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Coupling & Gaskets
 
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Coupling & Gaskets Introduction
Coupling & Gaskets
The couplings designed for use with our glass process plant and pipeline components are of major importance from two main points of view.
     
  They must ensure that the bolt load applied to the joint is sufficient to make an effective seal whilst not inducing undue stress in the glass.
  They must be totally reliable in all service conditions on the inner walls.
     
This chapter of the catalogue covers not only the necessary couplings to join glass equipments and pipeline components together but also the couplings needed to join glass to another materials. For glass plants installed in relatively corrosive environments and added advantage is the availability of couplings constructed form various materials including stainless steel and plastic.
 
COMPLETE COUPLINGS
Complete Couplings
DN Flanges Inserts Nuts & blots Cat. Ref.
25 2xCF1 2xCN1 3x5/16¡±x70 SCT1
40 2xCF1.5 2xCN1.5 3x5/16¡±x80 SCT1.5
50 2xCF2 2xCN2 3x5/16¡±x90 SCT2
80 2xCF3 2xCN3 6x5/16¡±x100 SCT3
100 2xCF4 2xCN4 6x5/16¡±x110 SCT4
150 2xCF6
2xCN6 6x3/8¡±x120 SCT6
225 2xCF9 2xCN9 8x3/8¡±x130 SCT9
300 2xCF12
2xCN12 12x3/8¡±x140 SCT12
450 2xCF450 2xCN450 12x1/2¡±x200 SCT 18
600 2xCF600 2xCN600 12x1/2¡±x200 SCT 24
Complete coupling consists of two flanges, two inserts and the appropriate number of nuts, bolts, PTFE 'O' ring.
Generally flanges are made of cast iron powder coated / SS, nuts, bolts, springs
 
QUICK RELEASE COUPLINGS
Quick release coupling are used in applications where there is need to open or to close couplings as quickly without using tools. Charging materials to reaction or extraction vessels or replacing measurement indicators are typical examples of this.

Upper flange with slotted bolt -holes, hinged quick release bolts and a lower backing flange, which is fixed on the glass and are separated by means of hinged quick release bolts and wing nuts. Depending upon the frequency of opening.
BACKING FLANGES
BACKING FLANGES
DN D H P.C.D D x N TYPE CAT. REF
25 90 10 70 9 x 3 A SCF 1
40 105 10 86 9 x 3 A SCF 1.5
50 120 11 98 9 x 3 A SCF 2
80 155 12 133 9 x 6 A SCF 3
100 200 14 178 9 x 6 A SCF 4
150 280 15 254 11 x 6 A SCF 6
225 335 29 310 11 x 8 B SCF 9
300 420 35 394 11 x 12 B SCF 12
400 525 22 495 12 x 12 A SCF 16
450 630 38 585 14 x 12 B SCF 18
600 745 48 710 14 x 12 B SCF 24
Backing flanges form an internal part of the complete coupling detailed earlier in this chapter. Up to and including DN 450 they are one -piece unit and for DN-600 it is available in two pieces. Backing flanges are used to couple to glass end or to a bellow.

Backing flanges are made of cast iron and are used with inserts.

* Stainless steel (S.S.) flanges can be made on request basis.
 
Note : H may vary ± 2mm up to DN 150 and ± 3mm from Dn 200 to Dn 600mm
INSERTS
INSERTS
DN D D1 H TYPE CAT. REF
25 50 36 8 A SCN 1
40 65 50 8 A SCN 1.5
50 79 62 8 A SCN 2
80 110 92 8 A SCN 3
100 146 122 8 A SCN 4
150 197 174 10 A SCN 6
225 275 240 10 A SCN 9
300 359 322 10 A SCN 12
400 474 431 12 A SCN 16
450 555 500 18 A SCN 18
Spilt ring type insert are used with backing flanges. This are made of cast iron asbestos rope. Non asbestos PTFE impregnated rope cab be supplied on request. Insert from ruber material can also be supplied on request.
 
Note : H may vary ± 2mm up to DN 150 and ± 3mm from Dn 200 to Dn 600mm
DN is the nominal size of the coupling.
 
ADAPTOR BACKING FLANGE
These flanges are made of cast iron and are supplied with a spilt ring.

