[2chesapeakes]

Originally Posted by rickss69

Thanks Buckeye. Yeah, it also has some sort of pop off valve built into the bottom valve as well.

That should be a pressure relief. That type of dewar may take a while for the pressure to build to a point where you can use the valve to dispense. I had rented one similar to that and after a number of hours there was still not enough pressure built up to use the valve to extract the LN2. The dewar I have now is classified as a pressurized dewar. It is designed to build and maintain 22PSI. I can usually start dispensing immidiatly after it is filled. As for dispensing I looked at the hoses they sell to dispense then went to a hardware store and purchased a flexible 1/2" gas line and it fit perfectly to the valve.

[rickss69]

I will let AirGas look at it. They can probably tell or test what relief pressure is for the container.

[Buckeye]

Originally Posted by 2chesapeakes

That should be a pressure relief. That type of dewar may take a while for the pressure to build to a point where you can use the valve to dispense. I had rented one similar to that and after a number of hours there was still not enough pressure built up to use the valve to extract the LN2. The dewar I have now is classified as a pressurized dewar. It is designed to build and maintain 22PSI. I can usually start dispensing immidiatly after it is filled. As for dispensing I looked at the hoses they sell to dispense then went to a hardware store and purchased a flexible 1/2" gas line and it fit perfectly to the valve.

Yeah Jeff I was talking with my friend at Airgas yesterday and he told me about the differance between the different types of Dewars, I did not know that yours was a high pressure one.

Mine is a low pressure and takes awhile to get LN2 out of it after I fill it up, ticks me off actually.