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Why dual-stage rotary vane pump is running hot?

dual-stage rotary vane pump is running

So, your dual-stage rotary vane pump is running hot, huh? It’s a common issue with these pumps, and if not addressed promptly, it could lead to some serious problems. Here are some reasons why this might be happening:

  • The fan might have fewer blades than needed, or it could be spinning too slow, resulting in low air pressure and volume.
  • The motor current or power might be too high.
  • Dust might have entered the device, contaminating the pump oil and reducing its cooling capability. This, along with a clogged vacuum pump exhaust filter, can cause the temperature to rise.
  • Low voltage could be causing high current.

Now, some of these factors can’t be changed easily. For instance, the motor power and speed are usually matched to the device, and the motor speed determines the fan speed, which can’t be changed. You could add more blades to the fan, but that might cause imbalance and increase vibrations. So, what can you do when your pump starts running hot? Here are some solutions from BTLAS:

  1. You could extend the fan cover of the pump and install an axial flow fan with the same diameter. This fan would be powered by a separate power source, and after starting the device, you’d need to turn off the axial flow fan after half an hour to cool down the main unit and control the temperature.
  2. Regular cleaning and dust removal are essential. Make sure the motor’s cooling system isn’t blocked, the vacuum pump oil isn’t contaminated, and the vacuum pump exhaust filter isn’t clogged.
  3. Increasing the busbar voltage to around 400 volts could help.
  4. The oil used in the dual-stage rotary vane pump should have good viscosity performance and a low vapor pressure to maintain high vacuum levels. And of course, a good vacuum pump exhaust filter ensures clean emissions from your vacuum equipment.

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