Does anyone know where to get a proper adapter for the large Harvest Right freeze drier to add a kf25 connection to the machine?
Just the regular large, not pharmaceutical.
I tried ordering a 3/4 FNPT to KF25 flange fitting from Amazon, but the threads are not the same.
The goal is to add my mechanical cold trap and maybe use a stronger pump for freeze drying.
3 Likes
9 posts were split to a new topic: Off topic nonsense
The fitting on the hr is 3/4 jic so you need 3/4 jic to npt and then 3/4 npt to kf-25. Can’t remember where I sourced them but I remember it took some looking.
9 Likes
Thanks!
1 Like
Jic is pretty annoying. I’m sure most people here know this already but
PSA: I searched for a specific gasket for a Hitachi centrifuge for about a half month until I found out Japanese Industrial Code exists (as opposed to metric or amurica). Then I found it immediately. Very frustrating.
5 Likes
I searched Google the other way around [kf25 to 3/4npt] and got this
Looks like what you’re looking for
2 Likes
1 Like
Last one
55$ from this one
1 Like
The back of the dryer is 3/4” jic not npt. You will still need an adapter from jic female to male npt
Out of curiosity, what is on the other side of that panel? I’m willing to bet there’s something with regular ass pipe threads inside there somewhere
3 Likes
It looks to be 3/4 mjic connector on the back of the freeze dryer
So far, no luck with finding a female jic to male npt.
But I did find a 3/4 male jic to 3/4 male npt. Thinking I can just use the hose the machine came with and add the male jic to female hose end at cold trap. Then use the 3/4 npt to KF25 adapter that I originally bought to connect trap.
1 Like
GroovyOctopus, I tried that originally, but turns out the threads are 37° jic and not NPT…
On the outside yes but is that welded directly to the chamber?
This part I bet isn’t JIC on the other side:
On that note, if OP has access to a half decent welder, welding a KF ferrule on the end of that JIC is for sure the cheapest way to do that, nothing sucks like spending $150 on adapters and adding three joints when the goal could be accomplished with a $10 ferrule
1 Like
Why pay a welder when the adapter I posted and the first eBay link posted are less than $22 together and accomplish exactly what the origanal poster wanted?
3 Likes
Well for starters the adapter you linked was 3/8 JIC not 3/4, it’s also carbon steel rather than stainless, and because eliminating threaded connections is always a win in my book. I agree, if you’ve got to pay someone $100 to do it, it’s not a good solution hence the disclaimer:
2 Likes
I did see a few different places with swivel nut style adapters that looked like they would work. But, I’m was unsure if the swivel would work under vacuum without potentially leaking. So I was looking for something rigid and one piece. I’m not familiar with swivel nut adapters, just made the assumption. Need to get my hands one one to know for sure. The downside of looking shit up online…
The swivel really shouldn’t be an issue at all, the seal is still flare to flare
2 Likes
That is 3/4 jic
I used a swivel for the 3/4 jic to 3/4 female npt. eaton brand I think I got it locally at fastenal, no problems with vacuum. I think I paid ~$30 for the two adapters
6 Likes