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Main Index > Markets > Industrial Applications > "Super" Insulating Perlite > Insulation Specifications

"Super" Insulating Perlite for Evacuated Cryogenic Service

EVACUATED PERLITE CRYOGENIC INSULATION SPECIFICATIONS
Density: 8 to 9.5 lb./ft3 (128 to 152 kg/m3)
Sieve Analysis (mesh is U.S. Standard) Max. 5% +30 mesh (0.6 mm)*
   Thermal Conductivity** 0.0047 Btu.in/h.ft2. F (0.0007 W/m.K)
* Tests have shown that the finer the material the better its preformance (Within the specified range). ** Thermal conductivity depends on  temperature, density, and sieve analysis of expanded perlite and the interstitial pressure. + At -160 F (-107 C), 8.7 lb/ft3 (139 kg/m3), 0.01u (1.33 mPa)

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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