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Profile | Material | Hardness | Temperature | Bars | Speed |
NBR / FPM / VMQ / EPDM / FFKM | * | * | * | * |
*Depending on the material selected
The primary function of rubber washers is to create a seal and prevent leaks or friction between two surfaces. They are an excellent alternative to O-Rings and/or X-rings as they often improve the sealing efficiency. They are commonly used to create a tight seal between two connected components but can also provide electrical insulation between two connected surfaces. And last but not least, washers can help absorb vibrations, shocks, or impacts, reducing the risk of damage to the connected components and serve as a barrier between two different metals, helping to prevent galvanic corrosion.
There are different manufacturing processes to produce washers:
The most common materials are EPDM, NBR and FPM but washers can be produced in any other elastomers such as VMQ, HNBR, CR, FFKM, etc... as well as in approved compounds for food (FDA, 1935/2004, NSF51), drinking water (UBA, WRAS, ACS, KIWA, EN681-1, NSF61) or gas (EN649).
For special requirements, other materials like PU, TPU or PTFE can be a very effective in specific applications.
Any application in which an O-ring can be replaced like flanges, valves, cylinders, plates or locks.
There is no chart of standard sizes since any size can be manufactured according to the needs. However, we present below some sizes as an example:
Nominal | d1 | d2 | H |
M1.6 | 1,70 | 4 | 0,3 |
M2 | 2,20 | 5 | 0,3 |
M2.5 | 2,70 | 6 | 0,5 |
M2.6 | 2,80 | 7 | 0,5 |
M3 | 3,20 | 7 | 0,5 |
M3.5 | 3,70 | 8 | 0,5 |
M4 | 4,30 | 9 | 0,8 |
M5 | 5,30 | 10 | 1 |
M6 | 6,40 | 12 | 1,6 |
M7 | 7,40 | 14 | 1,6 |
M8 | 8,40 | 16 | 1,6 |
M10 | 10,50 | 20 | 2 |
M12 | 13 | 24 | 2,5 |
M14 | 15 | 28 | 2,5 |
M16 | 17 | 30 | 3 |
M18 | 19 | 34 | 3 |
M20 | 21 | 37 | 3 |
M22 | 23 | 39 | 3 |
M24 | 25 | 44 | 4 |
M27 | 28 | 50 | 4 |
M30 | 31 | 56 | 4 |
M33 | 34 | 60 | 5 |
M36 | 37 | 66 | 5 |
M39 | 40 | 72 | 6 |
M42 | 43 | 78 | 7 |
M45 | 46 | 85 | 7 |
M48 | 50 | 92 | 8 |
M52 | 54 | 98 | 8 |
M56 | 58 | 105 | 9 |
Nominal | d1 | d2 | H |
1/4" | 8 | 12 | 2 |
3/8" | 8 | 14,50 | 2 |
3/8" | 10 | 14 | 2 |
3/8" | 10 | 15 | 2 |
20/150" | 12 | 17,50 | 2 |
1/2" | 10 | 19 | 2 |
1/2" | 11 | 18 | 2 |
1/2" | 11 | 19 | 3 |
1/2" | 12 | 18 | 2 |
1/2" | 12 | 19 | 2 |
1/2" | 13 | 18 | 2,20 |
1/2" | 14 | 18 | 2 |
5/8" | 15 | 21 | 2 |
3/4" | 13 | 24 | 2,50 |
3/4" | 16 | 23 | 2,50 |
3/4" | 16 | 24 | 2 |
3/4" | 18,5 | 23,5 | 2,5 |
7/8" | 20 | 27 | 2 |
7/8" | 21 | 26,5 | 2 |
7/8" | 22 | 27 | 2,50 |
1" | 20 | 30 | 2 |
1" | 23 | 30 | 2,50 |
1" | 24 | 29 | 2,50 |
1.1/4" | 28 | 33 | 2 |
1.1/4" | 29 | 38 | 3 |
1.1/4" | 32 | 38 | 2,50 |
1.1/2" | 30 | 44 | 2,50 |
1.1/2" | 35 | 44 | 2,50 |
1.1/2" | 37 | 44 | 2,50 |
2" | 44 | 54 | 3 |
2" | 47 | 54 | 3 |
2.1/2" | 56 | 69 | 3,50 |
3" | 69 | 82 | 3,50 |
Nominal Diameter (mm) | Inside (mm) | External (mm) | |||
EN2 | EN1 | EG2 | EG1 | ||
From | Up to | Standard tolerances | Low tolerances | Standard tolerances | Low tolerances |
6,30 | 10 | 0,35 | 0,25 | 0,25 | 0,15 |
10 | 16 | 0,40 | 0,35 | 0,35 | 0,20 |
16 | 25 | 0,50 | 0,40 | 0,40 | 0,20 |
25 | 40 | 0,70 | 0,50 | 0,50 | 0,25 |
40 | 63 | 0,80 | 0,70 | 0,70 | 0,35 |
63 | 100 | 1,00 | 0,80 | 0,80 | 0,40 |
100 | 160 | 1,30 | 1,00 | 1,00 | 0,50 |
160 | – | 0,80% | 0,60% | 0,50% | 0,30% |
Nominal Thickness (mm) | Thickness (mm) | Section (mm) | |||
EC3 | EC2 | EW2 | EW1 | ||
From | Up to | Standard tolerances | Low tolerances | Standard tolerances | Low tolerances |
0,50 | 1 | 0,20 | 0,15 | 0,20 | 0,10 |
1 | 1,60 | 0,25 | 0,20 | 0,20 | 0,10 |
1,60 | 2,50 | 0,35 | 0,20 | 0,20 | 0,10 |
2,50 | 4 | 0,40 | 0,25 | 0,20 | 0,10 |
4 | 6,30 | 0,50 | 0,35 | 0,20 | 0,15 |
6,30 | 10 | 0,70 | 0,40 | 0,25 | 0,20 |
10 | 16 | 0,80 | 0,50 | 0,35 | 0,20 |
16 | 25 | 1,00 | 0,70 | 0,40 | 0,25 |
d1 | Tolerance |
4,00 - 14,00 | +/- 0,13 |
14,01 - 15,60 | +/- 0,18 |
15,61 - 25,12 | +/- 0,23 |
25,13 - 29,78 | +/- 0,25 |
29,79 - 34,65 | +/- 0,28 |
34,66 - 44,17 | +/- 0,33 |
44,18 - 50,52 | +/- 0,38 |
50,53 - 66,40 | +/- 0,46 |
66,41 - 75,92 | +/- 0,51 |
75,93 - 94,97 | +/- 0,61 |
94,98 - 107,67 | +/- 0,69 |
107,68 - 126,72 | +/- 0,76 |
126,73 - 133,07 | +/- 0,94 |
133,08 - 158,42 | +/- 0,99 |
158,43 - 183,82 | +/- 1,02 |
183,83 - 209,22 | +/- 1,14 |
209,23 - 234,62 | +/- 1,27 |
234,63 - 278,99 | +/- 1,40 |
279,00 - 405,26 | +/- 1,65 |
405,27 - 430,66 | +/- 1,91 |
430,67 - 456,07 | +/- 2,03 |
H1 | W | T |
1,68 | +/- 0,15 | +/- 0,08 |
2,51 | +/- 0,15 | +/- 0,10 |
3,40 | +/- 0,15 | +/- 0,10 |
5,16 | +/- 0,15 | +/- 0,10 |
6,73 | +/- 0,15 | +/- 0,10 |
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