Aluminum flanges can also be supplied on request. Please mention Cat.Ref. SCFA for cast iron and SACFA for aluminum flanges.

Adaptor backing flanges are generally supplied undrilled . However , if specified , these can be supplied drilled as per "Table E" ,"Table F" and "ASA 150" standards.
UNDRILLING FLANGES
UNDRILLING FLANGES
DN D D1 D2 H CAT. REF
25 115 43 51 10 SCFA 1
40 150 58 66 10 SCFA 1.5
50 165 70 81 12 SCFA 2
80 200 101 112 12 SCFA 3
100 220 134 148 12 SCFA 4
150 285 186 196 15 SCFA 6
225 395 260 282 15 SCFA9
 
Drilled to Table E Drilled to Table F Drilled to ASA 150
CAT. REF. PCD n x dØ
SCFA 1/E 82 4 x 12Ø
SCFA 1.5/E 98 4 x 12Ø
SCFA 2/E 114 4 x 16Ø
SCFA 3/E 146 4 x 16Ø
SCFA 4/E 178 8 x 16Ø
SCFA 6/E 235 8 x 19Ø
SCFA 9/E 324 12 x 19Ø
CAT. REF. PCD n x dØ
SCFA 1/F 87 4 x 16Ø
SCFA 1.5/F 105 4 x 16Ø
SCFA 2/F 127 4x 16Ø
SCFA 3/ F 165 8x 16Ø
SCFA 4/F 190 8 x 16Ø
SCFA 6/F 260 12x 19Ø
SCFA 9/F 356 12 x 23Ø
CAT. REF. PCD n x dØ
SCFA 1/A 79 4 x 12Ø
SCFA 1.5/A 98 4 x 12Ø
SCFA 2/A 121 4 x 16Ø
SCFA 3/A 152 4 x 16Ø
SCFA 4/A 190 8 x 16Ø
SCFA 6/A 241 8 x 19Ø
SCFA 9/A 298 8 x 19Ø
BELLOW FLANGES
BELLOW FLANGES
DN D D1 D2 PCD d X N H CAT. REF
25 90 44 54 70 9 x 3 8 SBF 1
40 105 59 66 86 9 x 3 9 SBF 1.5
50 121 71 80 98 9 x 3 10 SBF 2
80 155 102 115 133 9 x 6 10 SBF 3
100 200 135 146 178 9 x 6 10 SBF 4
150 274 186 202 254 10 x 6 10 SBF 6
225 340 260 275 310 10 x 8 11 SBF 9
These flanges are made of cast iron and supplied with a spilt ring.

Aluminum flanges can also be supplied on request. Please mention Cat.Ref. SBF for cast iron and SABF for aluminum flanges.
DN is the nominal size of coupling
 
ADAPTOR BELLOW FLANGES
These flanges are made of cast iron and supplied with a spilt ring.

Aluminum flanges can also be supplied on request. Please mention Cat. Ref. SBFA for cast iron and SABFA for aluminum flanges.

Adaptor bellow flanges are generally supplied undrilled . However , if specified, these can be supplied drilled as per "Table E" ,"Table F" and "ASA 150" standards.
 
UNDRILLING FLANGES
UNDRILLING FLANGES
DN D D1 D2 H CAT. REF
25 115 44 53 7 SBFA 1
40 150 59 65 9 SBFA 1.5
50 165 70 81 8 SBFA 2
80 200 104 115 9 SBFA3
100 220 133 149 9 SBFA 4
150 285
189 204 11 SBFA 6
225 395 261 280 12 SBFA9
 
