Owing to its thin wall, high void and capacity, low fluid resistance, and heat & corrosion resistance, metallic packings, include carbon steel or stainless steel, applied to handle the thermal- sensitive, hard to separation and easy carbonized materials in the vacuum rectifying towers. Metallic random packings include Conjugated rings, VSP ring, Intalox saddles, Twin curved saddles, HQM flat ring, Cascade ring and Pall ring. Features: 1) Made of carbon steel, stainless steel, and aluminum alloy 2) Main types: pall ring, hypack, raschig rings, saddles, cascade mini rings 3) Thin 4) Heat resistant 5) Big flow 6) Low physical resistance 7) High separation efficiency 8) Especially suitable for the vacuum rectifying apparatus, processing the thermo-sensitive, easy-decomposition, and easy-coking materials 9) Widely used in the packing towers in petrochemical industry, fertilizer industry, and environmental protection industry 10) Application: mass transfer media.