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WELCOME to Cixi Dongfeng Sealing&packing web site.
Here you will find information on many different types of sealing gaskets, packings and materials which are in common used in oil chemical, metallurgy, electric power, ship-building, paper making and fertilizer industries today.
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You are in : Home>>Products>>Tower packing>>Rashing ring |
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¡¡Rashing ring (Random packing) |
 Ceramic random(tower)packings
Ceramic packings have excellent acid resistance and heat resistance .Them can resist to corrosion of various inorganic acids,organic acids and organic solvents except hydrofluoric acid ,and can be used in high or low temperature conditions.consequently their application ranges are very wide.The packings can be used in the drying columns,absorbing columns,cooling towers,scrubbing towers in chemical industry,metallurgy industry,coal gas industry,oxygen producing industry,etc.
Ceramic saddles
Ceramic saddles for chemical and petrochemical
Application of saddles
Saddles are used in two main fields but have different properties depending on the application.One fields is the chemical and petrochemical industries and another is in environmental ares such as RTO equipment.Data of Saddles for Chemical and Petrochemical
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| Table-1 Chemical composition: |
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Sio2 |
AL2O3 |
Fe2O3 |
CaO |
MgO |
K2O+Na2O |
Other |
>73% |
17-23% |
<1.0% |
<0.5% |
<0.5% |
2-4% |
<0.1% |
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| Table-2 Physical properties: |
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Nominal size |
1/2 |
5/8 |
3/4 |
1 |
1.5 |
2 |
3 |
12mm |
16mm |
19mm |
25mm |
38mm |
50mm |
76mm |
Number per m3 |
610,000 |
269,000 |
146,000 |
59,000 |
19,680 |
8,243 |
2,400 |
Package density(kg/ m3) |
780 |
700 |
670 |
630 |
580 |
550 |
530 |
Free volume(%) |
68 |
71 |
75 |
77 |
80 |
79 |
75 |
Surface area(m2 /m3 ) |
647 |
535 |
350 |
254 |
180 |
120 |
91 |
Specific gravity(g/ m3) |
2.3 |
Water absorption(%) |
0.3 |
Acid resistance(%) |
>99.6 |
Max operating temp |
1100¡æ |
Porosity(%) |
<1 |
Moh¡¯s hardness(scale) |
>6.5 |
Thermal Conductivity(w/m.k) |
0.9-1.0 |
Specific heat (j/kg ¡æ) |
850-900 |
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Table-3 Dimension for saddles ,as follows: |
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Normal Size |
Diameter of Deck(mm) |
Outside Diameter(mm) |
Height(mm) |
Wall thickness(mm) |
Width(mm) |
1/2 |
12mm |
12¡À1.0 |
20¡À1.4 |
10¡À1.0 |
2.0¡À0.45 |
10¡À2.0 |
5/8 |
16mm |
16¡À1.0 |
24¡À1.5 |
12¡À1.0 |
2.0¡À0.5 |
12¡À2.0 |
3/4 |
19mm |
19¡À1.5 |
28¡À2.0 |
14¡À1.0 |
2.5¡À0.5 |
14¡À2.0 |
1 |
25mm |
25¡À1.5 |
38¡À2.0 |
19¡À1.0 |
3.0¡À0.5 |
20¡À2.0 |
1.5 |
38mm |
38¡À2.0 |
60¡À3.0 |
30¡À1.5 |
4.0¡À1.0 |
30¡À2.5 |
2 |
50mm |
50¡À2.5 |
80¡À4.0 |
40¡À2.0 |
5.0¡À1.0 |
40¡À3.0 |
3 |
76mm |
76¡À4.0 |
114¡À4.0 |
57¡À3.0 |
9.0¡À1.0 |
57¡À4.0 |
