Which alumina grade of inert ceramic ball should I choose for catalyst bed support?

Standard 17–23% Al2O3 inert balls suit most hydrotreating and reforming catalyst supports. Choose 23–30% for higher crush strength, and 99% alumina where high-temperature steam could cause silica leaching that would poison downstream catalysts.

What information do you need to recommend tower packing?

Please share the tower diameter and bed height, the service (distillation, absorption, stripping or scrubbing), the medium and its corrosivity, operating temperature and pressure, and any pressure-drop or capacity targets. Our engineers then propose packing type, material and size.

Can I receive samples and technical data sheets before ordering?

Yes. Samples of standard sizes and technical data sheets covering chemical composition, bulk density, crush strength and other key properties can be provided for evaluation before a production order.

How are ceramic and metal packing products packed for export?

Depending on product and volume, we use cartons, jumbo bags, plastic drums or wooden cases on fumigation-free or fumigated pallets, with clear marking for each size and batch to simplify site receiving.

Where is Zhongtai located and can buyers visit the factory?

We are based in Pingxiang, Jiangxi Province, a recognized Chinese hub for industrial ceramics and chemical packing. Buyers and third-party inspectors are welcome to visit; Korean customers audited our ceramic production in July 2018.

Wholesale 304 316L Stainless Steel Metal Dixon Ring (Theta Ring) Wire Mesh Random Packing for Laboratory & High Purity Distillation Pricelist, Quotes

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Wholesale 304 316L Stainless Steel Metal Dixon Ring (Theta Ring) Wire Mesh Random Packing for Laboratory & High Purity Distillation Pricelist, Quotes

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Product Description

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.

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.

Size (mm)	Mesh	Suitable Tower ID (mm)	Theoretical Plates (per m)	Bulk Density (kg/m³)	Surface Area (m²/m³)	Void Fraction (%)	Pressure Drop (mbar/m)
φ2×2	100	φ10–φ35	60–65	670	3700	91	30
φ3×3	100	φ20–φ50	50–55	520	2800	93	15
φ4×4	65–100	φ20–φ70	30–32	380	1700	95	10
φ5×5	60–100	φ20–φ100	15–20	295	1100	95	10
φ6×6	60–80	φ20–φ150	12–15	280	950	95	10
φ7×7	80	φ20–φ200	14–17	265	800	95	8
φ8×8	60–80	φ20–φ250	10–12	235	750	95	8
φ10×10	60–80	φ20–φ1200	7–8	200	550	95	8
φ12×12	60–80	φ150–φ1500	10	~180	450	96	6
φ15×15	60	φ200–φ2000	4–8	~150	320	98	5

Frequently Asked Questions (FAQ)

❓ What is a Metal Dixon Ring (Theta Ring)?

A Metal Dixon Ring, or Theta Ring, is a precision random packing made of fine wire mesh. It is uniquely engineered for high-efficiency laboratory distillation and fine chemical separation, offering exceptional mass transfer surface area.

❓ How does the wire mesh structure enhance separation efficiency?

The fine wire mesh creates a powerful capillary action that completely and uniformly wets the entire surface, creating an ultra-thin liquid film that minimizes channeling and drastically improves vapor-liquid contact.

❓ What column diameter is suitable for Dixon Rings?

Dixon Rings are ideal for small-scale and pilot columns, typically ranging from φ10 mm to φ200 mm inner diameter, though specialized larger sizes can be applied up to φ2000 mm.

❓ What materials are available for corrosive distillation systems?

Dixon Rings can be fabricated from various corrosion-resistant metals, including AISI 304, AISI 316L stainless steel, pure nickel, and Hastelloy alloys, catering to high-temperature and harsh chemical environments.

❓ What is the advantage of double-layer Dixon Rings?

For sizes starting from 5×5 mm, double-layer wire mesh options enhance structural rigidity, prevent deformation under packing weight, and increase separation efficiency compared to single-layer configurations.