NEWS & BLOG
Points to Consider When Selecting a Vacuum Pump
Category: Technical Support
Time: 2021-01-18
Summary: The working pressure of a vacuum pump should meet both the ultimate vacuum and the operating pressure requirements of the vacuum equipment. Generally, the vacuum level of the selected pump should be half to one order of magnitude higher than the vacuum level required by the vacuum equipment. Each type of pump has a specific operating pressure range. Therefore, the pump’s operating point should be chosen within this range and must not be allowed to operate for extended periods outside the permissible working pressure limits. Whenever possible, the vacuum pump should be operated within its high-efficiency zone—specifically, in the region corresponding to the critical vacuum or critical exhaust pressure. Operation near the maximum vacuum or maximum exhaust pressure should be avoided. Operating in these regions not only results in extremely low efficiency but also leads to unstable operation, making the pump prone to vibration and noise. For vacuum pumps with higher vacuum levels, operating within this region often triggers cavitation—a phenomenon clearly indicated by noise and vibration inside the pump. Cavitation can cause damage to components such as the pump body and impeller, ultimately rendering the pump inoperable. Select a vacuum pump that is appropriately matched to the gas flow rate and desired vacuum level. The pump must be capable of achieving the vacuum level required for production and able to evacuate all gases generated during the vacuum equipment’s process at its operating pressure. When selecting a vacuum pump, it is essential to know the composition of the gas being pumped—whether it contains condensable vapors, particulate dust, or corrosive substances. Choose a pump that is specifically suited to the gas being handled. If the gas contains vapors, particles, or corrosive components, consider installing auxiliary equipment, such as condensers or dust collectors, on the pump’s inlet pipeline. Additionally, take into account the cost of the vacuum pump itself, as well as its operating and maintenance expenses. Where permitted by usage conditions, prioritize selecting a vacuum pump that offers excellent performance at an affordable price.
The working pressure of the vacuum pump should meet both the ultimate vacuum and the operating pressure requirements of the vacuum equipment. Generally, the vacuum level of the selected pump should be half to one order of magnitude higher than the vacuum level required by the vacuum equipment.
Each type of pump has a specific operating pressure range. Therefore, the pump’s operating point should be selected within this range and must not be allowed to operate for extended periods beyond the permissible working pressure. Whenever possible, vacuum pumps should be operated within their high-efficiency zone—that is, within the region corresponding to the critical vacuum level or the critical exhaust pressure.
Operation near the maximum vacuum level or maximum exhaust pressure should be avoided. Operating within this range not only results in extremely low efficiency but also leads to unstable performance, making the pump prone to vibration and noise. For vacuum pumps with higher vacuum levels, operating within this region often triggers cavitation—a phenomenon clearly indicated by noise and vibration inside the pump. Cavitation can cause damage to components such as the pump casing and impeller, ultimately rendering the pump inoperable.
Select a vacuum pump that is suitable based on the gas flow rate and vacuum level. The pump must be able to maintain the vacuum level required for production or to exhaust all the gases generated during the process in the vacuum equipment at its operating pressure.
When selecting a vacuum pump, it’s essential to know the gas composition—specifically, whether the gas contains condensable vapors, particulate dust, or corrosive substances. Choose a pump that is appropriate for the gas being pumped. If the gas contains vapors, particles, or corrosive gases, you should consider installing auxiliary equipment, such as condensers or dust collectors, on the pump’s inlet pipeline. Also, take into account the vacuum pump’s price, operating costs, and maintenance expenses. Provided that usage conditions permit, you should, whenever possible, opt for a vacuum pump that offers excellent value for money.