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Pall Plastic Rings

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Pall Ring

Pall Ring

Despite the fact that the Raschig Ring and Pall Ring have similar cylindrical dimensions, the advantage of the Pall ring is two rows of punched holes with the tabs curved inwards, which significantly increases the performance of the packing in relation to throughput, efficiency and pressure drop. We can offer this type of packing in various plastic variations: polypropylene, PVDF, HDPE, glass-filled polypropylene and PVC.

    Capacity versus Pressure Drop
  • Most suited in low pressure drop, high capacity applications;
  • A range of sizes allows the tower to operate at an optimum efficiency and throughput;
  • Consistent ratio of free and blocked passages, independent of orientation;
  • Large surface area: volume ratio augments the rate of liquid film surface renewal to improve mass transfer.
    Hold-up and Two-phase Contact
  • Promotes highly efficient two-phase contact and distribution;
  • A relatively high liquid hold-up promotes high absorption efficiencies, especially in cases where the reaction rates are slow;
  • Uninterrupted and consistent passages for gas and liquid flow.
    Versatility
  • Open, cross-linked design provides a highly efficient used of the ring’s surface area;
  • Robust to variations in liquid and vapor distribution.
    Mechanical Strength
  • Its internal cross-structure of diametrical spars make it mechanically robust and suitable for use in deep packed beds.
Table 1: The Technical Parameter of Plastic Pall Ring
Article Size
mm
Surface Area
(m2/m3)
Voidage Bulk Number
(n/m3)
Bulk Density
(kg/m3)
Dry Packing Factor
(m-1)
1001182 16 × 16 × 1 188 91% 170000 85 275
1015405 25 × 25 × 1.2 175 90% 53500 69 239
1020248 38 × 38 × 1.4 115 89% 15800 69 220
1019281 50 × 50 × 1.5 93 90% 6500 52 127
1019282 76 × 76 × 2.6 73.2 92% 1927 48 94
1019283 100 × 100 × 3 52.8 94% 1000 48 82
Table 2: The Technical Parameter of Plastic Pall Ring PTFE
Article Size
(mm)
Surface Area
(m2/m3)
Voidage
%
Number
(n/m3)
Bulk Density 304
(kg/m3)
1019286 20 267 92.8 110000 522
1019287 25 219 93.4 56000 423
1019288 38 165 94.6 14000 368
1019289 50 113.5 94.9 6500 390
1019290 65 84 94.8 4600 480
1019291 76 73 92 1850 328
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