Quality Is Our Passion Your Gasket Professionals SWG – Spiral Wound Gaskets date of:18.01.20210 | Rev.: 03 Gaskets depending on the design fulfill: • characteristic values according to EN 13555 • TA Luft according to VDI 2440 • BAM for oxygen applications
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ualit Is Our Passion SWG – Spiral Wound Gaskets...Spiral-wound gaskets are available in a wide range of material combinations with regard to the metal strip. If an inner ring is
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Quality Is Our Passion
Your Gasket Professionals
SWG – Spiral Wound Gaskets
date
of:1
8.01
.202
10 |
Rev.
: 03
Gaskets depending on the design fulfill:
• characteristic values according to EN 13555• TA Luft according to VDI 2440• BAM for oxygen applications
Quality Is Our Passion
Your Gasket Professionals
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21 |
Rev.
: 03
Spiral wound gaskets
Source: Sealing Vademecum
„Möller gaskets stand for highest quality at competitive prices. Our quality in spiral wound gaskets ensures reproducible sealing properties for you. This guarantees plant safety and availability“.
The spiral-wound gasket is one of the most commonly used metal/ soft-material gaskets. It consists of alternating metal coils and a soft, non-metallic filling. The inner and outer coils are made of metal to strengthen the spiral at the inner and outer diameter. This design, in combination with the special V-shape of the spiral metal strip and the properties of the filling material, makes the spiral wound gasket the ideal gasket for applications with high demands from pressure and temperature. The application in pipelines and apparatus has been proven successful for many decades in the chemical and petrochemical industries, in oil and gas extraction and the transport industries as well as in valves and pumps. Due to the V-shape of the metallic winding tape, the spiral-wound gasket is the only gasket with significant resilience, even after long periods of operation.Spiral wound gaskets are available in many different designs and material combinations. The four most common types are:
• without inner and outer ring type MMD-SWG for flanges with tongue and groove or as force shunt seal• with centering ring (CR) type MMD-SWG-CR-C/O according to EN 1514-2 and EN 12560-2 (application not recommended, it is better to use an
inner support ring to use)• with inner ring (IR) or support ring type MMD- SWG-IR, for male/ female flanges• with inner ring and centering ring type MMD-SWG-CR-C/I according to EN 1514-2 and EN 12560-2 for smooth flanges or flanges with sealing strips
• Optimal positioning and facilitating of the correct centering of the gasket• Increase of the radial stability and reduction of the „blow-out risk”• Reduction of yielding in PTFE spiral wound gaskets
• support of the inside of the spiral and thus protection against „buckling“ inwards and loss of function of the gasket is absolutely necessary with windings made of PTFE and graphite
• Turbulence of the medium is reduced by filling the inner gap between the flanges
Spiral-wound gaskets are available in a wide range of material combinations with regard to the metal strip. If an inner ring is used, the material of the inner ring is usually that of the metallic spiral strip. The most common materials of the filler strip are graphite and PTFE, but fillings of asbestos-free fibrous materials and mica are also common. The centering ring is either made of the same material as the inner ring and the metallic winding strip or made of a cheaper material, usually galvanized or powder-coated sheet steel. Depending on the combination of spiral and filling materials spiral-wound gaskets can be used at pressures of up to 200 bar and temperatures of up to 1000 °C. Characteristic values of various material combinations are shown on page 5.If no graphite can be used due to media incompatibility, or if media contamination by graphite is feared, it is possible to prevent this by using a spiral-wound gasket with EC zone. The use of this zone can prevent diffusion through the gasket or also serve to maintain the electrical conductivity of the insulating PTFE-windings (MMD-SWG-CR-IR-EC). The zones can be placed in the center or at the edges.Due to the gasket design, easy assembly and disassembly is guaranteed. Diameters over 1000 mm should be avoided, because of the sensitivity of the spiral windings during handling.
Designs
The centering ring offers the following advantages:
The marking is made near the outer edge with the following information: Manufacturer‘s mark DN PN Material designation Batch or batch designation
(number of the production lot)
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21 |
Rev.
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Spiral-wound gaskets with inner and outer ring
12
3
A
a
c
b
b+0.
