Cryogenic liquid cylinders, sometimes also referred to as Dewater, are insulated, vacuum jacketed, pressurized vessels. They come equipped with safety relief valves and rupture disks to alleviate pressure buildups

These cylinders come in a variety of sizes ranging from 80-450 liters. They can be equipped to provide gas through an internal vaporizer or provide liquid under their own internal vapor pressure. These cylinders are usually filled by the users at filling stations throughout the campus. All users must wear proper PPE when filling and discharging.

Cryogenic cylinders routinely relieve their internal pressure and you may observe a sudden hissing sound and the appearance of a fog. This is completely normal.

When using cryogenic cylinders, users should ensure that all valves and pressure relief devices are in place and in good condition. If pressure relief devices fail, catastrophic failure may result.