Vacuum Pump Basics

[sanchem]

I need to design vacuum pump for solvent recovery. I am a beginner in this field.
How does one approach design vacuum pumps? Can someone explain the basic details of vacuum operations with reference to certain numerical calculations?
please explain the significance of terms like :

1. mAx Vacuum rating
2. Inlet temp
3. outlet temp
4. bleeding rate
5. pump system temperature

Any links to docs explaining basic calculations and operations will be really helpful.

 

[LittleInch]

You need to design one??

Why? Just buy one from someone who's been building them for a long time.

Starting at such a basic level needs a lot lot lot more than you're going to get on an internet forum....

Sorry

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

 

[sanchem]

@ LittleInch : That is always an easier option but I want to know how do I approach the basic calculations for any vacuum system. I would appreciate if anyone explains with examples or give some references.

 

[LittleInch]

Try this

https://www.pfeiffer-vacuum.com/en/know-how/vacuum-generation/rotary-vane-vacuum-pumps/application/

or this

https://www.pfeiffer-vacuum.com/en/know-how/vacuum-generation/rotary-vane-vacuum-pumps/application/

or this

https://www.festo.com/net/SupportPortal/Files/286804/Basic_Vacuum_Technology_Principles.pdf

Google is your friend, learn to cuddle up to him or her or it and read, then come back with some more specific questions.

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

 

[sanchem]

Thanks @LittleInch.

I agree that I need to be specific but the reason I asked it here is that Google is a friend but it gives so many options, here with you all experts I can get specific and precise advice.

Thanks for the link anyways.

 

[LittleInch]

I understand but to get specific and precise advise you need to ask specific and precise questions. A number of people come on and say - I read this here, but that there - which one is correct or the best practice. That is a start point.

One thing you learn about vacuum is that the time to create whatever low pressure you want is a logarithmic type curve and to get very low vacuum conditions can take weeks.

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

 

[gcastan]

an important part is to estimate the amount of gas that will be pumped out. For instance there may be decomposition which will bring the gas flowrate up.

Gabriel Castaneda, P.E.

http://www.gabcheminc.com