Labyrinth plastic seal

The corrosion-free material properties mean that the plastic seals from GMN are particularly well-suited for protecting from watery liquids.

Polyoxymethylene has a high resistance to a variety of acids (lactic acids), chemicals and fungi. GMN non-contact plastic seals are approved for the food industry.

 

DI_BF_SSA_M30_821x550

Series S/SA

S design

The S design is particularly suited for use with normal spray load for rotating shafts and hubs.

 

Technical Data:
  • Outer and inner ring: high quality Polyoxymethylene plastic
  • Temperature range: -40 ° – 60 °C (special design with O-ring up to 80 °C)
  • Shaft diameter: 10 – 160 mm (customized solutions available upon request)
  • Width: 10, 12, 15 mm (depending on size)
  • Sealing gap: Conical
  • Axial play: Sax = 1 mm (total axial movement of the seals from one end position to the other)

Greased seals: All types in the S design are also available with a greased sealing gap for improved protection from dust. (Ordering designation: SdxDxB greased)

DI_BF_S_1
DI_BF_S_2

SA design with drainage grooves

The SA design is additionally equipped with a drainage groove on the outer ring for rotating shafts that removes any penetrated liquid during heavy and direct spray impact.

 

Technical data:

The technical data for the SA design is the same as for the S design.

DI_BF_SA_1
DI_BF_SA_2

Characteristics

  • Frictionless

    Thanks to their non-contact design, GMN labyrinth seals guarantee completely frictionless operation.

  • Wear-free

GMN seal components work completely wear-free and offer an unlimited service life.

  • Abrasion-free

The non-contact design of GMN seal components guarantees operation free from abrasion that fulfills the highest cleanliness requirements. (Approved for the food industry.)

  • Effective

The small distance between the outer and inner ring guarantees highly effective sealing and very good protection from fouling.

  • Heat-free

Because no friction heat is generated, neither the seal nor the adjacent components or the lubricant are subjected to thermal loads.

  • Efficient

The frictionless design enables operation without performance losses. This means that the seal offers maximum sealing effect with reduced energy consumption even at high speeds.

  • Compact

GMN labyrinth seals achieve 2–4-layered labyrinths in the smallest space.

  • Effective

GMN labyrinth seals in S and SA design use centrifugal force to improve the sealing effect. Penetrated media is transported to the large gap diameter through rotation. Therefore, the seal must always be mounted so that the large gap diameter is on the impact side.

  • Flexible

A drainage groove on the inner ring is available for applications with a rotating hub (special solution SI).

  • Dust-free

For greased seals, the entire sealing gap is filled with grease for optimal protection against ultra-fine particles.

10 - 15 mm Inner diameter

SHOW ALL AGAIN
Inner diameter
ID
[mm]
Outer diameter
OD
[mm]
Width
W
[mm]
Gap diameter
e1
[mm]
Gap diameter
e2
[mm]
Axial clearance
Sax
[mm]
Max. speed
nmax
[rpm]
Weight
kg
[kg]
Item no.
Data sheets
S 10 X 30 X 10
10
30
10
14
25
0.8
82080
0.007
301491
S 12 X 32 X 10
12
32
10
14
25
0.8
74960
0.0077
301494
S 12 X 37 X 10
12
37
10
19
30
0.8
59520
0.0107
301496
S 15 X 35 X 10
15
35
10
19
30
0.8
53380
0.0087
301498
S 15 X 42 X 10
15
42
10
24
35
0.8
44300
0.0134
301501

17 - 20 mm Inner diameter

SHOW ALL AGAIN
Inner diameter
ID
[mm]
Outer diameter
OD
[mm]
Width
W
[mm]
Gap diameter
e1
[mm]
Gap diameter
e2
[mm]
Axial clearance
Sax
[mm]
Max. speed
nmax
[rpm]
Weight
kg
[kg]
Item no.
Data sheets
S 17 X 35 X 10
17
35
10
19
30
0.8
67900
0.0081
301506
S 17 X 40 X 10
17
40
10
24
35
0.8
56900
0.0132
301509
S 17 X 47 X 10
17
47
10
31
42
0.8
45660
0.0167
301511
S 20 X 40 X 10
20
40
10
24
35
0.8
51380
0.0112
301515
S 20 X 42 X 10
20
42
10
24
35
0.8
51380
0.0119
301516
S 20 X 47 X 10
20
47
10
31
42
0.8
45600
0.0157
301517

