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Plastic Pall Ring

Pall Ring

Pall Ring

An advance on the Raschig Ring, the Pall Ring has similar cylindrical dimensions but has two rows of punched out holes, with fingers or webs turned into the center of the cylinder, which significantly increases the performance of the packing, in terms of throughput, efficiency and pressure drop. We are able to offer these in a variety of plastics: 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
Size
mm
Surface Area
(m2/m3)
VoidageBulk Number
(n/m3)
Bulk Density
(kg/m3)
Dry Packing Factor
(m-1)
16 × 16 × 1 188 91% 170000 85 275
25 × 25 × 1.2 175 90% 53500 69 239
38 × 38 × 1.4 115 89% 15800 69 220
50 × 50 × 1.5 93 90% 6500 52 127
76 × 76 × 2.6 73.2 92% 1927 48 94
100 × 100 × 3 52.8 94% 1000 48 82
Table 2: The Technical Parameter of Plastic Pall Ring PTFE
Size
(mm)
Surface Area
(m2/m3)
Voidage
%
Number
(n/m3)
Bulk Density 304
(kg/m3)
20 267 92.8 110000 522
25 219 93.4 56000 423
38 165 94.6 14000 368
50 113.5 94.9 6500 390
65 84 94.8 4600 480
76 73 92 1850 328
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