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                  Teflon PTFE series
                  Expanded PTFE sealant joint
                  PTFE Tubing(Fine power)
                  PTFE Diaphragm
                  PTFE o-ring
                  PTFE envelope non-asbestos
                  PTFE sheet/rod
                  FEP envelope Viton O-ring
                  PFA Tubing
                  Gland Packing series
                  PTFE packing
                  PTFE Graphite packing
                  Carbon fiber packing
                  Flexible graphite packing
                  Aramid fiber packing
                  Acrylic Nitrile (PAN) packing
                  PTFE Muti-Filament packing
                  Asbestos packing with PTFE
                  Gasket series
                  Spiral wound gaskets
                  Ring joint gaskets
                  Lens gaskets
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                  Double jacket graphite gasket
                  Plastic products
                  Die formed graphite ring
                  Sealing sheet series
                  Expanded Graphite sheet
                  Non-asbestos sheet
                  Tanged/foil graphite sheet
                  Rubber (EPDM,NBR) sheet
                  Fiber glass cloth
                  Ceramic fiber cloth
                  Cork sheet
                  Wool felt sheet
                  Tower packing
                  Pall ring
                  Tellerette packing
                  Muti-surface hollow ball
                  PP ball
                  Rashing ring
                  Plastic ripple padding
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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.
                  Please feel free to send us comments, request technical information or email us.
                  Your comments and feedback are important to us.
                    You are in : Home>>Products>>Tower packing>>Rashing ring
                     
                   

                   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


                  Table-1 Chemical composition:
                   

                  Sio2

                  AL2O3

                  Fe2O3

                  CaO

                  MgO

                  K2O+Na2O

                  Other

                  >73%

                  17-23%

                  <1.0%

                  <0.5%

                  <0.5%

                  2-4%

                  <0.1%

                   
                  Table-2 Physical properties:
                   

                  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℃

                  Porosity(%)

                  <1

                  Moh’s hardness(scale)

                  >6.5

                  Thermal Conductivity(w/m.k)

                  0.9-1.0

                  Specific heat (j/kg ℃)

                  850-900

                   

                  Table-3 Dimension for saddles ,as follows:

                   

                  Normal Size

                  Diameter of Deck(mm)

                  Outside Diameter(mm)

                  Height(mm)

                  Wall thickness(mm)

                  Width(mm)

                  1/2

                  12mm

                  12±1.0

                  20±1.4

                  10±1.0

                  2.0±0.45

                  10±2.0

                  5/8

                  16mm

                  16±1.0

                  24±1.5

                  12±1.0

                  2.0±0.5

                  12±2.0

                  3/4

                  19mm

                  19±1.5

                  28±2.0

                  14±1.0

                  2.5±0.5

                  14±2.0

                  1

                  25mm

                  25±1.5

                  38±2.0

                  19±1.0

                  3.0±0.5

                  20±2.0

                  1.5

                  38mm

                  38±2.0

                  60±3.0

                  30±1.5

                  4.0±1.0

                  30±2.5

                  2

                  50mm

                  50±2.5

                  80±4.0

                  40±2.0

                  5.0±1.0

                  40±3.0

                  3

                  76mm

                  76±4.0

                  114±4.0

                  57±3.0

                  9.0±1.0

                  57±4.0

                   
                  Ceramic saddles for RTO
                  These saddles are mostly used as heat transfer media and are higher density and require good high temperature resistance.
                   

                  Table-1 chemical composition

                  SiO2

                  Al2O3

                  Fe2O3

                  Cao

                  K2O+Na2O

                  >70%

                  23-30%

                  <1%

                  1-2%

                  2-4%

                  Table-2 physical property

                  INDEX

                  VALUE

                  Specific gravity

                  2.2-2.4

                  Water absorption,%

                  <0.5

                  Acid-resisting strength,%Wt.Loss

                  <4

                  Firing temperature,℃

                  1280-1320

                  Softening point, ℃

                  >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

                   

                   

                  3/4

                  688

                  102

                  334

                   

                   

                  1

                  688

                  77

                  253

                   

                   

                  1.5

                  640

                  50

                  164

                   

                   

                  2

                  577

                  35

                  115

                   

                   

