Has anyone purchased from Trillium US Inc on Ebay?

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Alen Zhang
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Joined: Sat Jan 13, 2024 9:46 am
Real name: Alen Zhang

Has anyone purchased from Trillium US Inc on Ebay?

Post by Alen Zhang »

I have been searching a fairly long time for an adapting connection piece between my diffusion pump (ISO100b outlet flange) and my bellow flange (2.75 conflat) because of how uncommon the ISO100b flange appears to be.

A couple months ago, I finally found a few suitable pieces being sold by Trillium US Inc on Ebay. I purchased this: https://www.ebay.com/itm/350588141907. However, they still have not shipped the item despite it having been a few months, and the seller has not responded to my messages for a few business days.

Should I request a refund, or has anyone successfully purchased something from this vendor?
Alexander Ziemecki
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Joined: Mon Aug 21, 2023 6:25 pm
Real name: Alexander Ziemecki

Re: Has anyone purchased from Trillium US Inc on Ebay?

Post by Alexander Ziemecki »

Yes, definitely do that. It's possible that company is just one guy and he forgot about it, but I've also encountered a lot of scammers.
It's been months - you deserve your money back.
It's possible also that the seller on ebay is not actually Trillium.

What pump did you buy? I may have gotten a similar one. I ended up buying two flanges and a reducer, and getting them welded together to form an adapter. This ended up being kind of expensive (a little bit more than that connector you posted), but not a ton of options out there otherwise. If you're going to go the same route, let me know and I'll tell you some things to look out for in hiring a welder & describing the job to them correctly - it's a special kind of job.

What gasket/seal were you planning on using with that connector?
Alen Zhang
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Joined: Sat Jan 13, 2024 9:46 am
Real name: Alen Zhang

Re: Has anyone purchased from Trillium US Inc on Ebay?

Post by Alen Zhang »

Huge thanks for your reply.
I will be requesting a refund. I have the Edwards Vacuum SI-100 Diffusion Pump 90V #8 (manual: https://mullinscyclotron.weebly.com/upl ... manual.pdf). I do not have easy access to any welding equipment on my own. On the kf side of the connector, I was planning to use a simple kf connection oring and clamp, and on the iso side, I was planning on using the iso100 oring that came with the pump and 4 nuts and bolts.
Alexander Ziemecki
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Joined: Mon Aug 21, 2023 6:25 pm
Real name: Alexander Ziemecki

Re: Has anyone purchased from Trillium US Inc on Ebay?

Post by Alexander Ziemecki »

I think you might need a different adapter to connect the diff pump to the bellows valve. Both sides of this adapter are ISO. You need one that has one side ISO, and the other side CF, like this:

https://www.idealvac.com/en-us/Adapter- ... pp/P101739
https://www.mackvacuum.com/index.php/ad ... nge-304-ss

(these are the wrong size - the CF needs to be 2.75, like you said)
I think it's ok if it's not strictly ISO 100b, as long as it's still ISO 100.

KF connection sounds good though. General advice for the o-rings, that i'm passing on: Keep the o-ring out of direct sunlight, or high/low temps.. Check the shape of the ring too - some are D-shaped, like a tokamak, and some are O-shaped, like a toroid. If it's D-shaped, then it matters which orientation you insert it in. When inserting, make sure it doesn't bunch or pinch anywhere. Make sure the groove is free of little specs and bits of debris, and that the ring is clean too. Don't clean it with anything harsh like acetone or the rubber will dissolve.
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Rich Gorski
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Re: Has anyone purchased from Trillium US Inc on Ebay?

Post by Rich Gorski »

Alen,
As Alexander said there are many companies out there that sell ISO to CF nipples. Here’s another one:
My guess is that you will need the single claw style clamp on the ISO side.

ISO100 to 2.75CF conical adapter
https://www.ldsvacuumshopper.com/2odcotoiscor.html

Single claw clamp for ISO 100 blank style
https://www.ldsvacuumshopper.com/lf80and100si.html

Rich G.
Alen Zhang
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Joined: Sat Jan 13, 2024 9:46 am
Real name: Alen Zhang

Re: Has anyone purchased from Trillium US Inc on Ebay?

Post by Alen Zhang »

Much gratitude for your replies.

For clarification, are the Single claw clamps for iso enough to connect regular iso100 to iso 100b flanges together? Do the bolt side of the single claw clamps go through the bolt holes on the iso100b side? As you can see in the manual I provided, the iso100b outlet flange for the pump is a bit hard to work with due to its bulky shape.
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Rich Gorski
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Real name: Rich Gorski
Location: Illinois

Re: Has anyone purchased from Trillium US Inc on Ebay?

Post by Rich Gorski »

Yes, 4 single clamps should be enough. Since the manual indicates the pump is ISO100 compatible the single clamp should work and be of correct size. My only question is the bolt thread size on the single clamp. You might have to replace the bolt with one that has the correct thread.

Rich G.
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