The tri-Y shape packing is a kind of new packing models. On the base of the casade ring, conjugate ring, suppermini ring intalox, complexly attending to the shape, appearance and structure, it is renewed by keeping advance from disadvance, can be produce by ceramic, plastic, metals, it is a brand-new packing. The patent is recevied in 1998. The products features are the structure is special, high capacity, large specific surface, gas-liquid distribution, low pressure drop, high strength, gas-liquid transference function better then common packings. Usage: chemical, petrochemical, fertilizer, sulfuric acid, fine chemical, medicine, environmental protection etc. The utilization has a good result in Dalian petrochemical plant, Zhenhai petrochemical refinery, Lanzhou chemical refinery. Item Material Size mmD×H×δ mmmSpecific aream2/m3Void volumem3/m3Number per volumen/m3Bulk densityKg/m3Drying packing factorm-1Plasticφ2616×10×0.44009330650070331φ2525×13×0.7300929630080205φ3838×20×0.9170912825076127φ5050×30×1.513090125005290Ceramicφ1616×10×1.525087300501150140φ2525×13×21808587040800106φ3030×16×2.5170855500085098φ3838×20×3.5140852750090590φ5050×30×4.5110841010088088Metalsφ1616×10×0.241095320000340320φ2525×13×0.532093100200480200φ3030×16×0.62509258050420160φ3838×20×0.71809030050450120φ5050×30×0.8120881500038085