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| Ceramic saddles for RTO |
 These saddles are mostly used as heat transfer media and are higher density and require good high temperature resistance. |
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Table-1 chemical composition |
SiO2 |
Al2O3 |
Fe2O3 |
Cao |
K2O+Na2O |
>70% |
23-30% |
<1% |
1-2% |
2-4% |
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| Table-2 physical property |
INDEX |
VALUE |
Specific gravity |
2.2-2.4 |
Water absorption,% |
<0.5 |
Acid-resisting strength,%Wt.Loss |
<4 |
Firing temperature,¡æ |
1280-1320 |
Softening point, ¡æ |
>1400 |
Density,kg/m3 |
2350 |
Normalsize |
Approx.weight
Kg/m3 |
Surface area |
Void fraction(%) |
Packing factor(1/ft) |
ft2/ft3 |
m2/ m3 |
1/2 |
720 |
190 |
623 |
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3/4 |
688 |
102 |
334 |
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1 |
688 |
77 |
253 |
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1.5 |
640 |
50 |
164 |
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2 |
577 |
35 |
115 |
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3 |
623 |
28 |
92 |
75.5 |
24 |
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| Table-3 Specification of saddles |
Normal size |
Diameter of Neck D |
Outside Diameter L |
Height H |
Wall hickness T |
WidthW |
1/2 |
12mm |
12¡À1.0 |
20¡À1.4 |
10¡À1.0 |
2.0¡À0.45 |
10¡À2.0 |
5/8 |
16mm |
16¡À1.0 |
24¡À1.5 |
12¡À1.0 |
2.0¡À0.5 |
12¡À2.0 |
3/4 |
19mm |
19¡À1.5 |
28¡À2.0 |
14¡À1.0 |
2.5¡À0.5 |
14¡À2.0 |
1 |
25mm |
25¡À1.5 |
38¡À2.0 |
19¡À1.0 |
3.0¡À0.5 |
20¡À2.0 |
1.5 |
38mm |
38¡À2.0 |
6.0¡À3.0 |
30¡À1.5 |
4.0¡À1.0 |
30¡À2.5 |
2 |
50mm |
50¡À2.5 |
80¡À4.0 |
40¡À2.0 |
5.0¡À1.0 |
40¡À3.0 |
3 |
76mm |
76¡À4.0 |
114¡À4.0 |
57¡À3.0 |
9.0¡À1.0 |
57¡À4.0 |
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These saddles have excellent resistance to acids except in the case of hydrofluoric acid.The saddles softening point is 1400¡æ min,and they show good thermal shock resistance during repeated cycling between 20 and 820 ¡æ.Thermal shock test of ceramic saddle for RTO.
For example shipping the saddles over 80m3:
¡ø Randomly pick 100-200 pieces of addles from the batch or shipment
¡ø For each sample selected,heat it up to and maintain them at this temperature for 30 minutes
¡ø Drop the hot pieces into cold 20 ¡æ water
¡ø Repeat steps two(2) and three(3)ten times on each and every piece in the sample lot.
¡ø Examine the pieces and count the percentage that show clear signs of breakage and /or cracking.Our standard is ¡°less¡±than eight(8%)percent. |
| Ceramic Super saddles |
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Chemical composition |
Composition |
Value |
Composition |
Value |
SiO2 |
>69% |
CaO |
<0.25% |
Al2O3 |
15-23% |
MgO |
<0.2% |
SiO2+Al2O3 |
>92% |
K2O+Na2O |
2-4% |
Fe2O3 |
<1% |
Other |
<1% |
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Physical properties |
Index |
Unit |
Value |
Porosity |
Vol% |
1 |
Specific heat |
KJ/Kg |
840-900 |
Crush strength |
N /mm2 |
390-420 |
Crush strength |
g/cm3 |
2.3-2.45 |
