Refer to Table 10-4.

a. Which is more desirable, a high or low packing factor, \(\mathrm{F}\) ?

b. As packing size increases, does \(\mathrm{F}\) increase or decrease? What is the functional form of this change (e.g., linear, quadratic, cubic)?

c. Why do ceramic packings have higher \(\mathrm{F}\) factors than plastic or metal packings of the same type and size? When would you choose a ceramic packing?

Table 10-4

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TABLE 10-4. Parameters for dumped packings (F is ft1). Sizes are nominal, inches Packing Type Raschig rings 1/4 1/2 5/8 3/4 1 11/22 3 (1/32-in. metal wall) F 700 300 170 155 115 - 1.20 - 0.28 Raschig rings (1/16-in. metal wall) F- - 410 290 220 137 83 57 32 0.80 0.42 0.29 0.23- - 0.30 0.21 0.20 0.14- Raschig rings (ceramic) F 1600 580 380 255 155 95 65 37 3.10 2.35 1.34 0.97 0.39 0.24 0.18 Pall rings (plastic) F Pall rings (metal) F 0.41 0.26 0.26 0.25 0.23 0.17 0.15 97 - 52 32 25 - 0.22- 0.10- - 0.14- 0.12- - 70 0.43 - - 48 28 20 - 0.15 0.08 0.06- Berl saddles F 900 240 0.17 - 0.16 0.13 0.12- 45 (ceramic) - 1.2 - 0.21 - 170 110 65 0.62 0.39 0.21 0.16- 0.17 0.17 0.13 0.12- Intalox saddles F 725 200 - 145 98 52 40 22 (ceramic) - 1.04- 0.52 0.52 0.13 0.14- 0.37- 0.25 0.16 0.15 0.1- Intalox saddles (plastic) F- 33 21 16 Intalox saddles (metal) F 41 - 18 - Flexirings (plastic) F 78 - 45 28 22 Ballast ring (plastic) F- 97 32 Cascade mini-ring (plastic) F Hy-Pak plastic 30 25 25 15 - F 25 - 12 -