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.
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.