Author Topic: Name for this vacuum fitting?  (Read 1372 times)

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Offline Photon939

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Name for this vacuum fitting?
« on: May 08, 2017, 05:39:53 pm »
I bought an MVE Cryoshipper dewar on ebay a while back without realizing it had a fiberglass neck. It currently has little insulation value as it seems to have lost its vacuum. I do not know the name of the vacuum port on the side for re-pumping and haven't found any useful information online besides a crappy diagram, let alone a place where I can buy an adapter for a reasonable price.

Any info would be helpful. Also I don't have any high vacuum stuff, just a cheapo harbor freight single stage HVAC vacuum pump that claims it can pump down to 75 microns best case scenario. Hopefully that would be a good enough vacuum to hold LN2 again.

 

Offline ovnr

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Re: Name for this vacuum fitting?
« Reply #1 on: May 08, 2017, 05:53:37 pm »
I like how you couldn't be bothered to move the handle out of the way so we could actually see the fitting.
 

Offline Photon939

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Re: Name for this vacuum fitting?
« Reply #2 on: May 08, 2017, 06:46:38 pm »
I will take a better photo asap, do not currently have access to it. That was the only picture I had in my dropbox that showed the fitting at all.
 

Offline LaserSteve

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Re: Name for this vacuum fitting?
« Reply #3 on: May 08, 2017, 09:53:47 pm »
The tool your looking for is a "valve actuator or vacuum valve actuator" and the Googling is left as an exercise for the student.

Cpc-cryolab comes to mind as an example.

S.
« Last Edit: May 08, 2017, 09:56:41 pm by LaserSteve »
"I've Never Heard of a Nuclear Meltdown Caused by a Buffer Overflow"  filssavi
 

Offline Photon939

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Re: Name for this vacuum fitting?
« Reply #4 on: May 13, 2017, 05:05:34 pm »
Here is a better photo for those that may come across this thread in the future

Thanks for the suggestion Steve - using that term I have found two of the valves but there is no way I am paying $400+ for this valve. Unless I can find a substantially cheaper option it seems this dewar will be useless.

Perhaps I could drill a hole in the side and braze in a standard HVAC access port.
« Last Edit: May 13, 2017, 05:08:24 pm by Photon939 »
 


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