WANTED OIL DIFF PUMP/TURBO PUMP

Use this forum to offer / scavenge for fusor parts
Post Reply
Adam Binns
Posts: 12
Joined: Wed Nov 01, 2017 11:38 pm
Real name: Adam Binns
Contact:

WANTED OIL DIFF PUMP/TURBO PUMP

Post by Adam Binns » Wed Nov 22, 2017 3:01 am

good afternoon
I am in the market for a diffusion pump or turbo pump that has a 2.75-inch conflat flange and uses 240 volts or similar (220 or 250 should still work on 240 volts) it would also be helpful if it came with a butterfly valve or another kind of valve for throttling
"it's not illegal just don't get caught"

ian_krase
Posts: 346
Joined: Mon Nov 28, 2016 7:48 am
Real name: Ian Krase

Re: WANTED OIL DIFF PUMP/TURBO PUMP

Post by ian_krase » Wed Nov 22, 2017 4:58 am

In this world, you will almost always need adapters. In particular, diffpumps almost always have oddball flanges which will usually require custom adaptors to be fabricated or scrounged. Small turbos are usually standard but sometimes weird as well.

2.75 Conflat has a typical max ID of 1.75 inches. Very few turbo pumps are this small in diameter (though occasionally one does find a necked-down special one meant for small sized applications like mass specs.

I think that the most common flange for small turbo pumps is 63mm ISO-LF (that refers to inside diameter. Slightly less common is 4.5 Conflat. Fortunately it is fairly easy to make or buy an adaptor between this and 2.75 CF.


In general, one finds the (working, complete) pump, then one finds the fittings one needs. Unless you are ready to spend several thousand dollars on a factory rebuilt pump.

Andrew Seltzman
Posts: 674
Joined: Mon Feb 02, 2004 1:02 am
Real name: Andrew Seltzman
Contact:

Re: WANTED OIL DIFF PUMP/TURBO PUMP

Post by Andrew Seltzman » Wed Nov 22, 2017 5:28 am

Turbo/drag hybrid $600 with controller, free shipping and right of return if inoperative:
https://www.ebay.com/itm/Pfeiffer-Split ... 1438.l2649
Andrew Seltzman
www.rtftechnologies.org

ian_krase
Posts: 346
Joined: Mon Nov 28, 2016 7:48 am
Real name: Ian Krase

Re: WANTED OIL DIFF PUMP/TURBO PUMP

Post by ian_krase » Wed Nov 22, 2017 5:40 am

Huh. Lots of goodies besides, as well.

(Mostly when I looked at "splitflow" I would find these bizzare turbo-pump-half-chambers. Very strange.)


Finding a turbo with a working controller all together is rare enough.

Adam Binns
Posts: 12
Joined: Wed Nov 01, 2017 11:38 pm
Real name: Adam Binns
Contact:

Re: WANTED OIL DIFF PUMP/TURBO PUMP

Post by Adam Binns » Wed Nov 22, 2017 11:49 am

Thanks for the replys
Andrew I would love to buy that pump but it is sadly out of my price range as I am looking for a pump in the 250 dollar range. Although if anyone has a pump with a different sized flange I would still love to buy it as I could make an adapter.
"it's not illegal just don't get caught"

Andrew Seltzman
Posts: 674
Joined: Mon Feb 02, 2004 1:02 am
Real name: Andrew Seltzman
Contact:

Re: WANTED OIL DIFF PUMP/TURBO PUMP

Post by Andrew Seltzman » Wed Nov 22, 2017 5:30 pm

Try making them an offer, they might take it.
Andrew Seltzman
www.rtftechnologies.org

ian_krase
Posts: 346
Joined: Mon Nov 28, 2016 7:48 am
Real name: Ian Krase

Re: WANTED OIL DIFF PUMP/TURBO PUMP

Post by ian_krase » Wed Nov 22, 2017 8:41 pm

Yeah, vacuum pump type stuff being sold on ebay, if it doesn't say it's been *actually* tested, will often accept lowball offers. It costs nothing to ask.

At 250 dollars I doubt you would find anything other than a diffpump, with an oddball flange, probably water cooled, maybe filthy, and possibly an inconveniently large one. Make sure it has the jet stack.




https://www.ebay.com/itm/ONE-1-diffusio ... SwBahVCfT8

https://www.ebay.com/itm/Edwards-Diffst ... SwgkxZzS9D

https://www.ebay.com/itm/Vactronic-diff ... SwyttZ3X3W

Adam Binns
Posts: 12
Joined: Wed Nov 01, 2017 11:38 pm
Real name: Adam Binns
Contact:

Re: WANTED OIL DIFF PUMP/TURBO PUMP

Post by Adam Binns » Thu Nov 23, 2017 2:51 am

might make an offer for the second link as it looks like it's in good condition and I can probably get a custom made adapter for it to get it to a 2.75 inch OD.
although how much do you think I should offer as the shipping is a lot of money to Australia(90 dollars!)
"it's not illegal just don't get caught"

Andrew Seltzman
Posts: 674
Joined: Mon Feb 02, 2004 1:02 am
Real name: Andrew Seltzman
Contact:

Re: WANTED OIL DIFF PUMP/TURBO PUMP

Post by Andrew Seltzman » Thu Nov 23, 2017 4:18 am

Make an offer by message to the seller of the turbo first, they may be willing to come down in price.
Andrew Seltzman
www.rtftechnologies.org

Post Reply