| ●For random packing in a column having a diameter approximately ten times larger than that of a Raschig ring, a required quantity of rings is calculated by : | |||
 |  n＝Quantity of rings in 1 m3D＝Diameter of Raschig ring C＝0.77 (Constant for random packing) | ||
| For packing Raschig rings, Lessing rings and other annular products in order, the constant C=1.0. | |||
Stainless steel, iron, aluminum, copper
| H.Feat | 1.62 | 1.37 | 1.19 | 1.09 | 0.97 | 0.90 | 0.78 |
|---|---|---|---|---|---|---|---|
| Pressure mmHg | 20 | 30 | 40 | 50 | 60 | 70 | 90 |
[1] High mechanical strength
[2] Light weight
[3] Uniformly layered with less probability of breakage
[4] High corrosion resistance
[5] Easy handling
[6] Applicable to columns of relatively large diameters
| Diameter mm×Height mm×Wall Thickness mm | Mesh(pcs/m3) |
|---|---|
| 5φ×5H×0.4ｔ | 7,200,000 pcs |
| 10φ×10H×0.3ｔ | 770,000 pcs |
| 12φ×12H×0.3ｔ | 446,000 pcs |
| 15φ×15H×0.5ｔ | 230,000 pcs |
| 20φ×20H×0.6ｔ | 110,000 pcs |
| 25φ×25H×0.5ｔ | 50,000 pcs |
| 35φ×35H0.5ｔ | 17,000 pcs |
| 40φ×40H×0.5ｔ | 12,000 pcs |
| 50φ×50H×2.0ｔ | 6,160 pcs |
SUS304、316、316L
● A Pall ring has the same diameter and height, but is different from a Raschig ring in that several portions of the side wall are cut and bent inward so that a gas and a liquid can more efficiently come into contact with each other, achieving a lower pressure loss and a lower HETP than those of a Raschig ring. Pall rings are available in diameters of 12 mm (1/2 inch) or more.
| Diameter mm×Height mm×Wall Thickness mm | Qty/m3 | Surface Area | Void Ratio | Density |
|---|---|---|---|---|
| 12.7φ × 12.7H × 0.4ｔ | 410,000 | 430m2/m3 | 91.9% | 640kg/m3 |
| 15.8φ × 15.8H × 0.4ｔ | 230,000 | 370m2/m3 | 92.9% | 560kg/m3 |
| 25.4φ × 25.4H × 0.6ｔ | 51,000 | 210m2/m3 | 93.9% | 480kg/m3 |
| 38.1φ × 38.1H × 0.8ｔ | 15,200 | 140m2/m3 | 94.6% | 430kg/m3 |
| 50.8φ × 50.8H × 0.8t | 6,500 | 110m2/m3 | 95.8% | 330kg/m3 |
SUS304、316、316L
[1] Applicable to columns of relatively large diameters
[2] High void ratio and low pressure drop
[3] High throughput capacity
[4] Easy packing
[5] Low cost
[6] Applicable both to laboratory and industrial uses
| Size | Mesh | Surface Area | Void Ratio | Density | HETP |
|---|---|---|---|---|---|
| 6mm(1/4") | #42×100 | 1,590m2/m3 | 96.7% | 380kg/m3 | 5cm |
| 10mm(3/8") | #38×80 | 1,405m2/m3 | 94.6% | 420kg/m3 | 10～15cm |
| 〃 | #38×60 | 1,137m2/m3 | 95.6% | 340kg/m3 | 〃 |
| 〃 | #36×60 | 1,185m2/m3 | 94.3% | 450kg/m3 | 〃 |
| 15mm(1/2") | #36×60 | 922m2/m3 | 95.5% | 450kg/m3 | 10～20cm |
| 〃 | #36×50 | 843m2/m3 | 95.9% | 320kg/m3 | 〃 |
| 20mm(3/4") | #34×40 | 693m2/m3 | 95.9% | 320kg/m3 | 20～25cm |
| 〃 | #32×35 | 556m2/m3 | 96.2% | 300kg/m3 | 〃 |
| 25mm(1") | #34×40 | 392m2/m3 | 97.7% | 180kg/m3 | 25～30cm |
| 〃 | #30×30 | 327m2/m3 | 97.4% | 202kg/m3 | 〃 |
SUS304、316、316L
[1] Very low HETP
[2] Low pressure drop
[3] Specifically advantageous for vacuum distillation
[4] Easily replaceable
● A flat section of thin wire mesh is formed into a cylindrical shape with one end curved in an in ward S shape to intersect the inner space, so that Dixon packing is also known as S-shaped partition packing.
By preflooding several times, a higher efficiency is achieved
| Size | Mesh | Surface Area | Void Ratio | Density | HETP |
|---|---|---|---|---|---|
| 3.0mm(1/8in) | #42×100 | 3,009m2/m3 | 92.4% | 600g/l | 1.5～2cm |
| 6.0mm(1/4in) | #38×60 | 996m2/m3 | 96.2% | 350g/l | 2.5～3cm |
| 10mm(3/8in) | #36×50 | 580m2/m3 | 96.5% | 280g/l | |
| 15mm(5/8in) | #36×50 | 400m2/m3 | 97.6% | 190g/l | |
| 20mm(3/4in) | #34×40 | 240m2/m3 | 98.1% | 150g/l | |
| 25mm(1in) | #34×40 | 210m2/m3 | 98.4% | 130g/l |
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