6±0.
2
Ød4
Ød3
Ød2
Ød1
A
1 Inner ring | 2 Outer ring | 3 Sealing element (spiral strip + filler)
Materials and color code for gasket materials according to EN 1514-2, -4, -6, -7 and EN 12560-2, -6 with additions (common materials with material number in bold print)
Material 1)2) Material number
Material group DesignationColor codeEN15143)
HardnessHB
Temperature in °C Spec. weight g/cm3
min. max
Non-metallic material
Chrysotile-asbestos 4) ASB No stripes -60 550
PTFE / ePTFE PTFE White stripes -200 230
Mica(micaceous graphite)
Manufacturer designation
Pink stripes -40 900
More flexiblegraphite
F.G. Grey stripes -200 500
Ceramics 4) CERLight green stripes
-40 1.000
21
3
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Spiral-wound gaskets - properties | Limit values
Properties and dimensions (mm)
a Thickness of the inner/outer ring (information from suppliers)
4 ±0.23 ±0.22 ±0.2
Thickness of the lacquer layer 0.08 ±0.12
Thickness of the material for the spiral of the sealing element (information from suppliers) 0.2 ±0.015
Thickness of filler (graphite/PTFE) | (information from suppliers) 0.5 ±0.05
Width of graphite and mica strips (unwound) (information from suppliers)
4.5 ±0.156.0 ±0.158.5 ±0.159.0 ±0.15
Width of PTFE strip (unwound)(information from suppliers)
4.0 ±0.35.5 ±0.38.0 ±0.38.5 ±0.3
Width of the metal strip (unwound)(information from suppliers)
4.0 +0.17/-05.0 +0.17/-07.5 +0.17/-08.0 +0.17/-0
b Width of metallic spiral of the sealing element (profiled)
3.2 +0.3/-04.5 +0.3/-06.35+0.3/-07.2 +0.3/-0
c Soft material overhang 0.3 ± 0.1
Number of idle windings on the outer diameter of the sealing element 3 bis 5
Number of idle windings on the inner diameter of the sealing element 2 bis 3
Number of welds on the inner and outer diameter of the sealing element mind. 4
Limit values of material combinations for spiral wound gaskets
Dimensions in mma) Dimensions not suitable for slip-on and screwed flanges, consultation with manufacturer necessary
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Dimensions of the inner diameter of the inner ring according to EN 12560-2 for flanges according to EN 1759-1 (ASME B16.5) in Class 150, 300, 600, 900, 1500, 2500
Nominal width
Inner Ø of the gasket
Class
150 300 600 900 1500 2500
DN NPS mm mm mm mm mm mm
15a) 1/2 14.2
20a) 3/4 20.6
25a) 1 26.9
32a) 1 1/4 38.1 33.3
40a) 1 1/2 44.5 41.4
50 2 55.6 52.3
65 2 1/2 66.5 63.5
80 3 81.0 78.7
100 4 106.4 102.6 597.8
125 5 131.8 128.3 124.5
150 6 157.2 154.9 147.3
200 8 215.9 205.7 196.9
250 10 268.2 255.3 246.1
300 12 317.5 307.3 292.