22 - 28 mm Inner diameter

SHOW ALL AGAIN
Inner diameter
ID
[mm]
Outer diameter
OD
[mm]
Width
W
[mm]
Gap diameter
e1
[mm]
Gap diameter
e2
[mm]
Axial clearance
Sax
[mm]
Max. speed
nmax
[rpm]
Weight
kg
[kg]
Item no.
Data sheets
S 22 X 42 X 10
22
42
10
24
35
0.8
48540
0.0111
301520
S 25 X 47 X 10
25
47
10
31
42
0.8
40500
0.0138
301523
S 25 X 52 X 10
25
52
10
31
42
0.8
40500
0.0181
301524
S 26 X 47 X 10
26
47
10
31
42
0.8
39580
0.0133
301529
S 28 X 47 X 10
28
47
10
31
42
0.8
37820
0.0124
301533
S 28 X 52 X 10
28
52
10
31
42
0.8
37820
0.0167
301534

30 - 36 mm Inner diameter

SHOW ALL AGAIN
Inner diameter
ID
[mm]
Outer diameter
OD
[mm]
Width
W
[mm]
Gap diameter
e1
[mm]
Gap diameter
e2
[mm]
Axial clearance
Sax
[mm]
Max. speed
nmax
[rpm]
Weight
kg
[kg]
Item no.
Data sheets
S 30 X 62 X 10
30
62
10
46
57
0.8
25980
0.0256
301537
S 30 X 72 X 10
30
72
10
47
62
0.8
24560
0.0373
301541
S 35 X 62 X 10
35
62
10
46
57
0.8
23900
0.0228
301547
S 35 X 72 X 10
35
72
10
47
62
0.8
22660
0.0344
301550
S 36 X 62 X 10
36
62
10
46
57
0.8
23500
0.0222
301555

40 - 42 mm Inner diameter

SHOW ALL AGAIN
Inner diameter
ID
[mm]
Outer diameter
OD
[mm]
Width
W
[mm]
Gap diameter
e1
[mm]
Gap diameter
e2
[mm]
Axial clearance
Sax
[mm]
Max. speed
nmax
[rpm]
Weight
kg
[kg]
Item no.
Data sheets
S 40 X 62 X 10
40
62
10
46
57
0.8
22040
0.0225
301567
S 40 X 68 X 10
40
68
10
47
62
0.8
20980
0.0263
301570
S 40 X 90 X 10
40
90
10
60
74
0.8
17300
0.0565
301576
S 42 X 65 X 10
42
65
10
46
57
0.8
25380
0.0214
301578
S 42 X 72 X 10
42
72
10
47
62
0.8
24180
0.0298
301580

45 - 55 mm Inner diameter

SHOW ALL AGAIN
Inner diameter
ID
[mm]
Outer diameter
OD
[mm]
Width
W
[mm]
Gap diameter
e1
[mm]
Gap diameter
e2
[mm]
Axial clearance
Sax
[mm]
Max. speed
nmax
[rpm]
Weight
kg
[kg]
Item no.
Data sheets
S 45 X 80 X 10
45
80
10
60
74
0.8
19280
0.0381
301584
S 45 X 85 X 10
45
85
10
60
74
0.8
19280
0.0452
301585
S 50 X 80 X 10
50
80
10
60
74
0.8
17840
0.0339
301593
S 50 X 90 X 10
50
90
10
60
74
0.8
17840
0.0487
301596
S 55 X 80 X 10
55
80
10
60
74
0.8
19140
0.0294
301606
S 55 X 85 X 10
55
85
10
60
74
0.8
19140
0.0365
301608

60 - 70 mm Inner diameter

SHOW ALL AGAIN
Inner diameter
ID
[mm]
Outer diameter
OD
[mm]
Width
W
[mm]
Gap diameter
e1
[mm]
Gap diameter
e2
[mm]
Axial clearance
Sax
[mm]
Max. speed
nmax
[rpm]
Weight
kg
[kg]
Item no.
Data sheets
S 60 X 95 X 12
60
95
12
72
89
0.8
15460
0.0566
301618
S 60 X 110 X 12
60
110
12
87
104
0.8
13220
0.0887
301622
S 65 X 100 X 12
65
100
12
72
89
0.8
16320
0.0603
301631
S 68 X 95 X 12
68
95
12
72
89
0.8
15840
0.0459
301639
S 70 X 110 X 12
70
110
12
87
104
0.8
13420
0.0752
301643
S 70 X 125 X 15
70
125
15
96
114
0.8
12320
0.1669
301646

