Rotary vane pumps have become famous for low to medium-vacuum applications due to their durability, price-performance ratio, and endurance. The oil-sealed rotary displacement pump employs oil as a working fluid. This oil lubricates all moving components and fills the outlet valve's dead volume and the small space between the inlet and exit.
It minimizes the area of airflow between the vanes and the working chamber, facilitating more efficient heat transmission.
Taking Preventative Measures to Lengthen Service Periods 
Checking and changing a rotary vane pump's oil periodically ensures optimal functioning and safety. This may extend maintenance intervals. Check the pump's working environment (e.g., ventilation) as well.
Longevity-Boosting Benefits
The oil's age heavily influences the rotary vane pump's maintenance intervals. Too high an oil temperature causes the oil to age prematurely, reducing its lubricating and sealing abilities in the pump. This situation calls for maintenance, or sometimes a different type of oil. You can also get a pump thermally adjusted with an efficient system to lower oil temperature and lengthen maintenance intervals. However, the temperature can't be too low or the pump will condense.
A Closed Oil Circuit Guarantees Proper Oil Level
The pump's oil level is another factor that might lead to the need for repairs to be made prematurely. Oil leaks out of the pump as gasses are continuously pumped in at varying intake pressures. Inadequate lubrication will occur from using too little working fluid. The worst-case scenario is that the pump fails. If it happens, there will be downtime because of the high cost of repairs. It is recommended that an oil mist filter be used in conjunction with an oil return system in some situations, to mitigate this danger.
First, the oil mist filter prevents oil mist from polluting either the pump chamber within the analytical equipment or the surrounding air. Returning oil from the oil mist filter to the pump extends maintenance intervals, though. Pump reliability is ensured by an integrated oil return system that constantly replenishes the pump with lubricating and sealing working fluid. That, however, is contingent upon the oil not being beyond its use-by date and free of aggressive process gas contamination.
Some pumps have an oil return system connection pre-installed, such as the Pfeiffer Duo Line.
With pumping speeds ranging from 1.25 m3/h to 300 m3/h, the Duo Line is suitable for several applications. The pumps are hermetically sealed and function effectively due to their magnetic connection. They have a single-phase motor and an integrated safety and gas ballast valve.
The availability of different motor voltages broadens the range of applications. The pumps are highly suited for system integration due to their small form and optimum cooling. Duo pumps are just one option. A-VAC can help you choose from a wide variety of brands for your specific needs.
Get reliable performance and longer life from your Vacuum Pump with A-VAC. Whether you need new equipment or repair service, we have you covered. We offer a large variety of vacuum pumps and brands, both new and rebuilt. You can rely on A-VAC to assist you in selecting the right vacuum solution for your requirements. Contact us for more details!