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Main Index > Markets > Industrial Applications > Nonevacuated cryogenic and Low Temperature Service > Installation Specifications

Perlite for Nonevacuated Cryogenic and Low Temperature

NONEVACUATED PERLITE CRYOGENIC AND LOW TEMPERATURE INSULATION SPECIFICATIONS
Density: 3 to 6 lb./ft3
Sieve Analysis (mesh is U.S. Standard) Percent Weight Retained: Max. 10%=16 mesh (1.18 mm) Min. 50%=100 mesh (0.15 mm)
   Thermal Conductivity*   Temperature applications: (at mean temperatures of. -40 F or -40 C) 0.24-0.27 Btu.in/h.ft3.F (0.035-0.039 W/m. K)
Nonevacuated Cryogenic Applications: (at mean temperatures -195 F or -126 C) 0.17-0.20 Btu.in/h.ft3.F (0.025-0.029 W/m. K)
*Thermal conductivity varies with temperature, density, pressure, and conductivity of the gas which fills the annulus or insulation space.

Information given herein is from sources considered reliable, but no guarantee of accuracy can be made or liability assumed.  Your supplier may be able to provide you with more precise data.  Certain compositions or processes involving perlite may be the subject of patents.
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