Random Packing - Metal, Plastic and Ceramic Materials

Random packing is widely used in the packing towers for gas and liquid, separating, absorbing, cooling and other applications. Random packing has different types with the materials and structure improvement. Here are some main types of random packing, just refer to them and find the perfect one you need.

Raschig Ring

Raschig ring is the simplest structure of all types of random packing. The diameter size is same as the height, which is similar to the pall ring. The large size which the diameter is larger than 100 mm Raschig ring is commonly filled neatly when using, but the smaller size which the diameter is smaller than 75 mm is commonly filled in huddle.

Raschig ring can be made of metal, ceramic and plastic. The structure of metal Raschig ring is similar as the ceramic pall ring, which has smooth cylinder wall and simplest structure.

Four stainless steel Raschig ring on the gray background.
RP-01: Metal Raschig ring.
Three plastic Raschig ring on the gray background.
RP-02: Plastic Raschig ring.
Six ceramic Raschig ring on the gray background.
RP-03: Ceramic Raschig ring.
Specifications of Raschig ring
Item Material Size
(D × T × H )
(mm)
Surface area
(m2/m3)
Voidage
(%)
Bulk density
(kg/m3)
Filling quantity
RPRR-01 Metal 16 × 0.5 × 16 350 90 660 2480000
RPRR-02 Metal 25 × 0.8 × 25 220 93 610 55000
RPRR-03 Metal 50 × 1.0 × 50 110 95 430 7000
RPRR-04 Metal 80 × 1.0 × 80 60 96 400 1820
RPRR-05 Plastic 25 × 1.0 × 25 210 90 88 48500
RPRR-06 Plastic 50 × 1.5 × 50 105 92 65 6500
RPRR-07 Ceramic 6 × 2 × 6 789 73 750 3110000
RPRR-08 Ceramic 10 × 2× 10 460 70 700 720000
RPRR-09 Ceramic 15 × 2 × 15 350 70 700 250000
RPRR-10 Ceramic 25 × 2.5 × 25 235 78 600 49000
RPRR-11 Ceramic 38 × 4 × 38 178 75 550 12700
RPRR-12 Ceramic 50 × 5 × 50 136 81 530 6800
RPRR-13 Ceramic 80 × 8 × 80 108 68 650 1930
RPRR-14 Ceramic 100 × 10 × 100 90 70 680 1000
RPRR-15 Ceramic 150 × 15 × 150 75 68 700 295

Pall Ring

Pall ring is the improved products of Raschig ring. Compared with Raschig ring, the features of pall ring is the diameter size is same as the height. Besides, there are two layers of window on the cylinder wall. And each wall have five ligules bending inward. The structure may different according to the material and diameters.

The openings on the cylinder wall let the pall ring make full use of the inner surface and improve the separating and absorbing efficiency. The flux of pall ring improves 50% than the Raschig ring but the pressure drop reduce half.

The material of pall ring is commonly metal, plastic and ceramic. Metal pall ring can be stainless steel, carbon steel and other alloy steel. They have outstanding corrosion and rust resistance performance in the chemical and other harsh using environments. The plastic pall ring has outstanding temperature resistance, it can remain perfect condition no matter in the subzero or high temperature environments. The ceramic pall ring has thicker thickness than the metal or plastic pall ring. It may has high absorbing efficiency in all conditions.

Five metal pall ring on the black background.
RP-04: Metal pall ring.
Five plastic pall ring on the black background.
RP-05: Plastic pall ring.
Six ceramic pall ring on the black background.
RP-06: Ceramic pall ring.
Specifications of pall ring
Item Material Size
(D × T × H )
(mm)
Bulk density
(kg/m3)
Filling quantity Surface area
(m2/m3)
Voidage
(%)
RPPR-01 Metal 16 × 0.3 × 16 360 201000 346 95.5
RPPR-02 Metal 25 × 0.4 × 25 302 5100 212 96.2
RPPR-03 Metal 25 × 0.5 × 25 400 54000 216 95
RPPR-04 Metal 25 × 0.6 ×25 461 5400 219 94.2
RPPR-05 Metal 38 × 0.4 × 38 262 15180 145 96.7
RPPR-06 Metal 38 × 0.6 × 38 328 15000 146 95.9
RPPR-07 Metal 50 ×0.5 × 50 194 6500 106 97.5
RPPR-08 Metal 50 × 0.7 × 50 285 6500 108 96.4
RPPR-09 Metal 50 × 0.9 × 50 365 6500 109 95.4
RPPR-10 Metal 76 × 0.8 × 76 205 183 69 97.4
RPPR-11 Metal 90 × 1.0 × 90 229 1160 62 97.1
RPPR-12 Plastic 16 × 1 × 16 141 230000 260 91
RPPR-13 Plastic 25 × 1.2 × 25 85 48300 213 91
RPPR-14 Plastic 38 × 1.4 × 38 82 15800 151 91
RPPR-15 Plastic 50 × 1.5 × 50 60 6300 100 92
RPPR-16 Plastic 76 × 2.6 × 76 62 1930 72 92
RPPR-17 Ceramic 38 × 4 × 38 570 13400 150 75
RPPR-18 Ceramic 50 × 5 × 50 550 6800 120 78
RPPR-19 Ceramic 80 × 8 × 80 520 1950 75 80

Intalox Saddle Ring

Intalox saddle ring, as its name says, the shape is similar to the saddle, but its shapes is between the ring and saddle. This design make full use of the advantage of ring and saddle. It can not only benefit for the liquid distribution, it can also improve the flux of gas. Compared with pall ring, it has larger flux, less resistance and higher efficiency. Additional, it has high rigid and mechanical strength, it is the most widely used type among all the random packing.

