Dear John,
Thanks for the information.
It is good device, but it still require a high pressure Helium gas cylinder.
Pressuring Liquid Helium container by a bag using its own low pressure gas
with addition of external heat
doesn't require
any additional high pressure cylinder and eventually eliminating issue of
adding the impurities to Liquid Helium container.
That's I feel is big advantage.
Cheers,
Manoj
On 11-Oct-2014 12:34 AM, "Jon Webb" <jon_at_mrr.com> wrote:
> Hi Manoj,
>
>
>
> Hi Jerry,
>
>
>
> I hope all is well these days. MR Resources does have a kit on our web
> site for pressurizing LHe dewars via a compressed gas helium tank. Comes
> with all the necessary fittings, tube, regulator and gauge. I strongly
> recommend this over the bag method. If you would like to pass this along to
> some of your colleagues, they may appreciate it.
>
>
>
> Thanks much.
>
>
>
>
>
> Best regards,
>
>
>
> Jon
>
>
>
> www.mrr.com
>
>
>
> MR Resources, Inc.
>
> The Leader in NMR Systems, Services and Accessories
>
> 160 Authority Drive
>
> Fitchburg, MA 01420
>
> 978-345-9011
>
> 1-888-4-NMR-HELP
>
>
> ------------------------------
>
> *From:* Manoj Naik [mailto:manonaik_at_gmail.com]
> *Sent:* Wednesday, October 08, 2014 2:59 AM
> *To:* Matthias Findeisen; AMMRL_at_ammrl.org
> *Subject:* Re: AMMRL: Helium Gas Specification for Refilling Purpose
>
>
>
> Dear Mathias,
>
>
>
> Please check the link below for images & video clip of a device to
> pressurize the Helium container. It require to paddle up (please see the
> video clip) several time to build the pressure in a Helium container, which
> may be not that convenient as that of Helium gas cylinder, but it make
> Helium gas cylinder redundent. Free of impurity concern & saving a
> inventory of Helium gas cynlider.
>
>
>
>
> https://plus.google.com/photos/107209094718337103609/albums/6067329649340496785?cfem=1&authkey=CMq-yMyEiomCngE
>
>
>
> Hope that this could be a usefull device in NMR lab.
>
>
>
> Cheers,
>
> Manoj
>
>
>
>
>
> On Fri, Oct 3, 2014 at 12:10 AM, Manoj Naik <manonaik_at_gmail.com> wrote:
>
> Dear Mathias,
>
>
>
> Helium gas 99.996 is perfectly fine for pressuring Liquid He
> container.
>
> We had used same grade for more than 10 years.
>
>
>
> But since last year we have devised another mechanism to pressurize the
> container.
>
> We are using Hot water bag(available with chemist shop) with adaptor and
> Silicon tube to connect it
>
> at the Vent port (where you connect Helium Gas) of Helium container. This
> bag is sandwich in
>
> wooden folded planks & we paddle it to increase the container pressure.
> So no more need of Helium Gas cylinder.
>
> Unfortunately, right now I am not able to send you the images & video
> clip of our device as I am away, but
>
> surely I will share that device with AMMRL community when I will be back
> to NMR Facility.
>
>
>
> Cheers,
>
> Manoj
>
>
>
> On Thu, Oct 2, 2014 at 2:59 PM, Matthias Findeisen <
> matthias.findeisen_at_uni-leipzig.de> wrote:
>
>
> Dear all,
>
> which Helium-Gas Cylinder do you use for refilling the magnet (i.e. to
> give slight pressure onto the refill dewar)?
>
> Is the specification of 99.996 % sufficient for this?
>
> Which experiences do you have?
>
> Thanks!
>
> Yours
> Matthias Findeisen
>
> Univ- Leipzig/ Germany
>
>
>
>
>
> --
>
> *Manoj Vishnu Naik, *
>
> NMR Facility,
>
> *Tata Institute of Fundamental Research, *
>
> Homi Bhabha Road, Colaba,
> Mumbai, INDIA-400005
> Tel: +91 22 22782525
> Fax:+91 22 22804682
>
>
>
>
>
> --
>
> *Manoj Vishnu Naik, *
>
> NMR Facility,
>
> *Tata Institute of Fundamental Research, *
>
> Homi Bhabha Road, Colaba,
> Mumbai, INDIA-400005
> Tel: +91 22 22782525
> Fax:+91 22 22804682
>
> No virus found in this message.
> Checked by AVG - www.avg.com
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>
Received on Sat Oct 11 2014 - 23:35:26 MST