Category: Ask the Experts

I am constructing a cryogenic generator for the Air Force. It operates at 15,000 rpm for Liquid Hydrogen. I need a rotating shaft seal that will work with liquid to gaseous hydrogen. Where can I source seals for this application?

I am a graduate student at Penn State University working on a cavitation resistance project via cryo-treating a Nickel-Aluminum-Bronze impeller.

I am a metallurgical engineer looking for technical papers on the effect of processing metals at liquid helium temperatures. In anyone familiar with any work in this field?

I have a potential client who is looking for quantitative data on mechanical properties, particularly fatigue properties, with and without cryogenic tempering at -300/-320 degrees F for AISI 4340 alloy steel. Can you point me in the right direction?

Greetings from Australia. I am looking for a company that I might contact that has any experience or has done any research into cryogenic processing for medical equipment, in particular, joint prosthesis.

Where can I find a cryogenic sealant for my LNG fueled buses?

I'm on the hunt for a material/gel/epoxy that will transfer the cold temperature of a cryo-box to a test article. The cryo-box is curved and the test article is at the same curvature. I'm looking for something to put between them to make the surface of the test article as …

I'm seeking a consultant with experience in the manufacture of brazed aluminum heat exchangers for cryogenic applications. Is there anyone you could recommend to me?

We are looking for manufacturers of cryogenic dewars with infrared detectors (long wave). We need these dewars for repairing infrared systems (thermographic systems) and we cannot find such glass dewars. Do you know any manufacturers’ addresses?

Would you please suggest a few manufacturers that produce cryogenic regenerator lead spheres? The size we need is 0.15mm-0.2mm. I don't have a lot of ideas for where to go to purchase them.

We are fabricating piping components for refrigeration service. These components must be leak checked at 15 bar (218 psig). We are using a gas test media that is 25% helium and experiencing difficulty on maintaining a seal on the flanged connections. Do you know anyone or any references that could …

Could anyone please help me out with the following cryogenics data: Leather -- mechanical properties at 77 K or lower Nomex -- thermal conductivity @ 4 to 50 K I lost the data I had some time ago and although this should be easily accessible, I can't find any reference …

I am looking for thermal expansion data for quartz at cryogenic temperatures (20 - 300 K). Does anyone have any such data?

I’m looking for a process to freeze large volumes of plastics and rubber prior to submitting this mass of material to a grinding process that reduces it to a powder. Any thoughts? Any known processes which I can visit? Any known technologies? Can you refer me to other resources for …

Can you give me contact details for the manufacturer of a "sealant Adhesive" KAE 89? It is a vapor stop, used on insulation covering LNG carrying conduits. This is a suggested alternative to Foster 90-66. Do you have details of any other alternative products for this application?

Can you provide data or information on how to obtain data for thermal conductivity for phenolic high pressure laminate NEMA CE grade, at low temperatures (4 Kelvin to 100 Kelvin)?

Please help me with a definition: I am calculating material and fabrication costs for a quote for a hydrocarbon meter station.

We are a research team at the University of South Florida, studying the “thermal shock” on a steel cylinder when it is dropped into liquid nitrogen. We want to make sure that the thermocouple does not get influenced by the surrounding LN2. Any advice?

Here’s one for the scientists: We would like to sell vacuum insulated pipe for high temperature fluid applications. Are there any good getter materials that we can place in the vacuum space of our VJP to absorb outgassed materials at elevated temperatures?

I am looking for data on Carbon Fibres Reinforced Plastic at temperatures between 4 and 300K. I would appreciate it if someone could give me some hints on where to find it.