The material of intalox saddle ring can also be stainless, plastic and ceramic. Intalox saddle ring is mainly used in the drying towers, absorption tower, cooling tower, washing tower and regeneration tower of chemical, metallurgy, coal gas and environmental protection industries.

Three stainless steel Intalox Saddle ring on the gray background.
RP-07: Metal Intalox saddle ring.
Two plastic Intalox Saddle ring on the gray background.
RP-08: Plastic Intalox saddle ring.
Three ceramic Intalox Saddle ring on the gray background.
RP-09: Ceramic Intalox saddle ring.
Specifications of Intalox saddle ring
Item Material Size
(D × T × H )
(mm)
Surface area
(m2/m3)
Voidage
(%)
Bulk density
(kg/m3)
Filling quantity
RPSR-01 Metal 25 × 0.3 × 15 171 97.6 188 87720
RPSR-02 Metal 38 × 0.4 × 16.5 123 97.7 181 38160
RPSR-03 Metal 50 × 0.5 × 29 79 98.2 141 11310
RPSR-04 Metal 76 × 0.6 × 35.5 55 98.5 118 4250
RPSR-05 Plastic 25 × 1.2 ×12.5 288 85 12 97680
RPSR-06 Plastic 38 × 1.2 ×19 265 95 91 25200
RPSR-07 Plastic 50 × 1.5 × 25 250 96 75 9400
RPSR-08 Plastic 76 × 3.0 × 38 200 97 59 3700
RPSR-09 Ceramic 16 × 3 × 12 378 71 690 269900
RPSR-10 Ceramic 25 × 3 × 20 200 77 600 58230
RPSR-11 Ceramic 38 × 4 × 30 138 80 580 19680
RPSR-12 Ceramic 50 × 6 × 42 115 79 550 8246
RPSR-13 Ceramic 76 × 9 × 53 86 75 520 2400

Cascade Mini Ring

The cascade mini ring is the advanced product of pall ring. The feature of cascade mini ring is the ratio of height and diameter is 1:2, and cone-shaped flange is added onto the end of the Cascade mini ring. It can not only improve the mechanical strength, it can also reduce the gas passing resistance and increase the flux. Additional, the liquid and gas has uniform distribution and then the separating efficiency is improves through increasing the contact area.

Cascade mini ring can also be made of metal, plastic and ceramic materials. And the structure of cascade mini ring may different according to different materials and diameters.

Cascade mini ring is widely used in the packed towers in petroleum, chemical, chlor-alkali, coal gas, environmental protection and other industries.

Two stainless steel Cascade mini ring on the green background.
RP-10: Metal Cascade mini ring.
Three plastic Cascade mini ring on the green background.
RP-11: Plastic Cascade mini ring.
Three ceramic Cascade mini ring on the green background.
RP-012: Ceramic Cascade mini ring.
Specifications of Cascade mini ring
Item Material Size
(D × T × H )
(mm)
Surface area
(m2/m3)
Voidage
(%)
Bulk density
(kg/m3)
Filling quantity
RPCR-01 Metal 25 × 0.5 × 12.5 221 95 383 98120
RPCR-02 Metal 38× 0.6 × 19 153 96 325 30040
RPCR-03 Metal 50 × 0.8 × 25 109 96 308 12340
RPCR-04 Metal 76× 1.2 × 38 72 96 306 3540
RPCR-05 Plastic 25 × 1.2 × 12.5 228 90 98 81500
RPCR-06 Plastic 38 × 1.4 × 19 133 93 58 27200
RPCR-07 Plastic 50 × 1.5 × 25 114 94 55 10740
RPCR-08 Plastic 76 × 3.0 ×38 90 93 698 3420
RPCR-09 Ceramic 25 × 3 × 17.5 250 74 650 66960
RPCR-10 Ceramic 38 × 4 ×28 175 73 630 17540
RPCR-11 Ceramic 50 × 5 × 30 149 72 580 8980
RPCR-12 Ceramic 60 × 5 × 35 149 72 560 7676
RPCR-13 Ceramic 76 ×7 × 45 60 69 530 2400

Features of random packing

  • High flux.
  • Low pressure drop.
  • Low resistance.
  • High efficiency.
  • Different sizes to satisfy different applications and efficiency requirements.
  • Various materials to be used in different environments.
  • Ceramic random packing has outstanding acid resistance and temperature resistance. It ca resist all the organic acid, inorganic and organic solvents except the hydrochloric acid.

Applications of Random packing
Random packing is widely used in the chemical, metallurgy, coal gas, environmental protection industries for gas and liquid separations in dying towers, absorption towers, cooling towers, washing towers and regeneration towers.

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