Vacuum Pump Selection

[jacklso]

Hello,

I need some guidance in selecting a vacuum pump that is to remove the air/HNO3/HF fume in a cylinder that is partially immersed in an acid bath and let atmosphere push the acid back to the cylinder.

The following are some operating conditions:

- Low vacuum
- Room temperature
- About 5 mins per operation
- Free Air Displacement ~1 CFM

Please share some technical insights such as whether this should be oil-free pump. It would be great if anyone knows of the brands of some exhaust/vacuum pumps that are compatible with HNO3 and HF fume. Thanks.

 

[EdStainless]

How much vacuum do you need? If it is only a suction then I would look at eductors. The acid fumes will eat up any metallic construction.
Start here

http://www.foxvalve.com/lt_air_ejectors.aspx

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