Cryogenic insulation
PERLITA Y VERMICULITA is a Spanish company that owns a portable expanded perlite furnace to product cryogenic insulation on-site.
Cryogenic or low temperature insulation with expanded perlite produces a very low level of heat conductivity due to a wide range of densities. The recommended density is between 48 and 72 Kg / m3 (3 to 4 lb / ft3). This wide range of densities makes expanded perlite an ideal and versatile insulator.
Cryogenic insulation with expanded perlite has many advantages over other systems:
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Cryogenic insulation with expanded perlite is produced in a wide variety of storage vessels. Although the majority are made with a double wall and a surrounding vessel filled with expanded perlite, on occasions an empty space is left in the surrounding vessel (100 mm Hg).
For small vessels, bulk perlite can be used in vessels manufactured in the factory designed to store cryogenic gases. However, for large storage vessels, ships and tanks with double walls, we use the portable furnace to be able to expand the perlite on site. Expanded perlite can be manufactured with densities ranging from 32 Kg/m3 (2 lb/ft3) to 240 Kg/m3 (15 lb/ft3).
Due to its properties, expanded perlite is the best natural insulator for cryogenic and low temperature tanks in shipment containers, refrigerators, test chambers and food processing units.
Temperatures of -100 °C (-150 °f) or below are considered cryogenic, and temperatures above 4 °C (-40 °f) are considered low temperature. Extremely cold fluids such as oxygen, hydrogen and argon are insulated in double-walled vessels with perlite-filled ring-shaped spaces.
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