How to Make the Most Efficient Rotary Pumps?

How to Make the Most Efficient Rotary Pumps?

Rotary pumps usually have many applications in industry due to their ability to work for a long time in industrial and difficult conditions. So rotary pumps maintenance is very important. Almost all vacuum coating systems made by Vac Coat Ltd. are equipped with two-stage rotary pumps. In models such as DST3, DST1, DCT, etc., which use turbomolecular pumps to create a high vacuum environment, these pumps are usually used as backing pumps. 

Rotary Vacuum Pumps

Rotary Vacuum Pumps are in the group of displacement pumps and are of the positive displacement type. This means that for each pump cycle, a constant volume of fluid is displaced, regardless of the pump pressure resistance. As a result, any blockage in the system can damage the pump and cause cracks in the system.

Rotary pumps consist of a cylindrical chamber with an inlet on one side and a discharge outlet on the other. In these pumps, the rotor (smaller in diameter than the cylindrical chamber) is placed so that it is located above the center line of the cylindrical chamber so that the minimum distance between the rotor and the chamber is at the top and the maximum distance is at the bottom. The rotor caries vanes that move in and out as the rotor rotates and slip in the rotor slot. These vanes are usually in contact with the chamber wall by centrifugal force or spring. In order to complete the contact surfaces, a controlled amount of oil is pumped into the cylindrical chamber.

Rotary Pumps Maintenance

If these pumps properly maintained and used, can last many years. Unfortunately most users are not familiar with the correct way to use and maintain pumps. In general, 5 practical recommendations regarding these pumps can be said:

  • Don’t Restrict the Exhaust Line
  • Keep the Pump Cool
  • Use Quality Filters
  • Use the Gas Ballast
  • Eliminate Oil Mist

By following the 5 tips above, you can use these vacuum pumps for a longer period of time. For more information, refer to the following link:

2 thoughts on “How to Make the Most Efficient Rotary Pumps?

    • Vac Coat

      Good Evening. Fomblin-Y LVAC Grades 06/6, 14/6, and 25/6 oils are proper choices as sealing and lubricant fluids for rotary pumps. These grades are characterized by excellent thermal stability, good viscosity index, good low-temperature properties and low evaporative losses.

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