350 14 349.3 342.9 320.8
400 16 400.0 389.9 374.7 368.3
450 18 449.3 438.2 425.5
500 20 500.1 489.0 482.6 476.3
600 24 603.3 590.6 590.6 577.9
a) Dimensions not suitable for slip-on and screwed flanges, consultation with manufacturer necessary
Spiral-wound gaskets for flanges according to ASME B16.5 and EN 1759-1
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Minimum pipe wall thickness for flanges according to DIN EN 1759-1 (ASME B16.5) in Class 150, 300, 600, 900, 1500, 2500 for the use of inner rings, according to EN 12560-2
Spiral-wound gaskets for flanges according to ASME B16.5 and EN 1759-1
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Maximum flange hole diameters
Maximum flange bore diameters for flanges according to EN 1759-1 (ASME B16.5) in Class 150, 300, 600, 900, 1500, 2500 for the use of spiral gaskets, according to EN 12560-2
Nominal width
Inner Ø of the gasket
Class
DN NPS 150 300 600 9001) 15001) 25001)
15a) 1/2
welding neck flanges (WN) 2)
none use flanges Class 1500
noneuse flanges Class 1500 2)
20a) 3/4
25a) 1
32a) 1 1/4 slip-on flanges (SO) 3)
welding neck flanges (WN) 2)40a) 1 1/2
50 2 slip-on flanges (SO) 3)
welding neck flanges (WN)independent of drilling65 2 1/2
80 3
slip-on flanges (SO)welding neck flanges (WN),independent of drilling
SO 3) and WN, independent of drilling
seeDN100 toDN300Class600
welding neck flanges (WN) with SW-bore (including longer projection, no slip-on flanges (SO)
100 4
welding neck flanges (WN) with Schedule 10S -bore according to ASME B36.19M, (including longer projection, no slip-on flanges (SO)
welding neck flanges (WN) with Schedule 10-bore to ASME B36.19M, (including longer pro-jection, no slip-on flanges (SO)
400 16
450 18
500 20
600 24
1) Inner rings are required for seals Class 900 DN 600; Class 1500 DN 300 to DN 600; Class 2500 DN 100 to DN 300, these rings may be used up to 1.52 mm into the tube under unfavorable combination of max. bore, eccentric mounting and additional tolerances
2) In these sizes the gasket is suitable for a welding neck flange with standard wall thickness and bore, if gasket and flanges are concentrically mounted. This also applies to longer projections. It is the responsibility of the user to decide whether the gasket is suitable for flanges with a larger bore can be used
3) In these flanges, gaskets are only suitable for concentric assembly
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Spiral-wound gaskets according to ASME B16.47 for Series A flanges
Dim
ensi
ons
for s
pira
l-wou
nd g
aske
ts a
ccor
ding
to A
SME
B16.
20 fo
r flan
ges
acco
rdin
g to
ASM
E B
16.4
7 Se
ries A
Clas
s 15
0Cl
ass
300
Clas
s 40
0Cl
ass
600
Clas
s 90
0
Nom
inal
w
idth
Dim
ensi
ons
of th
e se
alin
g el
emen
tCe
nter
ing
ring
Dim
ensi
ons
of th
e se
alin
g el
emen
tCe
nter
ing
ring
Dim
ensi
ons
of th
e se
alin
g el
emen
tCe
nter
ing
ring
Dim
ensi
ons
of th
e se
alin
g el
emen
tCe
nter
ing
ring
Dim
ensi
ons
of th
e se
alin
g el
emen
tCe
nter
ing
ring
NPS
Ø
inn
erd1
(1)
Ø O
uter
d2 (2
)Ø
Out
erd3
Ø i
nner
d1 (
1)Ø
Out
erd2
(2)
Ø O
uter
d3 (3
)Ø
inn
erd1
(1)
Ø O
uter
d2 (2
)Ø
Out
erd3
(3)
Ø i
nner
d1 (
1)Ø
Out
erd2
(2)
Ø O
uter
d3 (3
)Ø
inn
erd1
(1)
Ø O
uter
d2 (2
)Ø
Out
erd3
(3)
2667
3.1
704.
977
4.7
685.
873
6.6
835.
268
5.8
736.
683
1.9
685.
873
6.6
866.
968
5.8
736.
688
2.7
2872
3.9
755
.783
1.9
736.
678
7.4
898.
773
6.6
787.
489
2.3
736.
678
7.4
914.
473
6.6
787.
494
6.2
3077
4.7
806.
588
2.7
793.
884
4.6
952.
579
3.8
844.
694
6.2
793.
884
4.6
971.
679
3.8
844.
610
09.7
3282
5.5
860.
693
9.8
850.
990
1.7
1006
.685
0.9
901.
710
03.3
850.
990
1.7
1022
.485
0.9
901.
710
73.2
3487
6.3
911.
499
0.6
901.
795
2.5
1057
.490
1.7
952.
510
54.1
901.
795
2.5
1073
.290
1.7
952.
511
36.7
3692
7.1
968.
510
47.8
955.
810
06.6
1117
.695
5.8
1006
.611
17.6
955.
