Bert saddles

Lower pressure drop (less than half) than Raschig rings, also lower HTU (in some systems also lower than Bert saddles), higher flooding limit. Good liquid distribution, high capacity. Considerable side thmst on column wall. Available in metal, plastic and ceramic. 

Available in plastic, lower pressure drop and HTU values, higher flooding limits than Raschig rings or Bert saddles. Very low unit weight, low side thrust. 

Figure 9-91. H correlation for various sizes of Bert saddles. Reproduced by permission of the American Institute of Chemical Engineers, Cornell, et al.. Chemical Engineering Progress, V. 56, No. 8 (1960) p. 68 eill rights reserved.

X in. Raschig rings o I in. ceramic Bert saddles I in. ceramic Intalox saddles... 

RascMg Rings—Meta/ Bert Saddles—Ceramic No. 2 No. 3... 

Random packings Raschig riii, plain and slotted, metal and ceramic Other ring-type packings Bert saddles Intalox saddles, ceramic and metal Other saddle-type packings Specialty random packiiigs... 

Bert saddles of the same size, because they provide substantially larger interfacial area, led to packed depths equal to roughly six-tenths of these values, with approximately a 30 percent reduction in gas-pressure drop per meter, at the same mass velocities (although in this instance pressure drop is unimportant). A choice between such packings as these, Pall rings, Intalox saddles, and the like then revolves about their relative cost, not per cubic meter but for the complete tower. 

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