Metal Dixon Ring, also widely known as Theta Ring (θ Ring), Q Ring, or Dixone Packing, is a high-efficiency laboratory random packing developed by British scientist O.G.Dixon in 1949. Derived from the classic Raschig Ring, it is manufactured from fine metal wire mesh with precisely equal diameter and height. It is the preferred packing for small-diameter laboratory distillation columns and high-purity product separation processes.

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Product Highlights

• Superior Capillary Action: The fine wire mesh (60-100 mesh) generates a powerful capillary effect, dispersing liquid uniformly into a thin film across the packing surface. This significantly enhances gas-liquid mass transfer and heat exchange while effectively eliminating channeling and wall flow.
• Exceptional Theoretical Plate Count: Delivers 50-65 theoretical plates per meter for 2mm rings, far exceeding conventional random packings. The theoretical plate number increases with gas velocity, making it ideal for precision batch distillation.
• High Liquid Holdup & Wettability: The mesh structure retains more liquid than solid packings of the same size, with superior surface wetting performance. This results in a higher film formation rate and significantly improved separation efficiency.
• Low Pressure Drop: The open structure with 91-97% void fraction minimizes resistance to gas flow, ensuring stable operation and reduced energy consumption.
• Corrosion & Heat Resistance: Constructed from 304, 316L stainless steel, pure nickel, or Hastelloy, it withstands aggressive chemicals and high temperatures for reliable long-term service.
• Double-Layer Design Available: For sizes 5×5 mm and above, double-layer construction significantly improves mechanical strength and separation performance compared to single-layer counterparts.