Vacuum pump selection considerations

1. Understand the composition of the gas to be pumped

Before selecting a vacuum pump, you first need to understand the specific composition of the gas to be pumped.If the gas contains condensable vapors, particles, or corrosive gases, it may be necessary to install auxiliary equipment, such as a condenser or dust collector, on the pump inlet pipeline to protect the performance of the pump and extend its service life.

2. Determine the working point of the vacuum pump

Each vacuum pump has a certain working pressure range.Taking the 2BV series water ring vacuum pump as an example, its working pressure range is between 760mmHg and 25mmHg.The ideal operating point should be within this range to avoid long-term operation at too low pressure.

3.Meet the ultimate vacuum and working pressure requirements of vacuum equipment

When selecting, make sure that the ultimate vacuum degree of the vacuum pump is higher than the working vacuum degree required by the vacuum equipment.Generally, the ultimate vacuum of the pump should be half to one order of magnitude higher than the operating vacuum of the equipment.

4.Consider the requirements for oil pollution

If the vacuum equipment strictly requires oil-free, oil-free pumps should be selected, such as water ring pumps, molecular sieve adsorption pumps, etc.For situations where oil pollution requirements are not strict, you can choose to have an oil pump and take corresponding measures to prevent oil pollution.

5、Environmental restrictions on emissions.

Consider the impact of oil vapor discharged from the vacuum pump on the environment.Where there are strict restrictions on environmental pollution, an oil-free vacuum pump should be used or the oil vapor should be discharged outdoors.

6. Impact of vibration

Understand the impact of vibration generated when the vacuum pump is working on the process and environment.If necessary, choose a vibration-free pump or take anti-vibration measures.

7. Economic factors

consider the price, operation and maintenance costs of the vacuum pump.These factors directly affect the cost-effectiveness of the entire project.

8. The exhaust volume requirement

ensures that the vacuum pump can effectively discharge all the gas generated during the vacuum equipment process under the working pressure.

9. Combination use of pumps

Since different vacuum pumps have different pumping characteristics, sometimes several pumps need to be used in combination to meet specific pumping requirements.Understanding the characteristics of various pumps and matching them appropriately can greatly improve the efficiency and reliability of the vacuum system.

Selecting a vacuum pump is a process that comprehensively considers a variety of factors, including the characteristics of the pumped gas, working pressure, oil pollution requirements, environmental impact, economic costs, etc.Correct selection can not only ensure process requirements, but also improve efficiency and reduce costs.