EXFOLIATORS (AUST) PTY.LTD.

Leaders in the manufacture of Premium Perlite, Premium Vermiculite and Passive Fire Protection products.

Premium Cryogenic Perlite


Because of the unique properties of Perlite it has become accepted throughout the world as a very good insulator for cryogenic vessels. These include Shipping Containers, Transport Containers, Cold Boxes, on site storage tanks and Shipping Vessels. There are two specific areas of Cryogenics where insulation is used. They are EVACUATED and NON-EVACUATED.
EVACUATED
For cryogenic applications of -100°c and below, usually they are doubled wall storage spheres and vessels for the storage of Oxygen, Nitrogen and LNG. The thermal conductivity of Evacuated Perlite is much lower than Non-Evacuated Perlite. The density of Evacuated Perlite ranges between 125 and 150 kg per m³.Perlite for Evacuated applications must be dry with a moisture limit no great than 0.1% by weight. To maintain a dry Perlite various water/weather proofing options are available to ensure/provide product integrity. Perlite in paper bags should not be used.
NON-EVACUATED
Storage temperatures of -100°c and above are considered low temperature or Non-Evacuated cryogenics. Perlite in this range exhibits low thermal conductivity and excellent thermal insulation.
The density of Non-Evacuated Cryogenic Perlite has a range between 50-100 kg per m³. Typical non-evacuated installations for low temperature and cryogenic storage vessels are normally a double walled construction with the annulus filled with Perlite. For smaller vessels and tanks the Perlite can either be poured or blown into the cavity for insulation.
Packaging for non-evacuated should be the same as for evacuated. Store in moisture proof bags or tanks and do not use paper bags. Both products are packaged in 100 litre or 1.2m³ bulka bags.