75 - 85 mm Inner diameter

SHOW ALL AGAIN
Inner diameter
ID
[mm]
Outer diameter
OD
[mm]
Width
W
[mm]
Gap diameter
e1
[mm]
Gap diameter
e2
[mm]
Axial clearance
Sax
[mm]
Max. speed
nmax
[rpm]
Weight
kg
[kg]
Item no.
Data sheets
S 75 X 130 X 15
75
130
15
96
114
0.8
12900
0.1556
301659
S 80 X 110 X 12
80
110
12
87
104
0.8
13320
0.0595
301666
S 80 X 140 X 15
80
140
15
116
134
0.8
9620
0.1822
301671
S 82 X 110 X 12
82
110
12
87
104
0.8
13120
0.0561
301675
S 85 X 120 X 15
85
120
15
96
114
0.8
10840
0.099
301678

90 - 120 mm Inner diameter

SHOW ALL AGAIN
Inner diameter
ID
[mm]
Outer diameter
OD
[mm]
Width
W
[mm]
Gap diameter
e1
[mm]
Gap diameter
e2
[mm]
Axial clearance
Sax
[mm]
Max. speed
nmax
[rpm]
Weight
kg
[kg]
Item no.
Data sheets
S 90 X 120 X 15
90
120
15
96
114
0.8
10440
0.0869
301687
S 90 X 145 X 15
90
145
15
116
134
0.8
9800
0.2011
301691
S 95 X 140 X 15
95
140
15
116
134
0.8
9480
0.1459
301697
S 100 X 140 X 15
100
140
15
116
134
0.8
9180
0.1325
301704
S 110 X 140 X 15
110
140
15
116
134
0.8
7900
0.1035
301715
S 120 X 150 X 15
120
150
15
126
144
0.8
6220
0.1118
301725

125 - 160 mm Inner diameter

SHOW ALL AGAIN
Inner diameter
ID
[mm]
Outer diameter
OD
[mm]
Width
W
[mm]
Gap diameter
e1
[mm]
Gap diameter
e2
[mm]
Axial clearance
Sax
[mm]
Max. speed
nmax
[rpm]
Weight
kg
[kg]
Item no.
Data sheets
S 125 X 170 X 15
125
170
15
146
164
0.8
5400
0.2065
301729
S 130 X 170 X 15
130
170
15
146
164
0.8
5260
0.1867
301731
S 140 X 170 X 15
140
170
15
146
164
0.8
5000
0.1447
301739
S 150 X 190 X 15
150
190
15
166
184
0.8
4320
0.1877
301746
S 160 X 190 X 15
160
190
15
166
184
0.8
4140
0.137
301750

10 - 15 mm Inner diameter

SHOW ALL AGAIN
Inner diameter
ID
[mm]
Outer diameter
OD
[mm]
Width
W
[mm]
Gap diameter
e1
[mm]
Gap diameter
e2
[mm]
Axial clearance
Sax
[mm]
Max. speed
nmax
[rpm]
Weight
kg
[kg]
Item no.
Data sheets
SA 10 X 30 X 10
10
30
10
14
25
0.8
82080
0.0089
301753
SA 12 X 32 X 10
12
32
10
14
25
0.8
74960
0.0077
301756
SA 12 X 37 X 10
12
37
10
19
30
0.8
59520
0.0107
301758
SA 15 X 35 X 10
15
35
10
19
30
0.8
53380
0.0087
301759
SA 15 X 42 X 10
15
42
10
24
35
0.8
44300
0.0134
301762

17 - 20 mm Inner diameter

SHOW ALL AGAIN
Inner diameter
ID
[mm]
Outer diameter
OD
[mm]
Width
W
[mm]
Gap diameter
e1
[mm]
Gap diameter
e2
[mm]
Axial clearance
Sax
[mm]
Max. speed
nmax
[rpm]
Weight
kg
[kg]
Item no.
Data sheets
SA 17 X 35 X 10
17
35
10
19
30
0.8
67900
0.0081
301767
SA 17 X 40 X 10
17
40
10
24
35
0.8
56900
0.0132
301771
SA 17 X 47 X 10
17
47
10
31
42
0.8
45660
0.0167
301773
SA 20 X 40 X 10
20
40
10
24
35
0.8
51380
0.0112
301777
SA 20 X 42 X 10
20
42
10
24
35
0.8
51380
0.0119
301779
SA 20 X 47 X 10
20
47
10
31
42
0.8
45600
0.0157
301781