Drilled to Table E Drilled to Table F Drilled to ASA 150
CAT. REF. PCD n x dØ
SBFA 1/E 82 4 x 12Ø
SBFA 1.5/E 98 4 x 12Ø
SBFA 2/E 114 4 x 16Ø
SBFA 3/E 146 4 x 16Ø
SBFA 4/E 178 8 x 16Ø
SBFA 6/E 235 8 x 19Ø
SBFA 9/E 324 12 x 19Ø
CAT. REF. PCD n x dØ
SBFA 1/F 87 4 x 16Ø
SBFA 1.5/F 105 4 x 16Ø
SBFA 2/F 127 4x 16Ø
SBFA 3/ F 165 8x 16Ø
SBFA 4/F 190 8 x 16Ø
SBFA 6/F 260 12x 19Ø
SBFA 9/F 356 12 x 23Ø
CAT. REF. PCD n x dØ
SBFA 1/A 79 4 x 12Ø
SBFA 1.5/A 98 4 x 12Ø
SBFA 2/A 121 4 x 16Ø
SBFA 3/A 152 4 x 16Ø
SBFA 4/A 190 8 x 16Ø
SBFA 6/A 241 8 x 19Ø
SBFA 9/A 298 8 x 19Ø
COMPRESSION SPRINGS
COMPRESSION SPRINGS
DN FREE L INSTALLED L1 CAT. REF.
25 -100 14.5 11.0 SDF 8.5
150 - 300 22.0 18.0 SDF 10.5
Compression rings are used to set and maintain the correct bolts load on standard glass couplings.

Standard compression springs have a corrison resistant coating and are also available in SS.
PTFE 'O' RINGS
PTFE 'O' rings are the most widely used gaskets in glass fittings. These are provided with a locking collar, which help to lock the two glass surface correctly. They are manufactured from quality grade of PTFE.
DN D D1 d L CAT. REF
25 115 43 51 10 STR1
40 150 58 66 10 STR1.5
50 165 70 81 12 STR 2
80 200 101 112 12 STR 3
100 220 134 148 12 STR 4
150 285
186 196 15 STR 6
225 395 260 282 15 STR9
300 342 318 4 7 STR 12
450 537 490 6 7 STR 18
PTEF SHEATED GASKETS
DN CAT . REF.
25 STMP 1
40 STMP 1.5
50 STMP 2
80 STMP 3
100 STMP 4
150 STMP 6
225 STMP 9
300 STMP 12
450 STMP 18
These gaskets take form of a PTFE sheath fitted over a compressed asbestos fiber gaskets. When using this type of gasket, a higher bolting force is required for DN 450 and above.

Please consult our Technical Department for further information.
 
PTFE bellows are an important aid in the construction of glass plant and pipeline.

They can be used to compensate for different thermal movement between glass and associated equipment, absorb vibrations from associated equipment or foundations. In particular, bellows can be used for connecting glass to other materials. When bellows are used, the support and restraint of the glass should be such that the force resulting from pressure/vacuum in the pipeline and forces resulting from Pressure /vacuum in the pipeline and forces resulting from movement of the bellows do not result in undue stresses in the glass. The maximum operating temperature for PTFE bellows is 180°C. Bellows DN 80 and above should not be used under vacuum.
PTEF SHEATED GASKETS
DN 20°C 100°C 160°C 200°C
15 -1/+4 -1/+3 -1/+ 1.5  
25 -1/+4 -1/+3 -1/+ 1.5  
40 -1/+4 -1/+3 -1/+ 1.5  
50 -1/+4 -1/+2 -1/+1 Unpressurised
80 -1/+3 -1/+2 -1/+1  
100 -1/+2 -1/+2 -1/+1  
150 -1/+2 -1/+ 1.5 -1/+ 0,7  
200 -1/+1 -1/+1 -1/+ 0,5  
Permissible operating conditions for SBFN bellows
Permissible operating pressure (bar g)
PTFE BELLOWS
GLASS TO GLASS (LINE BELLOW)
PTFE BELLOWS
DN D D1 D2 L CAT. REF
25 90 41 31 60 SFBN 1
40 105 56 43 60 SFBN 1.5
50 121 69 55 60 SFBN 2
80 155 98 82 65 SFBN 3
100 200 132 111 65 SFBN 4
150 274 184 162 65 SFBN 6
225 340 258 230 65 SFBN 9
PTFE BELLOWS GLASS TO
OTHER MATERIALS ( LINE BELLOW)
PTFE BELLOWS GLASS TO
DN D D1 D2 L CAT. REF
25 90 41 31 60 SFBF 1
40 105 56 43 60 SFBF 1.5
50 121 69 55 60 SFBF 2
80 155 98 82 65 SFBF 3
100 200 132 111 65 SFBF 4
150 274 184 162 65 SFBF 6
225 340 258 230 65 SFBN 9
PTFE VACUUM BELLOWS
GLASS TO GLASS (VACUUM BELLOW)
PTFE VACUUM BELLOWS
DN D D1 D2 L L1 CAT. REF
80 155 98 82 70 5 SVBN 3
100 200 132 111 70 5 SVBN 4
150 274 184 162 70 5 SVBN 6
225 340 258 230 70 5 SVBN 9
 