                  3

                  623

                  28

                  92

                  75.5

                  24

                  Table-3 Specification of saddles

                  Normal size

                  Diameter of Neck D

                  Outside Diameter L

                  Height H

                  Wall hickness T

                  WidthW

                  1/2

                  12mm

                  12±1.0

                  20±1.4

                  10±1.0

                  2.0±0.45

                  10±2.0

                  5/8

                  16mm

                  16±1.0

                  24±1.5

                  12±1.0

                  2.0±0.5

                  12±2.0

                  3/4

                  19mm

                  19±1.5

                  28±2.0

                  14±1.0

                  2.5±0.5

                  14±2.0

                  1

                  25mm

                  25±1.5

                  38±2.0

                  19±1.0

                  3.0±0.5

                  20±2.0

                  1.5

                  38mm

                  38±2.0

                  6.0±3.0

                  30±1.5

                  4.0±1.0

                  30±2.5

                  2

                  50mm

                  50±2.5

                  80±4.0

                  40±2.0

                  5.0±1.0

                  40±3.0

                  3

                  76mm

                  76±4.0

                  114±4.0

                  57±3.0

                  9.0±1.0

                  57±4.0

                  These saddles have excellent resistance to acids except in the case of hydrofluoric acid.The saddles softening point is 1400℃ min,and they show good thermal shock resistance during repeated cycling between 20 and 820 ℃.Thermal shock test of ceramic saddle for RTO.
                  For example shipping the saddles over 80m3:
                  ▲ Randomly pick 100-200 pieces of addles from the batch or shipment
                  ▲ For each sample selected,heat it up to and maintain them at this temperature for 30 minutes
                  ▲ Drop the hot pieces into cold 20 ℃ water
                  ▲ Repeat steps two(2) and three(3)ten times on each and every piece in the sample lot.
                  ▲ 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

                  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%

                  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

                  1280 to 1320

                  Softening point

                  >1400

                  Density

                  Kg/m3

                  2300-2400

                  Water absorption

                  %

                  <0.2

                  Thermal Expansion

                  10-6mm/mm ℃

                  4.7

                  Hardness

                  Mohr Scale

                  7-8

                  Comprehensive strength

                  Newtons

                  5600

                  Shock strength

                  Kgf.cm/cm3

                  1.0-1.5

                  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

                  -

                  -

                  Ceramic Super saddles
                  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)

                  Φ6

                  6*6*2

                  789

                  0.73

                  3110000

                  737

                  2030

                  Φ10

                  10*10*2

                  440

                  0.70

                  720000

                  700

                  1280

                  Φ15

                  15*15*2

                  330

                  0.70

                  250000

                  690

                  960

                  Φ16

                  16*16*2

                  305

                  0.73

                  192500

                  730

                  784

                  Φ25

                  25*25*2.5

                  190

                  0.78

                  50000

                  580

                  400

                  Φ35

                  35*35*4

                  150

                  0.76

                  18500

                  581

                  320

                  Φ40

                  40*40*5

                  126

                  0.75

                  13200

                  580

                  305

                  Φ50

                  50*50*5

                  93

                  0.81

                  6400

                  528

                  177

                  Φ80

                  80*80*9.5

                  90

                  0.68

                  1950

                  500

                  234

                  Φ100

                  100*100*10

                  70

                  0.70

                  1000

                  700

                  172

                  Φ150

                  150*150*15

                  50

                  0.68

                  295

                  790

                  142

                  Ceramic cross-partition Ring
                  Technical data

                  Specifications
                  (mm)

                  OD*ID*H*Q
                  (mm)

                  SpecificS
                  urfacearea
                  (m2/m3)

                  VoidVolume
                  (m3/m3)

                  BulkNumber
                  (n/m3)

                  BulkDensity
                  (kg/m3)

                  Dry packing
                  (factorm-1)

                  Φ50

                  50*40*50*5

                  145

                  0.50

                  6400

                  600

                  565

                  Φ80

                  80*64*80*8

                  120

                  0.56

                  1950

                  820

                  356

                  Φ100

                  100*80*100*10

                  110

                  0.53

                  1000

                  850

                  252

                  Φ120

                  120*96*120*12

                  75

                  0.55

                  370

                  860

                  146

                  Φ150

                  150*120*150*15

                  60

                  0.58

                  295

                  980

                  101

                  Pall rings
                  Ceramic pall rings

                  Specifications
                  (mm)

                  OD*ID*H*Q
                  (mm)

                  SpecificS
                  urfacearea
                  (m2/m3)

                  VoidVolume
                  (m3/m3)

                  BulkNumber
                  (n/m3)

                  BulkDensity
                  (kg/m3)

                  Dry packing
                  (factorm-1)

                  Φ25

                  25*25*3.0

                  220

                  0.75

                  50000

                  600

                  565

                  Φ38

                  38*38*4

                  150

                  0.78

                  13400

                  540

                  356

                  Φ50

                  50*50*5

                  120

                  0.78

                  6400

                  555

                  252

                  Φ80

                  80*80*8

                  75

                  0.80

                  1950

                  520

                  146

                   

                  Cascade cascade-mini Rings

                  Our Size
                  (mm)

                  D*H*T
                  (mm)

                  Specific Surface
                  (m2/m3)

                  Void volume
                  (m3/m3)

                  Bulk density
                  (n/m3)

                  Package density
                  (kg/m3)

                  Φ25

                  25*20*3

                  270

                  0.74

                  74000

                  624

                  Φ50

                  50*30*5

                  108.8

                  0.787

                  9091

                  516

                  Φ76

                  76*45*7

                  63.4

                  0.795

                  2517

                  426

                     
                   
                  Contact Information
                  Company:

                  Cixi Dongfeng Sealing & packing co., Ltd

                  Address: No.225,Jinsha Road,Cixi city,NingboChina
                  P.C: 315300
                  Tel: 86-574-63225670,63225671,63225672,63226625
                  Fax: 86-574-63226688
                  Url: www.d5delica.com
                  E-mail: sales@chinaptfe.com
                  xiaojun@chinaptfe.com

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