22 - 28 mm Inner diameter

SHOW ALL AGAIN
Inner diameter
ID
[mm]
Outer diameter
OD
[mm]
Width
W
[mm]
Gap diameter
e1
[mm]
Gap diameter
e2
[mm]
Axial clearance
Sax
[mm]
Max. speed
nmax
[rpm]
Weight
kg
[kg]
Item no.
Data sheets
SA 22 X 42 X 10
22
42
10
24
35
0.8
48540
0.0111
301786
SA 25 X 47 X 10
25
47
10
31
42
0.8
40500
0.0138
301789
SA 25 X 52 X 10
25
52
10
31
42
0.8
40500
0.0181
301791
SA 28 X 47 X 10
28
47
10
31
42
0.8
37820
0.0124
301802
SA 28 X 52 X 10
28
52
10
31
42
0.8
37820
0.0167
301803

30 - 36 mm Inner diameter

SHOW ALL AGAIN
Inner diameter
ID
[mm]
Outer diameter
OD
[mm]
Width
W
[mm]
Gap diameter
e1
[mm]
Gap diameter
e2
[mm]
Axial clearance
Sax
[mm]
Max. speed
nmax
[rpm]
Weight
kg
[kg]
Item no.
Data sheets
SA 30 X 62 X 10
30
62
10
46
57
0.8
25980
0.0256
301807
SA 30 X 72 X 10
30
72
10
47
62
0.8
24560
0.0373
301812
SA 35 X 62 X 10
35
62
10
46
57
0.8
23900
0.0228
301819
SA 35 X 72 X 10
35
72
10
47
62
0.8
22660
0.0344
301824
SA 36 X 62 X 10
36
62
10
46
57
0.8
23500
0.0222
301829

40 - 42 mm Inner diameter

SHOW ALL AGAIN
Inner diameter
ID
[mm]
Outer diameter
OD
[mm]
Width
W
[mm]
Gap diameter
e1
[mm]
Gap diameter
e2
[mm]
Axial clearance
Sax
[mm]
Max. speed
nmax
[rpm]
Weight
kg
[kg]
Item no.
Data sheets
SA 40 X 62 X 10
40
62
10
46
57
0.8
22040
0.0225
301842
SA 40 X 68 X 10
40
68
10
47
62
0.8
20980
0.0263
301845
SA 40 X 90 X 10
40
90
10
60
74
0.8
17300
0.0565
301851
SA 42 X 65 X 10
42
65
10
46
57
0.8
25380
0.0214
301854
SA 42 X 72 X 10
42
72
10
47
62
0.8
24180
0.0298
301857

45 - 55 mm Inner diameter

SHOW ALL AGAIN
Inner diameter
ID
[mm]
Outer diameter
OD
[mm]
Width
W
[mm]
Gap diameter
e1
[mm]
Gap diameter
e2
[mm]
Axial clearance
Sax
[mm]
Max. speed
nmax
[rpm]
Weight
kg
[kg]
Item no.
Data sheets
SA 45 X 80 X 10
45
80
10
60
74
0.8
19280
0.0381
301862
SA 45 X 85 X 10
45
85
10
60
74
0.8
19280
0.0452
301864
SA 50 X 80 X 10
50
80
10
60
74
0.8
17840
0.0339
301873
SA 50 X 90 X 10
50
90
10
60
74
0.8
17840
0.0487
301876
SA 55 X 80 X 10
55
80
10
60
74
0.8
19140
0.0294
301886
SA 55 X 85 X 10
55
85
10
60
74
0.8
19140
0.0365
301888

60 - 70 mm Inner diameter

SHOW ALL AGAIN
Inner diameter
ID
[mm]
Outer diameter
OD
[mm]
Width
W
[mm]
Gap diameter
e1
[mm]
Gap diameter
e2
[mm]
Axial clearance
Sax
[mm]
Max. speed
nmax
[rpm]
Weight
kg
[kg]
Item no.
Data sheets
SA 60 X 95 X 12
60
95
12
72
89
0.8
15460
0.0566
301899
SA 60 X 110 X 12
60
110
12
87
104
0.8
13220
0.0887
301901
SA 65 X 100 X 12
65
100
12
72
89
0.8
16320
0.0603
301910
SA 68 X 95 X 12
68
95
12
72
89
0.8
15840
0.0459
301918
SA 70 X 110 X 12
70
110
12
87
104
0.8
13420
0.0752
301920
SA 70 X 125 X 15
70
125
15
96
114
0.8
12320
0.1669
301923

