... low fluid resistance, and heat & corrosion resistance, metallic packings, include carbon steel or stainless steel, applied to ... carbonized materials in the vacuum rectifying towers. Metallic Random Packings Metallic random packings include Conjugated rings, VSP ring, ... HQM flat ring, Cascade ring and Pall ring.Metallic Random Packings NameNormalmm Diameter×Height×ThicknessmmSurface aream2/m3Void space ...