Acid Resistance |
% |
99.98 |
Firing temperature |
¡æ |
1280 to 1320 |
Softening point |
¡æ |
>1400 |
Density |
Kg/m3 |
2300-2400 |
Water absorption |
% |
<0.2 |
Thermal Expansion |
10-6mm/mm ¡æ |
4.7 |
Hardness |
Mohr Scale |
7-8 |
Comprehensive strength |
Newtons |
5600 |
Shock strength |
Kgf.cm/cm3 |
1.0-1.5 |
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| Geometric properties |
Normal size |
Approx.Weight |
Surface Area |
Void Fraction(%) |
Dry Packing factor(m-1) |
1b/ft3 |
Kg/m3 |
ft2/ft3 |
m2/m3 |
1 |
25mm |
40 |
645 |
79.5 |
260 |
77 |
570 |
1.5 |
38mm |
37.5 |
600 |
64 |
210 |
78 |
430 |
2 |
50mm |
35.6 |
570 |
42.8 |
140 |
79 |
277 |
3 |
76mm |
36 |
580 |
32 |
105 |
- |
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| Ceramic Super saddles |
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| Technical data of ceramic Raschig rings |
Specifications
(mm) |
D*H*Q
£¨mm£© |
Specific surface(m2/m3) |
VoidVolume
(m3/m3) |
BulkNumber
(n/m3) |
Bulk density
(kg/m3) |
Dry packing
(factorm-1) |
¦µ6 |
6*6*2 |
789 |
0.73 |
3110000 |
737 |
2030 |
¦µ10 |
10*10*2 |
440 |
0.70 |
720000 |
700 |
1280 |
¦µ15 |
15*15*2 |
330 |
0.70 |
250000 |
690 |
960 |
¦µ16 |
16*16*2 |
305 |
0.73 |
192500 |
730 |
784 |
¦µ25 |
25*25*2.5 |
190 |
0.78 |
50000 |
580 |
400 |
¦µ35 |
35*35*4 |
150 |
0.76 |
18500 |
581 |
320 |
¦µ40 |
40*40*5 |
126 |
0.75 |
13200 |
580 |
305 |
¦µ50 |
50*50*5 |
93 |
0.81 |
6400 |
528 |
177 |
¦µ80 |
80*80*9.5 |
90 |
0.68 |
1950 |
500 |
234 |
¦µ100 |
100*100*10 |
70 |
0.70 |
1000 |
700 |
172 |
¦µ150 |
150*150*15 |
50 |
0.68 |
295 |
790 |
142 |
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| Ceramic cross-partition Ring
Technical data |
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Specifications
(mm) |
OD*ID*H*Q
(mm) |
SpecificS
urfacearea
(m2/m3) |
VoidVolume
(m3/m3) |
BulkNumber
(n/m3) |
BulkDensity
(kg/m3) |
Dry packing
(factorm-1) |
¦µ50 |
50*40*50*5 |
145 |
0.50 |
6400 |
600 |
565 |
¦µ80 |
80*64*80*8 |
120 |
0.56 |
1950 |
820 |
356 |
¦µ100 |
100*80*100*10 |
110 |
0.53 |
1000 |
850 |
252 |
¦µ120 |
120*96*120*12 |
75 |
0.55 |
370 |
860 |
146 |
¦µ150 |
150*120*150*15 |
60 |
0.58 |
295 |
980 |
101 |
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Pall rings
Ceramic pall rings
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Specifications
(mm) |
OD*ID*H*Q
(mm) |
SpecificS
urfacearea
(m2/m3) |
VoidVolume
(m3/m3) |
BulkNumber
(n/m3) |
BulkDensity
(kg/m3) |
Dry packing
(factorm-1) |
¦µ25 |
25*25*3.0 |
220 |
0.75 |
50000 |
600 |
565 |
¦µ38 |
38*38*4 |
150 |
0.78 |
13400 |
540 |
356 |
¦µ50 |
50*50*5 |
120 |
0.78 |
6400 |
555 |
252 |
¦µ80 |
80*80*8 |
75 |
0.80 |
1950 |
520 |
146 |
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Cascade cascade-mini Rings |
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Our Size
(mm) |
D*H*T
(mm) |
Specific Surface
(m2/m3) |
Void volume
(m3/m3) |
Bulk density
(n/m3) |
Package density
(kg/m3) |
¦µ25 |
25*20*3 |
270 |
0.74 |
74000 |
624 |
¦µ50 |
50*30*5 |
108.8 |
0.787 |
9091 |
516 |
¦µ76 |
76*45*7 |
63.4 |
0.795 |
2517 |
426 |
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