All greases are solid at LOx temps, you need teflon or Kel-F bearing
surfaces.
Otherwise Krytox, Fluorolube,etc. for more modest temps.
Graphite for liquid methane and other non oxidizer cryo service.
Ken
On Sun, Feb 19, 2023 at 3:36 AM Rocket Pavitra <pavitrapatel.astro@xxxxxxxxx>
wrote:
What are the different options for lubricants to use for valves that carry
cryogenic fluids (liquid oxygen/methane).
I searched online and can't seem to find one that can work well below -112
degree celsius.
Since Liquid oxygen is -183 and liquid nitrogen -210 there must be some
sort of lubricant that is used in valves that operate with cryo fluids.
- Pavitra