Stainless Steel Dixon Ring (Theta Ring) Packing – Precision Separation for Lab & High-Purity Processes​​

SS304 SS316 Stainless Steel Dixon Ring (1)
SS304 SS316 Stainless Steel Dixon Ring (1)
​​Dixon Ring Packing – Precision in Small-Scale Separation​​
When your separation process demands high purity and precise control on a small scale, Dixon rings (also called Theta rings) deliver unmatched efficiency. Originally developed by Dr. Dixon in 1947, these wire mesh packings remain a top choice for laboratory distillation, pilot plants, and high-value chemical purification. Their balanced design ensures excellent mass transfer with minimal pressure drop – making them ideal for sensitive separations where every theoretical plate counts.
We appreciate packings that perform under precision conditions. Dixon rings work because their uniform wire mesh structure provides complete surface wetting and rapid film formation. This means faster equilibration and sharper separations, even with complex mixtures like isotopes or high-purity intermediates.

SS304 SS316 Stainless Steel Dixon Ring (2)
SS304 SS316 Stainless Steel Dixon Ring (2)
​​Clear Specifications – Easy Sizing​​
Size (D×H mm)
Mesh Type
Surface Area (m²/m³)
Bulk Density (kg/m³)
Theoretical Plates/m
2×2
100
3500
670
50–60
3×3
100
2275
520
40–50
4×4
100
1525
380
30–40
5×5
100
1180
295
20–30
6×6
80
1127
280
17–20
7×7
80
1095
265
14–17
8×8
80
987
235
11–14
9×9
80
976
200
8–11
​​Where Dixon Rings Excel​​
  • Laboratory and pilot-scale distillation
  • High-purity chemical and pharmaceutical separation
  • Isotope separation and development
  • Fine chemical and specialty intermediate purification
​​Why Choose Dixon Rings?​​
  • ​​High Efficiency:​​ More theoretical plates per meter than most random packings.
  • ​​Rapid Response:​​ Low hysteresis accelerates process stabilization.
  • ​​Full Wetting:​​ Mesh structure ensures complete liquid distribution.
  • ​​Flexible Sizing:​​ Available from 2mm to 9mm for column diameters from 20mm to 300mm.
If you need reliable, repeatable results in small-scale separation, Dixon rings offer the precision and performance you can trust.
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