctly.Due to the selective extraction of vacuum pumps, sometimes one type of pump cannot meet the extraction requirements, and it is necessary to combine several pumps to complement each other to meet the extraction requirements.For example, a titanium sublimation pump has a high pumping speed for hydrogen, but cannot pump helium, while a tripolar sputtering ion pump (or a two-pole asymmetric cathode sputtering ion pump) has a certain pumping speed for argon, both Combined, it will make the vacuum device get a better vacuum.In addition, some vacuum pumps cannot work under atmospheric pressure and need to be pre-vacuum; some vacuum pump outlet pressure is lower than atmospheric pressure, and a backing pump is required, so the pumps need to be combined for use.

5. The requirements of vacuum equipment for oil pollution.If the equipment is strictly required to be oil-free, various oil-free pumps should be selected, such as: water ring pumps, molecular sieve adsorption pumps, sputter ion pumps, cryogenic pumps, etc.If the requirements are not strict, you can choose to have an oil pump, plus some anti-oil pollution measures, such as cooling traps, baffles, oil traps, etc., which can also meet the clean vacuum requirements.

6. Understand the composition of the gas to be pumped. The gas contains no condensable vapor, particle dust, corrosiveness, etc.When choosing a vacuum pump, you need to know the gas composition and choose the appropriate pump for the pumped gas.If the gas contains steam, particles, and corrosive gases, you should consider installing auxiliary equipment, such as condensers, dust collectors, etc., on the inlet pipe of the pump.

7. How does the oil vapor discharged from the vacuum pump affect the environment?If the environment does not allow pollution, you can choose an oil-free vacuum pump, or exhaust the oil vapor outdoors.

8. Does the vibration generated by the vacuum pump have any impact on the process and the environment?If the process does not allow, choose a vibration-free pump or take anti-vibration measures.

9. The price, operation and maintenance costs of the vacuum pump.

If you need to buy a vacuum pump produced by our company, you can set 1. The product name and model of the vacuum pump 2. The vacuum degree requirement of the vacuum pump is in PA or MPA 3. The pumping speed of the vacuum pump is required.

求单位L/S或M3/MIN 4、真空泵的使用与否和工作条件 5、真空泵的电机功率（KW）6、真空泵的转速（r/min）7、

The voltage of the vacuum pump [V] 8, the inlet and outlet diameter of the vacuum pump 9, the material requirements of the vacuum pump 10, whether to bring accessories, etc., provide as detailed information as possible to our sales department, so that

We can choose the vacuum pump for you correctly.National free consultation telephone: 13705762556/18658679456