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Pall ring
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Pall ring, Pall rings,PP Pall ring, PVC PALL RING, CPVC PALL RING, PVDF pall ring, PTFE pall ring,Ceramic Pall ring, Metal Pall ring, Improved pall ring, Hy pak---T.C.I Co., ltd
We can supply PP, PVC,CPVC, PVDF, PE, 60%CL CPVC, PTFE (Teflon),
And Carbon steel, SS304, SS316, Alloy, etc.
Pall ring is the offshoot of raschig ring, the improvement was made by BASF (Badische Aniline Soda Fabric) Aktiengesellschaft in the early 1950s. Pall ring is a hollow cylindrical element of dia equal to its length while ten fingers punched from the cylinder wall extend into the interior of the packing element.
Although the pall ring has the same geometric surface area as the Raschig ring, the interior surfaces of the pall ring are much more accessible to gas and liquid flows due to the opening thru the wall.
Features:
Low pressure drop, high flux, high efficiency.
Materials:
stainless steel, carbon steel, aluminum, 340L, 316L, steel, carbon steel etc.
Metal Pall ring Spec.( steel)
| Model NO. |
Spec. D×H×δ
mm |
Specific surface α
m2/m3 |
Void ratio ε
% |
Piling NO. n
m-3 |
Piling Weight γρ
kg/m3 |
Dry filler factor F
m-1 |
| Dg16 |
16×16×0.5 |
311 |
0.93 |
244000 |
539 |
455 |
| Dg25 |
25×25×0.6 |
233 |
0.937 |
64000 |
489 |
252 |
| Dg38 |
38×38×0.8 |
129 |
0.945 |
18220 |
432 |
153 |
| Dg50 |
50×50×1.0 |
112.3 |
0.949 |
8000 |
395 |
131 |
| Dg76 |
76×76×1.5 |
70 |
0.952 |
2270 |
374 |
81 |
Plastic Pall ring Spec.(PP)
| Model NO. |
Spec. D×H×δ
mm |
Specific surface α
m2/m3 |
Void ratio ε
% |
Piling NO. n
m-3 |
Piling Weight γρ
kg/m3 |
Dry filler factor F
m-1 |
| Dg16 |
16×16×1 |
188 |
0.91 |
244000 |
141 |
275 |
| Dg25 |
25×25×1.2 |
175 |
0.90 |
64000 |
150 |
239 |
| Dg38 |
38×38×1.4 |
115 |
0.89 |
18220 |
98 |
220 |
| Dg50 |
50×50×1.5 |
93 |
0.90 |
8000 |
74 |
127 |
| Dg76 |
76×76×2.6 |
73.2 |
0.92 |
2270 |
71 |
94 |
Alpha Pall ring Spec.(PP)
| Model NO. |
Spec. D×H×δ
mm |
Specific surface α
m2/m3 |
Void ratio ε
% |
Piling NO. n
m-3 |
Piling Weight γρ
kg/m3 |
| A50-6PP |
57×51×1.2 |
90 |
0.94 |
6035 |
49.5 |
| A90-7PP |
88×66×1.2 |
76 |
0.96 |
1957 |
33.3 |
| A90-8PP |
88×88×1.2 |
70 |
0.91 |
1614 |
54 |
Pall ring
Pall ring is one of the most common used and well known tower packing, it is an industry standard design media developed
from Raschig ring, and it is used widely in varieties of applications.
Pall ring had good advantages:
1. Lower pressure drop
2.Good liquid/gas distribution and higher mass transfer efficiency
3.Versatility, easily wettable, high resistance to fouling, high temeperature
4.High mechanical strength, suitable for deeper beds
Comparison of Pressure Drop and contact area for countercurrent Absorber packing
|
Size
|
Packing material
|
Surface Area ft2/ft3
Ft2/ft3
|
Pressure Drop
In W.C. pr ft of packing
|
|
|
Munters 12060
|
68
|
0.13
|
|
1”
|
Koch Flexirings
|
65
|
0.90
|
|
1”
|
Glitsch Ballast Saddles
|
65
|
0.80
|
|
1”
|
Glitsch Ballast rings
|
65
|
1.30
|
|
1”
|
Intalox Saddles
|
63
|
0.75
|
|
1”
|
Norton Pall rings
|
63
|
0.90
|
|
1”
|
Ceilcoat Tellerette
|
55
|
0.65
|
|
2”
|
Maspak FN-200
|
43
|
0.75
|
|
1-1/2”
|
Rashig rings
|
40
|
1.60
|
|
1-1/2”
|
Glitsch Ballast rings
|
40
|
0.84
|
|
1-1/2”
|
Koch Flexirings
|
40
|
0.75
|
|
1-1/2”
|
Norton Pall rings
|
39
|
0.75
|
|
2-1/2”
|
Protak P-251
|
39
|
1.00
|
|
2”
|
Ceilcoat Tellerette
|
38
|
0.30
|
|
2”
|
Koch Flexirings
|
35
|
0.45
|
|
2”
|
Protak P-252
|
34
|
0.82
|
|
2”
|
Croll Reynolds Spiral Pak
|
34
|
0.24
|
|
2”
|
Glitsch Ballast Saddles
|
33
|
0.55
|
|
2”
|
Norton Pall rings
|
32
|
0.45
|
|
2”
|
Heilex 200
|
31
|
0.45
|
|
3”
|
Tellerettes
|
30
|
0.24
|
|
2”
|
Rashig rings
|
30
|
1.40
|
|
3-1/2”
|
Koch Flexirings
|
28
|
0.22
|
|
3”
|
Glitsch ballast saddles
|
28
|
0.32
|
|
3”
|
Intalox saddles
|
27
|
0.30
|
|
3-1/2”
|
Norton pall rings
|
26
|
0.22
|
|
3-1/2”
|
Glitsch Ballast rings
|
26
|
0.22
|
|
3-3/4”
|
Maspak FN 90
|
25
|
0.36
|
|
3”
|
Heilex 300
|
23
|
0.27
|
Applicatoins for Pall ring:
Aeration
Degassing
Desorption
Distillation
Stripping
Heat recovery
extraction etc
Types of packings
The Chief Requirements of a packing are that is should:
1.Expose a large surface area, example: to provide a high gas-liquid interfacial area.
2.Sport an open structure so as to put up low resistance to gas flow.
3.promote uniform wetting of packing, example, even distribution of liquid of packing surface.
4.Promote uniform gas flow across the bed cross section, example, no channelling.
In order to ensure these four goals, packings have undergone radical changes in their shapes and design pattern over the decades, many diverses types and shapes of packing have been developed.
However, they can be divided into two broad classes:
Stacked packing, which are regular arrangments of the packing elements, are mainly recommended for high gas rates and low pressure drop requirements.
Random packings are most commonly used. Raschig rings, Pall rings, Berl saddles, intalox saddles are the principal types of random packings.
T.C.I Pall ring is Similar to: glitsch,koch glitsch,lanpac and sulzer Pall ring
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