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Distillation Equipment Company Ltd

Random Packing

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Tel: +44 (0)1785 602810   Fax: +44 (0)1785 602811

Pall Rings

Pall Rings in PPL
Pall Rings in PPL

Pall rings are an industry standard 2nd generation random packing. This shape is the most common both in plastic and metal.

Compared to raschig rings, pall rings offer significantly more capacity (throughput) and lower pressure drop. The efficiency is also greater.

Pall Rings Nominal Size in. 1 2
Metal Surface Area m2/m3 340 207 132 102 59
Packing Factor m-1 230 177 144 86 56
Plastic Surface Area m2/m3 322 190 122 98 65
Packing Factor m-1 318 186 119 77 45

Saddles

Saddles in Ceramic
Saddles in Ceramic

Saddles are also a 2nd generation random packing and were originally developed in ceramic material as an improvement to raschig rings, giving lower pressure drop and better liquid distribution.

In ceramic material the saddle shape is still the most popular, but in metal or plastic they offer no significant advantages compared to pall rings.

Saddles Nominal Size in. ½ 1 2 3
Ceramic Surface Area m2/m3 620 260 190 120 90
Packing Factor m-1 656 330 170 131 72
Plastic Surface Area m2/m3   187   92 65
Packing Factor m-1   125   79 52
 

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