Does anyone have diffusion pump oil for sale?

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Discussion Overview

The discussion centers around sourcing Santovac-5 oil for a diffusion pump, including price concerns and shipping issues, as well as exploring alternative oils that may serve as substitutes. The scope includes practical application and product sourcing.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • Max is seeking 100cc of Santovac-5 oil for an old diffusion pump and is looking for affordable options that can be shipped to Ireland.
  • One participant suggests a specific vendor, vacuumoil.com, listing a price of $200 but notes uncertainty about shipping to Ireland.
  • Another participant expresses a similar concern about price and shipping, indicating they are also looking for cheaper alternatives due to budget constraints.
  • Some participants propose that if a low vacuum is not essential, there may be other oils that could be used instead of Santovac-5.
  • There is a suggestion that Dow Corning DC-704 or 705 silicone oil might be a viable and cheaper alternative, with a participant considering this option.

Areas of Agreement / Disagreement

Participants generally agree on the need for affordable options and the potential for alternative oils, but there is no consensus on the best solution or the adequacy of substitutes for the specific application.

Contextual Notes

Participants have not fully explored the performance characteristics of the suggested alternatives, and there may be limitations regarding the specific vacuum requirements of the diffusion pump.

eigenmax
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I recently bought an old diffusion pump from eBay which I'm fixing up, and need 100cc of Santovac-5 oil (polyphenyl ether) for it. Does anyone have an idea where I can get a small amount (~100cc) of it to a reasonable price? What I've found isn't either shipped to Ireland or too expensive.

Thanks,
Max.
 
Last edited by a moderator:
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Tom.G said:
Best price I've found with a Web search is at https://vacuumoil.com/product/santovac-5-vacuum-fluid/ ($200)
No Idea if they will ship to you.
Thanks. I've been searching for cheaper oil (I'm 17 and have a pretty minimum wage job), and I was wondering if anyone had some that they owned for sale. Thanks for the help though, I'll look into that!
 
That is some serious vacuum the Santovac 5 oil is good for. If you don't really need that low a vacuum there are other oils that could work. Try a Google search for Santovac 5 equivalent.
 
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Would the equivalent of Dow Corning DC-704 or 705 silicone oil provide vacuum adequate for your needs? If so, it is cheaper than Santovac 5, and shipping shouldn't be a problem.
 
I was considering using DC-704, as I can get it for a lot cheaper. I think it ought to work.
 

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