PTFE VACUUM BELLOWS
GLASS TO OTHER MATERIALS (VACUUM BELLOW)
PTFE VACUUM BELLOWS
DN D D1 D2 L L1 CAT. REF
80 155 98 82 70 5 SVBF 3
100 200 132 111 70 5 SVBF 4
150 274 184 162 70 5 SVBF 6
225 350 258 230 70 5 SVBF 9
300 425 340 308 70 5 SVBF 12
 
Bellows can be supplied with undrilled adaptor flanges. However , if specified , these can be supplied drilled as per "Table E", "Table F" and "ASA 150" standards.
Tolerances for above bellows in length is ±3mm and diameter as per glass buttress
ADAPTOR PLATE FOR REACTORS
ADAPTOR PLATE FOR REACTORS
DN DN1 DN2 L CAT. REF
25 25 60 10 SEMP 1
40 37 80 10 SEMP 1.5
50 50 100 10 SEMP 2
80 75 120 12 SEMP 3
100 100 155 12 SEMP 4
150 150 210 12 SEMP 6
225 200 260 15 SEMP 9
These components are used as interface spacers when connecting glass flat buttress end components to other process plant and pipeline equipment and glass - lined reaction vessels. A combination of steel, rubber and PTFE provide an ideal sealing surface with only PTFE coming into contact with the process fluids to maintain resistance to corrosion.
 
PTFE Bellows
PTFE bellows are an important aid in the construction of glass plant and pipeline. They can be used to compensate for different thermal movement between glass and associated equipment, absorb vibrations from associated equipment or foundations. In particular, bellows can be used for connecting glass to other materials. When bellows are used, the support and restraint of the glass should be such that the force resulting from pressure/vacuum in the pipeline and forces resulting from Pressure/vacuum in the pipeline and forces resulting from movement of the bellows do not result in undue stresses in the glass. If any doubt, please consult our Technical Department.
All bellows are delivered complete with an appropriate flange assembly as detailed in the diagram and tables. It is essential that the limiting screws are not removed.
The maximum operating temperature for PTFE bellows is 200¡ÆC. Bellows ON 80 and above should not be used under vacuum. For such application we recommend the use of vacuum bellows as detailed on the following page.
PTFE Bellows for connecting Glass to Glass
PTFE Bellows for connecting Glass to Glass
DN La Lb Max. operating pressure
up to 100¡Æ C (bar.g)
Cat. Ref.
25 45 60 3 SFBN 1
40 50 60 3 SFBN 1.5
50 50 60 2 SFBN 2
80 65 65 2 SFBN 3
100 70 65 2 SFBN 4
150 70 65 1.5 SFBN 6
225 70 70 1 SFBN 9
300 70 70 0.7 SFBN 12
La = As per international standards.
Lb = As per our standards.
Tolerance ¡¾ 3mm
PTFE Bellows for Connecting Glass to Other Materials
PTFE Bellows for Connecting Glass to Other Materials
DN D La Lb Max. operating pressure
up to 100¡Æ C (bar.g)
Cat. Ref.
25 115 45 60 3 SFBF 1
40 150 50 60 3 SFBF 1.5
50 165 50 60 2 SFBF 2
80 200 65 65 2 SFBF 3
100 220 70 65 2 SFBF 4
150 285 70 65 1.5 SFBF 6
225 395 70 70 1 SFBF 9
300 480 70 70 0.7 SFBF 12
La = As per international standards.
Lb = As per our standards.
Tolerance ¡¾ 3mm
The adaptor flange in this assembly is drilled to suit mating flanges as per "Table E", "Table F", "Table D","ASA 150", if specified.

Bellows can be supplied with undrilled adaptor flanges.