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
Received on Tue Oct 07 2014 - 20:59:00 MST