810
06.6
1130
.395
8.9
1009
.712
00.2
3897
7.9
1019
.311
11.3
977.
910
16.0
1054
.197
1.6
1022
.410
73.2
990.
610
41.4
1104
.910
35.1
1085
.912
00.2
4010
28.7
1070
.111
62.1
1022
.410
70.1
1114
.610
25.7
1076
.511
27.3
1047
.810
98.6
1155
.710
98.6
1149
.412
51.0
4210
79.5
1124
.012
19.2
1073
.211
20.9
1165
.410
76.5
1127
.311
78.1
1104
.911
55.7
1219
.211
49.4
1200
.213
01.8
4411
30.3
1178
.112
76.4
1130
.311
81.1
1219
.211
30.3
1181
.112
31.9
1162
.112
12.9
1270
.012
06.5
1257
.313
68.6
4611
81.1
1228
.913
27.2
1178
.112
28.9
1273
.311
93.8
1244
.612
89.1
1212
.912
63.7
1327
.212
70.0
1320
.814
35.1
4812
31.9
1279
.713
84.3
1235
.212
86.0
1324
.112
44.6
1295
.413
46.2
1270
.013
20.8
1390
.713
20.8
1371
.614
85.9
5012
82.7
1333
.514
35.1
1295
.413
46.2
1378
.012
95.4
1346
.214
03.4
1320
.813
71.6
1447
.8-
--
5213
33.5
1384
.314
92.3
1346
.213
97.0
1428
.813
46.2
1397
.014
54.2
1371
.614
22.4
1498
.6-
--
5413
84.3
1435
.115
49.4
1403
.414
54.2
1492
.314
03.4
1454
.215
17.7
1428
.814
79.6
1555
.8-
--
5614
35.1
1485
.916
06.6
1454
.215
05.0
1543
.114
54.2
1505
.015
68.5
1479
.615
30.4
1612
.9-
--
5814
85.9
1536
.716
63.7
1511
.315
62.1
1593
.915
05.0
1555
.816
19.3
1536
.715
87.5
1663
.7-
--
6015
36.7
1587
.517
14.5
1562
.116
12.9
1644
.715
68.5
1619
.316
82.8
1593
.916
44.7
1733
.6-
--
Dim
ensio
ns in
mm
(1) I
nner
dia
met
er (d
1) -
tole
ranc
e of
NPS
26-
34 ±
0.8
mm
, tol
eran
ce o
f NPS
36-
60 ±
1.3
mm
(2) O
uter
dia
met
er (d
2) -
tole
ranc
e of
from
NPS
26-
60 ±
1.5
mm
(3) O
uter
dia
met
er c
ente
ring
ring
(d3)
- to
lera
nce
± 0
.8 m
m(4
) The
re a
re n
o fla
nges
from
NPS
50
and
larg
er
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Spiral wound gaskets according to ASME B16.47 for flanges series B
Dim
ensio
ns fo
r spi
ral-w
ound
gas
kets
acc
ordi
ng to
ASM
E B1
6.20
for fl
ange
s ac
cord
ing
to A
SME
B 16
.47
Serie
s B
Clas
s 15
0Cl
ass
300
Clas
s 40
0Cl
ass
600
Clas
s 90
0
Nom
inal
w
idth
Dim
ensio
ns o
f the
se
alin
g el
emen
tCe
nter
ing
ring
Dim
ensio
ns o
f the
se
alin
g el
emen
tCe
nter
ing
ring
Dim
ensio
ns o
f the
se
alin
g el
emen
tCe
nter
ing
ring
Dim
ensio
ns o
f the
se
alin
g el
emen
tCe
nter
ing
ring
Dim
ensio
ns o
f the
se
alin
g el
emen
tCe
nter
ing
ring
NPS
Ø
inn
erd1
(1)
Ø O
uter
d2 (2
)Ø
Out
erd3
Ø i
nner
d1 (
1)Ø
Out
erd2
(2)
Ø O
uter
d3 (3
)Ø
inn
erd1
(1)
Ø O
uter
d2 (2
)Ø
Out
erd3
(3)
Ø i
nner
d1 (
1)Ø
Out
erd2
(2)
Ø O
uter
d3 (3
)Ø
inn
erd1
(1)
Ø O
uter
d2 (2
)Ø
Out
erd3
(3)
2667
3.1
698.
