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Background

I have a beginner question concerning rotary vane vacuum pumps like this one: VIVOHOME 110V 1/3 HP 4CFM Single Stage Rotary Vane Air Vacuum Pump

Here are the pump specifications:

  • Voltage: 110V
  • Free Air Displacement: 4CFM
  • Ultimate Vacuum: 5 Pa
  • Intake Fitting: 1/4 &1/2 Flare
  • Oil Capacity: 350ml

The intended commercial use of this particular pump is for HVAC systems, although I'm not totally sure what the vacuum pump accomplishes in that scenario.

Question

I want to use a pump like this to hold a vacuum in a sealed chamber. Is this possible? Or is a rotary vane pump used exclusively to move fluid/gas?

In particular, I want to build a home cathode ray tube. A vacuum is required so that the electrons don't bump into air molecules as they travel down the tube. I'm not sure if 5 Pa is strong enough vacuum for this application, but the pump is so cost effective that I wanted to look into its operation.

nwsteg
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1 Answers1

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I have the same pump and I use it to hold (no flow) vacuum without any problems (my use case is to hold vacuum while in epoxy mixture so that all bubbles can be extracted before pouring it into the mold, which usually takes 30min). But don't expect to get 5 Pa from this pump, I'd say 50 Pa is more realistic.

cactusresistance
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