How to Choose Vacuum Pump?

A vacuum pump is a device or equipment that uses mechanical, physical, chemical or physical chemical methods to pump the pumped container to obtain a vacuum. In layman's terms, a vacuum pump is a device that improves, generates and maintains vacuum in an enclosed space by various methods. How to choose the right vacuum pump? This article will list nine aspects for your reference.

1. Whether the vibration generated by the vacuum pump working has any effect on the process and environment. If the process does not allow, choose a vibration-free pump or take anti-vibration measures.
2. To know the composition of the pumped gas, whether the gas contains coagulable vapor, whether there are particles of dust, whether there is corrosive, etc. When choosing a vacuum pump, you need to know the composition of the gas and choose the corresponding pump for the pumped gas. If the gas contains vapor, particles and corrosive gas, you should consider installing auxiliary equipment, such as condenser, dust collector, etc., on the inlet pipeline of the pump.
3. The vacuum pump should be able to discharge the whole amount of gas produced in the process of vacuum equipment under its working pressure.
4. Combine vacuum pumps correctly. Since vacuum pumps have selective pumping, sometimes one kind of pump can not meet the pumping requirements, and several pumps need to be combined to complement each other to meet the pumping requirements. For example, titanium sublimation pump has high pumping speed for hydrogen, but can not pump helium, while the three-pole sputtering ion pump, (or two-pole asymmetric cathode sputtering ion pump) has a certain pumping speed for argon, the combination of the two will make the vacuum device to get a better vacuum degree. In addition, some vacuum pumps can't work under atmospheric pressure, and need pre-vacuum; some vacuum pumps have an outlet pressure lower than atmospheric pressure and need a pre-stage pump, so they all need to be used in combination with the pump.
5. The requirement of oil pollution for vacuum equipment. If the equipment strictly requires no oil, you should choose various oil-free pumps, such as: water ring pump, molecular sieve adsorption pump, sputtering ion pump, low-temperature pump, etc. If the requirement is not strict, you can choose oil pump, plus some anti-oil pollution measures, such as adding cold trap, baffle, oil blocking trap, etc., which can also reach the clean vacuum requirement.
6. Choose the working point of vacuum pump correctly. Each pump has a certain working pressure range, for example, ATO 1/2 HP 6 CFM vacuum pump working pressure range is 760mmHg~25mmHg (absolute pressure), in such wide pressure range, pumping speed changes with pressure (refer to pump performance curve for details), its stable working pressure range is 760~60mmHg. Therefore, the working place of pump should be chosen in this range. Therefore, the working place of the pump should be chosen in this range, and it should not work under 25~30mmHg for a long time.
7. How does the oil vapor from the vacuum pump affect the environment. If the environment doesn't allow pollution, you can choose oil-free vacuum pump, or put the oil vapor to outdoor.
8. The working pressure of the vacuum pump should meet the ultimate vacuum and working pressure requirements of the vacuum equipment. For example, if ATO 1 HP 10 CFM vacuum pump process requires 10mmHg working vacuum, the ultimate vacuum of the selected vacuum pump should be at least 2mmHg, and it is better to reach 1mmHg. Usually the ultimate vacuum of the selected pump should be half to one order of magnitude higher than the working vacuum of the vacuum equipment.
9. The price, operation and maintenance cost of the vacuum pump.

This is all about how to select vacuum pump, and if you still want to consult more information about ATO vacuum pump, welcome to leave a message in the comment section.