1. Product description Pall ring is a new kind radom packing ring, developed based on Rasching ring, with equal diameter and height. Pall ring structure can improve distribution of liquid and gas,fully using the inside surface which helps the gas and liquid flow freely through the windows of the ring. Pall ring can be classified to ceramic, plastic and metallic pall ring by materials. 2. Technical specification 2.1. Ceramic Pall Ring Size (D×H×T) mm surface area m2/m3 Void space% Bulk density Kg/m3 No.elements per/m3 Packing factor m-1 Φ25 25×25×3 210 73 630 36000 540 Φ38 38×38×4 140 75 590 12000 332 Φ50 50×50×5 100 78 520 4900 210 Φ76 76×76×9 70 80 470 1500 137 Ceramic pall ring has excellent acid resistance and heat resistance. It can resist to corrosion of various inorganic acids, organic acids and organic solvents except hydrofluoric acid, and can be used in high or low temperature conditions. The ring can be used in the drying columns, absorbing columns, cooling towers, scrubbing towers and actifier columns in chemical industry, metallurgy industry, coal gas industry, oxygen producing industry, etc. 2.2. Plastic Pall Ring Size (D×H×T) mm surface aream2/m3 Void space% Bulk density Kg/m3 No.elements per/m3 Packing factor m-1 Φ25 25×25×1.2 213 91 85 48300 285 Φ38 38×38×1.4 151 91 82 15800 200 Φ50 50×50×1.5 100 92 60 6300 130 Φ76 76×76×2.6 72 92 62 1930 92 Plastic Pall ring is widely used in the packing towers in petroleum, chemical, alkali-chloride, coal gas industry and environmental protection etc. 2.3. Metallic Pall Ring size (D×H×T) mm surface aream2/m3 Void space% Bulk density Kg/m3 No.elements per/m3 Packing factor m-1 Φ25 25×25×0.5 219 95 393 51940 255 Φ38 38×38×0.6 146 96 318 15180 165 Φ50 50×50×0.8 109 96 314 6500 124 Φ76 76×76×1.2 71 96 308 1830 80 Metal Pall Ring is made of material like carbon steel, stainless steel or Aluminum alloy, etc. The product has features such as thin wall, heat resistant, high free volume, high capacity, low resistance, high separation efficiency and so on. It is especially suitable for rectification towers under vacuum to treat thermo sensitive, decomposable, polymerizable or cokable systems, so it is widely used in packing towers in petrochemical industry, chemical fertilizer industry and environmental protection, etc.
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