Using diffusion pump oil in a mechanical pump

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chucrut
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Using diffusion pump oil in a mechanical pump

Post by chucrut » Tue Dec 31, 2019 5:29 pm

Hello,
I'm using a cheap oil for my mechanical pump and I have heavy outgassing and contamination from the pump.
In my country is difficult to get a decent quality oil for mechanical pump.
Do you think is a good idea to use diffusion pump oil in a mechanical pump?
Many thanks!

Agustin Cruz
Last edited by chucrut on Tue Dec 31, 2019 6:08 pm, edited 1 time in total.

John Futter
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Re: Using diffusion pump oil in a mechanical pump

Post by John Futter » Tue Dec 31, 2019 5:42 pm

CHUCRUT
How about following the rules
you have to use your real name as your persona on this site and your first post should have been the please introduce yourself subforum
This question shou;ld have been asked in the "New user Chat Area" subforum

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Paul_Schatzkin
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Re: Using diffusion pump oil in a mechanical pump

Post by Paul_Schatzkin » Tue Dec 31, 2019 6:20 pm

John Futter wrote:
Tue Dec 31, 2019 5:42 pm

How about following the rules
<*sigh*>

--PS
Paul Schatzkin, aka "The Perfesser" – Founder and Host of Fusor.net
Author of The Boy Who Invented Television - http://farnovision.com/book.html
"Fusion is not 20 years in the future; it is 50 years in the past and we missed it."

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Richard Hull
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Re: Using diffusion pump oil in a mechanical pump

Post by Richard Hull » Tue Dec 31, 2019 6:24 pm

Diffusion pump oil is about 30 times more expensive than good proper mechanical pump oil. Do you own a gallon of diffusion pump oil?

Richard Hull
Progress may have been a good thing once, but it just went on too long. - Yogi Berra
Fusion is the energy of the future....and it always will be
Retired now...Doing only what I want and not what I should...every day is a saturday.

chucrut
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Re: Using diffusion pump oil in a mechanical pump

Post by chucrut » Tue Dec 31, 2019 6:38 pm

Hi Richard,
I have diffusion pump oil here at hand. Is expensive, but is already here so I can try.
Do you think using this oil could help outgassing and contamination from mechanical pump?

Many thanks,
Agustin Cruz

Roberto Ferrari
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Re: Using diffusion pump oil in a mechanical pump

Post by Roberto Ferrari » Tue Dec 31, 2019 7:45 pm

Agustin
Why do you start your long pursuit trying to use a wrong road?
Mechanical pump oil has several properties, not only oriented to get a good vacuum but also to protect the steel parts inside the pump.
Were are you based? Surely some provider of consumables for vacuum systems, as mass spectrometers, can sell you some quantity. Check someone in the University.
Sell or trade your diff oil!

chucrut
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Real name: Agustin Cruz

Re: Using diffusion pump oil in a mechanical pump

Post by chucrut » Wed Jan 01, 2020 2:02 am

Hi,
I will try to use a filter between the mechanical pump and diffusion pump to reduce oil contamination.
There are different types of filters for mechanical pumps. Copper wool, zeolite filter, fiberglass filter, etc.
I need to evaluate which one is easier to make here. DIY approach


Many thanks!
Agustin Cruz

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