SCHUNDLER PRODUCT GUIDE--"Super" Insulating Perlite For Evacuated Cryogenic Service
...the pumpdown time necessary to achieve the low vacuum required. As a result, perlite must be fresh and packaged in moisture-proof bags or sealed tank trucks. Perlite bagged in paper sacks should not be used. Typical Evacuated Perlite Installation Field installation of perlite "super" insulation for large evacuated cryogenic vessels requires... See #2.
perforation
Working widths of up to 2 metres are available as standard, or machinery can be custom designed to individual requirements. arious Lengths Micro Perforation of laminated paper sacks and cement bags provides for improved weight content control by allowing air to escape during filling. STEWART perforated ventilated film can improve the... See #3.
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