75 - 85 mm Inner diameter

SHOW ALL AGAIN
Inner diameter
ID
[mm]
Outer diameter
OD
[mm]
Width
W
[mm]
Gap diameter
e1
[mm]
Gap diameter
e2
[mm]
Axial clearance
Sax
[mm]
Max. speed
nmax
[rpm]
Weight
kg
[kg]
Item no.
Data sheets
SA 75 X 130 X 15
75
130
15
96
114
0.8
12900
0.1556
301936
SA 80 X 110 X 12
80
110
12
87
104
0.8
13320
0.0595
301944
SA 80 X 140 X 15
80
140
15
116
134
0.8
9620
0.1822
301950
SA 82 X 110 X 12
82
110
12
87
104
0.8
13120
0.0561
301954
SA 85 X 120 X 15
85
120
15
96
114
0.8
10840
0.099
301956

90 - 120 mm Inner diameter

SHOW ALL AGAIN
Inner diameter
ID
[mm]
Outer diameter
OD
[mm]
Width
W
[mm]
Gap diameter
e1
[mm]
Gap diameter
e2
[mm]
Axial clearance
Sax
[mm]
Max. speed
nmax
[rpm]
Weight
kg
[kg]
Item no.
Data sheets
SA 90 X 120 X 15
90
120
15
96
114
0.8
10440
0.0869
301963
SA 90 X 145 X 15
90
145
15
116
134
0.8
9800
0.2011
301968
SA 95 X 140 X 15
95
140
15
116
134
0.8
9480
0.1459
301973
SA 100 X 140 X 15
100
140
15
116
134
0.8
9180
0.1325
301981
SA 110 X 140 X 15
110
140
15
116
134
0.8
7900
0.1035
301992
SA 120 X 150 X 15
120
150
15
126
144
0.8
6220
0.1118
302002

125 - 160 mm Inner diameter

SHOW ALL AGAIN
Inner diameter
ID
[mm]
Outer diameter
OD
[mm]
Width
W
[mm]
Gap diameter
e1
[mm]
Gap diameter
e2
[mm]
Axial clearance
Sax
[mm]
Max. speed
nmax
[rpm]
Weight
kg
[kg]
Item no.
Data sheets
SA 125 X 170 X 15
125
170
15
146
164
0.8
5400
0.2065
302008
SA 130 X 170 X 15
130
170
15
146
164
0.8
5260
0.1867
302011
SA 140 X 170 X 15
140
170
15
146
164
0.8
5000
0.15
302019
SA 150 X 190 X 15
150
190
15
166
184
0.8
4320
0.1877
302025
SA 160 X 190 X 15
160
190
15
166
184
0.8
4140
0.137
302029

Special plastic design

GMN offers special solutions optimized for the specific requirements above and beyond the extensive standard product range for non-contact plastic seals. Customer-specific dimensions can be produced on request.

Design with O-ring

Temperature-resistant design with O-ring up to 80 °C

To secure the press fit, in particular of the outer ring in temperatures up to 80 °C, an O-ring is mounted in a groove on the seal outer ring (optionally also on the inner ring).

The design with O-ring is available in all GMN sizes. (Quotations on request)

 

DI_BF_Oring_1
DI_BF_Oring_2

Specific installation instructions - model S/SA

Surrounding structure (connecting parts)

Tolerances

Housing: H7

Shaft: h7

Surface quality: Rz ≤ 16 µm; Ra ≤ 3.2 µm

Installation

The length “l” of the chamfering of shaft and housing depends on the width “W”.

l = 0.1 x W

 

DI_BF_SSA_MO_550x550_englisch
Blindbild_2x550

Tandem arrangement (S design)

With tandem arrangement, the plastic seals are mounted with different orientation. One seal offers protection against potential fouling from the outside, while the other seal seals the lubricant on the bearing. The smaller gap diameters are oriented to the interspace of the seal (min. distance 5 mm).

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Seals with drainage groove (SA design)

When installing the “SA” design, the return groove is located at the lowest point on the stationary ring.

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