O-rings

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Whenever the chemical and thermal resistance of standard rubber O-Rings in static applications like static seals or flange connections is no longer sufficient, PTFE O-Ring is the solution.

PTFE O-Rings are produced following the standard dash sizes as for rubber sizes. They are circular rings with an ID and a cord diameter, which gives various advantages on the rubber O-Rings.
They guarantee all the chemical and mechanical characteristics of PTFE, but have a low elasticity and during installation they can be stretched or compressed to a limited extent.

The PTFE O-Ring improving solution
Guarniflon offers a wide range of Virgin PTFE grade O-Rings standard list.
   PTFE O-Ring Configurations
As for rubber, even the PTFE O-Rings refer to a standard dash size list:
O-Ring AS568A
To choose the right O-Ring size to use, the nominal diameter of the application (rod or bore) must always be considered.

PTFE O-Rings standard sizes
METRIC (mm)
US STANDARD
METRIC (mm)
US STANDARD
DASH #
ID
C/S
ID
C/S
DASH #
ID
C/S
ID
C/S
-004
1,78
1.78
.070
.070
-109
7,59
2,62
.299
.103
-005
2,57
.101
-110
9,19
.362
-006
2,9
.114
-111
10,77
.424
-007
3,68
.145
-112
12,37
.487
-008
4,47
.176
-113
13,94
.549
-009
5,28
.176
-114
15,54
.612
-010
6,07
.239
-115
17,12
.674
-011
7,65
.301
-116
18,72
.737
-012
9,25
.364
-117
20,3
.799
-013
10,82
.426
-118
21,89
.862
-014
12,42
.489
-119
23,47
.924
-015
14
.551
-120
25,07
.97
-016
15,6
.614
-121
26,64
1.049
-017
17,17
.676
-122
28,24
1.112
-018
18,77
.739
-123
29,82
1.174
-019
20,35
.801
-124
31,42
1.237
-020
21,95
.864
-125
32,99
1.299
-021
23,52
.926
-126
34,59
1.362
-022
25,12
.989
-127
36,17
1.424
-023
26,7
1.051
-128
37,77
1.487
-024
28,3
1.114
-129
39,34
1.549
-025
29,87
1.176
-130
40,94
1.612
-026
31,47
1.239
-131
42,52
1.674
-027
33,05
1.301
-132
44,12
1.737
-028
34,65
1.364
-133
45,69
1.799
-029
37,82
1.489
-134
47,3
1.862
-030
41
1.614
-135
48,9
1.925
-031
44,17
1.739
-136
50,47
1.987
-032
47,35
1.864
-137
52,07
2.050
-033
50,52
1.989
-138
53,64
2.112
-034
53,7
2.114
-139
55,25
2.175
-035
56,87
2.239
-140
56,82
2.237
-036
60,05
2.364
-141
58,42
2,03
-103
2,06
2,62
.081
.103
-201
4,34
3,53
.171
.139
-104
2,84
.112
-202
5,94
.234
-105
3,63
.143
-203
7,52
.296
-106
4,42
.174
-204
9,12
.359
-107
5,23
.206
-205
10,69
.421
-108
6,02
.237
-206
12,29
.484
METRIC (mm)
US STANDARD
METRIC (mm)
US STANDARD
DASH #
ID
C/S
ID
C/S
DASH #
ID
C/S
ID
C/S
-207
13,87
3,53
.546
.139
-318
24,77
5,33
.975
.210
-208
15,47
.609
-319
26,34
1.037
-209
17,04
.671
-320
27,94
1.1
-210
18,64
.734
-320
27,94
1.1
-211
20,22
.796
-321
29,51
1.162
-212
21,82
.859
-321
29,51
1.162
-213
23,39
.921
-322
31,12
1.225
-214
25
.984
-323
32,69
1.287
-215
26,57
1.046
-324
34,29
01:35
-216
28,17
1.109
-325
37,47
1.475
-217
29,74
1.171
-325
37,47
1.475
-218
31,34
1.234
-326
40,64
1.6
-219
32,92
1.296
-327
43,82
1.725
-220
34,52
1.359
-328
46,99
1.85
-221
36,09
1.421
-329
50,17
1.975
-222
37,69
1.484
-330
53,34
02:01
-223
40,87
1.609
-224
44,04
1.734
-901
4,7
1,42
.185
.056
-225
47,22
1.859
-902
6,07
1,63
.239
.064
-226
50,39
1.984
-903
7,65
.301
-227
53,57
2.109
-904
8,92
1,83
.351
.072
-228
56,74
2.234
-905
10,52
.414
-906
11,89
1,98
.468
.078
-309
10,46
5,33
.412
.210
-907
13,46
2,08
.53
.082
-310
12,07
.475
-908
16,36
2,21
.644
.087
-310
12,07
.475
-909
17,93
2,46
.706
.097
-311
13,64
.537
-910
19,18
.755
-311
13,64
.537
-911
21,92
2,95
.863
.116
-312
15,24
.600
-912
23,47
.924
-313
16,81
.662
-913
25,04
.986
-314
18,42
.725
-914
26,59
1.047
-314
18,42
.725
-916
29,74
1.171
-315
19,99
.787
-918
34,42
1.355
-316
21,59
.850
-920
37,47
3
1.475
-317
23,16
.912
-924
43,69
1.72
-317
23,16
.912
-928
53,09
02:09
                                     
 
alt * any other size not included in these lists can be custom made on demand
 
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