572
5.4
673.
171
1.2
771.
766
6.8
698.
574
6.3
663.
771
4.5
765.
369
2.2
749.
383
8.2
2872
3.9
749.
377
6.2
723.
976
2.0
825.
571
4.5
749.
380
0.1
704.
975
5.7
819.
274
3.0
800.
190
1.7
3077
4.7
800.
182
7.0
774.
781
2.8
886.
076
5.3
806.
585
7.3
778.
082
8.8
879.
680
6.5
857.
395
8.9
3282
5.5
850.
988
1.1
825.
586
3.6
939.
881
2.8
860.
691
1.4
831.
988
2.7
933.
586
3.6
914.
410
16.0
3487
6.3
908.
193
5.0
876.
391
4.4
993.
986
6.9
911.
496
2.2
889.
093
9.8
997.
092
0.8
971.
610
73.2
3692
7.1
958.
998
7.6
927.
196
5.2
1047
.891
7.7
965.
210
22.4
939.
899
0.6
1047
.894
6.2
997.
011
24.0
3897
4.9
1009
.710
44.7
1009
.710
47.8
1098
.697
1.6
1022
.410
73.2
990.
610
41.4
1104
.910
35.1
1085
.912
00.2
4010
22.4
1063
.810
95.5
1060
.510
98.6
1149
.410
25.7
1076
.511
27.3
1047
.810
98.6
1155
.710
98.6
1149
.412
51.0
4210
79.5
1114
.611
46.3
1111
.311
49.4
1200
.210
76.5
1127
.311
78.1
1104
.911
55.7
1219
.211
49.4
1200
.213
01.8
4411
24.0
1165
.411
97.1
1162
.112
00.2
1251
.011
30.3
1181
.112
31.9
1162
.112
12.9
1270
.012
06.5
1257
.313
68.6
4611
81.1
1224
.012
55.8
1216
.212
54.3
1317
.811
93.8
1244
.612
89.1
1212
.912
63.7
1327
.212
70.0
1320
.814
35.1
4812
31.9
1270
.013
06.6
1263
.713
11.4
1368
.612
44.6
1295
.413
46.2
1270
.013
20.8
1390
.713
20.8
1371
.614
85.9
5012
82.7
1325
.613
57.4
1317
.813
55.9
1419
.412
95.4
1346
.214
03.4
1320
.813
71.6
1447
.8-
--
5213
33.5
1376
.414
08.2
1368
.614
06.7
1470
.213
46.2
1397
.014
54.2
1371
.614
22.4
1498
.6-
--
5413
84.3
1422
.414
63.8
1403
.414
54.2
1530
.414
03.4
1454
.215
17.7
1428
.814
79.6
1555
.8-
--
5614
44.8
1478
.015
14.6
1479
.615
24.0
1593
.914
54.2
1505
.015
68.5
1479
.615
30.4
1612
.9-
--
5815
00.1
1528
.815
79.6
1535
.215
73.3
1655
.815
05.0
1555
.816
19.3
1536
.715
87.5
1663
.7-
--
6015
57.3
1586
.016
30.4
1589
.016
30.4
1706
.615
68.5
1619
.316
82.8
1593
.916
44.7
1733
.6-
--
Dim
ensio
ns in
mm
(1) I
nner
dia
met
er (d
1) -
tole
ranc
e of
NPS
26-
34 ±
0.8
mm
, tol
eran
ce o
f NPS
36-
60 ±
1.3
mm
(2) O
uter
dia
met
er (d
2) -
tole
ranc
e of
from
NPS
26-
60 ±
1.5
mm
(3) O
uter
dia
met
er c
ente
ring
ring
(d3)
- to
lera
nce
± 0
.8 m
m(4
) The
re a
re n
o fla
nges
from
NPS
50
and
larg
er
Quality Is Our Passion
Your Gasket Professionals
Möl
ler-M
etal
ldic
htun
gen
Gm
bH |
Brun
nenw
eg 1
0 | 3
9444
Hec
klin
gen
| pho
ne: +
49 3
925
3789
0-0
| fax
: +49
392
5 93
0037
| e-
mai
l: m
oelle
r@m
oelle
r-md.
de |
ww
w-m
oelle
r-md.
de |
date
of:
18.0
1.20
21 |
Rev.
