Hello David,
Thank you for sharing your first hand experience with the Z58140 one-way valve.
This particular one-way valve I showed in the photograph was in the big
magnet installation crate that was delivered ahead of the magnet
rebuilding. When I saw the "for installation only" stamped on the side
of valve, I had assumed it was just their way to ensure it didn't get
left behind by mistake when the work was done.
Now I see that there was a much more important reason that message was
stamped on the side of the valve.
Very good to know!
Cheers,
Bob.
On 2024-02-21 1:21 p.m., Vander Velde, David via groups.io wrote:
>
>
> Regarding the valve Z58140, I have some history with this ... above
> the part number, it says Nur fur installation, aka "only for
> installation." I should have taken that injunction at face value. I
> bought a couple of these figuring I could use them to connect some
> Oxford magnets to our helium recovery system, and leave them in place
> both during fills and between fills, like I did with Bruker magnets
> and Bruker check valves. However, this did not work in practice. At
> normal between-fill outflow rates, the gas flow on my flow meter would
> seesaw wildly every couple of seconds. It was not a good look. I think
> this valve is designed for popping open under much higher than normal
> flow, and staying open only when that flow and back pressure is
> sustained. Probably optimized for the conditions encountered during
> installing the magnet. So they cost me ca $800 each, but not fit for
> my intended purpose. Caveat emptor.
> ------------------------------------------------------------------------
> *From:* main_at_ammrl.groups.io <main_at_ammrl.groups.io> on behalf of Bob Berno <bberno_at_mcmaster.ca>
> *Sent:* Wednesday, February 21, 2024 10:04 AM
> *To:* main_at_ammrl.groups.io <main_at_ammrl.groups.io>
> *Subject:* Re: [AMMRL] problems with pulsecal --> One way valves for helium exhaust
> Hello Karel,
>
> I can't comment on the main topic of your email, but I wanted to answer
> your questions about the one-way valve on your helium exhaust port.
> I don't know what the fittings look like at the top of your helium
> manifold, but from the photo you provided I suspect you have some sort
> of adapter that allows you to connect a piece of Tygon (or similar)
> tubing to the check valve you showed in your photo.
> Basically, you want to replace the adapter+small check valve with
> something like the silver one-way valve shown in the attached photo.
> Fortunately, this photo also shows the Bruker part number, for your
> ordering convenience. About four years ago it cost about $365.00 CDN.
>
> This silver one-way valve is what we have on all but one of our
> magnets. However, you might not be able to attach this directly to your
> existing manifold because it may be looking for something which has a
> KF-25 type fitting. Then, you would also need a KF 25 adapter that will
> allow you to screw one-way valve into place. Off hand I don't seem to
> have the part number for that.
>
> One other option would be to get a different one-way valve which already
> had the KF-25 fittings on both ends. A few years ago when Bruker was on
> site to re-energize an old magnet, the magnet engineer installed a
> one-way valve like the one in the photo shown in this link:
> https://mcloud.mcmaster.ca/s/SM6963SwWSof4WK
> It's a little hard to see, but it looks like it has Part Number: Z58140
> I have no idea what this costs.
>
> I hope this helps.
> Bob.
>
--
Dr. Bob Berno
Manager, NMR Facility
McMaster University, ABB-156
1280 Main St. West
Hamilton, ON L8S 4M1
T: 905-525-9140 x24158 or x24686
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Received on Wed Feb 21 2024 - 11:32:07 MST