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Vacuum Pumps for Production Equipment of Selection and Purchase

Over the years, automotive technology has made remarkable progress in the final product and the process used to develop vehicles. Today, the technology continues to evolve to meet the changing needs of consumers.

Consumers will no longer buy the same car their father used years ago, because functions and performance are constantly changing and evolving. This is also true when designating and purchasing vacuum pumps for production equipment.

Modern automobiles travel faster, provide a high level of safety, and provide multimedia services and temperature control comfort and convenience. However, vehicles are not the only commodities that change over time.

In the past decades or so, products and technologies developed for industrial vacuum pumping have undergone similar changes, but due to the lack of user awareness, traditional vacuum pumping systems are still in use. This system requires high maintenance and poor performance. A typical example is that dry vacuum pumps have excellent performance compared with piston or oil-sealed rotary vane vacuum pumps.

Dry vacuum pump

Dry vacuum pump does not use oil seal fluid. If the oil is removed from the sweep volume, the user can solve the maintenance and performance problems related to the oil. In other words, anything entering the vacuum pump inlet will pass through the pump, and the pump is compressed and then discharged at the pump exhaust.

However, the gear box of the dry pump still contains oil to ensure proper lubrication of the bearing. The oil has completely different maintenance characteristics from the pump oil, so it needs a seal to separate it from the pump chamber.

In the context of automotive analogy, vacuum pump oil is more like engine oil, where filters and oil are replaced regularly (about every 5,000 miles). However, gearbox oil changes much less frequently (every 40,000 miles) than gearbox oil.

A mechanical supercharger or "ROOTS" pump used as part of a vacuum system is a dry pump with a dry sweep, a motor or V-belt drive, and a gearbox lubricated separately by seals.

In principle, the mechanical supercharger is a dry pump, which operates under different pressure loads using different pumping methods. Compared with oil-sealed vacuum pumps, maintenance personnel will be able to explain the maintenance or maintenance of mechanical boosters.

Vacuum Pumps for Production Equipment of Selection and Purchase

Why should I consider using a dry vacuum pump?


Although the total cost of dry pumps is relatively lower than that of oil-lubricated pumps, other non-economic reasons should be considered when selecting pumps. These reasons include reducing vibration and noise, reducing the area occupied by pumping equipment and preventing waste oil discharge.

Financial costs do not come entirely from the original purchase price, but mainly from improving production efficiency and cost of ownership. These aspects are unique to individual users, their processes, installation and maintenance methods.

In other words, if the process and related maintenance are more complex, the economic benefits of dry pumps will be more noticeable. Following is an overview of standard components covering total cost of ownership and the most common application areas where dry pumping has a significant impact.


Purchase price

Generally speaking, the purchase price of dry pumps is higher than that of oil sealed pumps, but in the past few years, the preferential price of dry pumps has dropped dramatically.

Maintenance cost

For dry pumps, about 3 litres of gearbox oil must be changed every year, while for oil seal pumps, larger capacity oil should be replaced regularly. Standard 300 CFM piston pump requires 50 litres of oil per change. This process takes two to four times a year, and other consumable components need to be replaced. Let's consider the impact on total cost:


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