The choice of vacuum pump -- Boao Vacuum provides you with vacuum system solutions

A few things you need to know for selecting a vacuum pump

1. The working pressure of the vacuum pump should meet the limit vacuum and working pressure requirements of the vacuum equipment. For example, a certain vacuum drying process requires a working vacuum degree of 10mm Hg, and the maximum vacuum degree of the selected vacuum pump should be at least 2mm Hg, preferably up to 1mm Hg. The maximum vacuum degree of a pump is usually chosen to be half to one order of magnitude higher than the working vacuum degree of the vacuum equipment.

2. Choose the working point of the vacuum pump correctly. Each type of pump has a certain working pressure range, such as the 2BV series water ring vacuum pump, which has a working pressure range of 760mmHg~25mmHg (absolute pressure). Within this wide pressure range, the pump's pumping speed varies with pressure (refer to the pump's performance curve for detailed changes), and its stable working pressure range is 760-60mmHg. Therefore, the working point of the pump should be selected within this range, which is more suitable, and it cannot be operated for a long time at 25-30mmHg.

3. The vacuum pump should be able to discharge all the gas generated during the vacuum equipment process at its working pressure.

4. Correctly combine the vacuum pump. Due to the selective pumping of vacuum pumps, sometimes selecting one type of pump cannot meet the pumping requirements. Several pumps need to be combined and complemented to meet the pumping requirements. A titanium sublimation pump has a high pumping speed for hydrogen, but cannot pump helium, while a bipolar sputtering ion pump (or bipolar asymmetric cathode sputtering ion pump) has a certain pumping speed for argon. When combined, the vacuum device can achieve a better vacuum degree. In addition, some vacuum pumps cannot operate at atmospheric pressure and require pre vacuum; Some vacuum pumps have an outlet pressure lower than atmospheric pressure and require a front stage pump, so they need to be combined for use.

5. Requirements for oil pollution in vacuum equipment. If the equipment strictly requires oil-free operation, various oil-free pumps should be selected, such as water ring pumps, molecular sieve adsorption pumps, sputtering ion pumps, low-temperature pumps, etc. If the requirements are not strict, you can choose to have an oil pump and add some oil pollution prevention measures, such as adding a cold trap, baffle, oil blocking trap, etc., which can also meet the requirements of clean vacuum.

6. Understand the composition of the extracted gas, whether the gas contains condensable vapor, whether there is particulate dust, and whether it is corrosive. When choosing a vacuum pump, it is necessary to know the gas composition and select the corresponding pump for the extracted gas. If the gas contains steam, particles, and corrosive gases, it should be considered to install auxiliary equipment such as condensers, dust collectors, etc. on the inlet pipeline of the pump.

7. How does the oil vapor discharged from the vacuum pump affect the environment. If pollution is not allowed in the environment, you can choose an oil-free vacuum pump or discharge the oil vapor outdoors.

8. Does the vibration generated during the operation of the vacuum pump have any impact on the process and environment. If the process does not allow it, a vibration free pump should be selected or anti vibration measures should be taken.

9. The price, operation, and maintenance costs of vacuum pumps.

If you need to purchase a vacuum pump produced by our company, you can provide the following info to us:

1. Product name and model of vacuum pump

2. The vacuum degree requirement of a vacuum pump is in units of PA or MPA

3. Vacuum pump pumping speed requires units of L/S or M3/MIN

4. The use and working conditions of vacuum pumps

5. Motor power of vacuum pump (KW)

6. Speed of vacuum pump (r/min)

7. Voltage of vacuum pump [V]

8. The inlet and outlet diameter of the vacuum pump

9. Material requirements for vacuum pumps

10. Does it come with attachments

Please provide us with as detailed information as possible so that we can correctly select a vacuum pump for you.

You can contact us at any time.