: 03
Inner rings according to ASME B16.47 - flanges form A and B
Inner ring dimensions for spiral-wound seals - ASME B16.47 - Series A
Nominal width Class
NPS 150 300 400 600 900 (1)
26 654.1 654.1 660.4 647.7 660.4
28 704.9 704.9 711.2 698.5 711.2
30 755.7 755.7 755.7 755.7 768.4
32 806.5 806.5 812.8 812.8 812.8
34 857.3 857.3 863.6 863.6 863.6
36 908.1 908.1 917.7 917.7 920.8
38 958.9 952.5 952.5 952.5 1009.7
40 1009.7 1003.3 1003.3 1009.7 1060.5
42 1060.5 1054.1 1051.1 1066.8 1111.3
44 1111.3 1104.9 1104.9 1111.3 1155.7
46 1162.1 1152.7 1168.4 1162.1 1219.2
48 1212.9 1209.8 1206.5 1219.2 1270.0
50 1263.7 1244.6 1257.3 1270.0 -
52 1314.5 1320.8 1308.1 1320.8 -
54 1358.9 1352.6 1352.6 1378.0 -
56 1409.7 1403.4 1403.4 1428.8 -
58 1460.5 1447.8 1454.2 1473.2 -
60 1511.3 1524.0 1517.7 1530.4 -
Inner ring dimensions for spiral wound seals - ASME B16.47 - Series B
Nominal width Class
NPS 150 300 400 600 900 (1)
26 654.1 654.1 654.1 644.7 666.8
28 704.9 704.9 701.8 685.8 717.6
30 755.7 755.7 752.6 752.6 781.1
32 806.5 806.5 800.1 793.8 838.2
34 857.3 857.3 850.9 850.9 895.4
36 908.1 908.1 898.7 901.7 920.8
38 958.9 971.6 952.5 952.5 1009.7
40 1009.7 1022.4 1000.3 1009.7 1060.5
42 1060.5 1085.9 1051.1 1066.8 1111.3
44 1111.3 1124.0 1104.9 1111.3 1155.7
46 1162.1 1178.1 1168.4 1162.1 1219.2
48 1212.9 1231.9 1206.5 1219.2 1270.0
50 1263.7 1367.0 1257.3 1270.0 -
52 1314.5 1317.8 1308.1 1320.8 -
54 1365.3 1365.3 1352.6 1378.0 -
56 1422.4 1428.8 1403.4 1428.8 -
58 1478.0 1484.4 1454.2 1473.2 -
60 1535.2 1557.3 1517.7 1530.4 -
• all dimensions in mm• inner ring thickness between 2.97 and 3.33 mm• tolerance of inner ring ± 3.0 mm• inner ring for use with pipe walls of 9.53 mm and thicker1) There are no flanges from NPS 50 and larger
• all dimensions in mm• inner ring thickness between 2.97 and 3.33 mm• tolerance of inner ring ± 3.0 mm• inner ring for use with pipe walls of 9.53 mm and thicker1) There are no flanges from NPS 50 and larger
• experience• technologies• designs and calculations• trainings• cooperation partners
Satisfied customers are our incentive!
We achieve this, because we are committed to the needs of our con-sumers, we listen to them and produce exactly the metal gaskets that exactly meet their requirements for pressure, temperature and medium resistance.
Your advantages
• most modern production technologies• every gasket tested and certified• technical consulting and training• all orders shipped within 24 hours• fast assembly due to high fitting accuracy• All gaskets are guaranteed Made in Germany!
Order example:
Spiral-wound seals with centering and inner ring, as well as EC zone (diffusion barrier or maintenance of electrical conductivity)MMD-SWG-CR-IR-ECDN 80PN10-40 according to EN 1514-21.4541/graphite/PTFE
Orders are also possible according to sample gasket or drawing.
Individually made according to customer requirements