Material page for o-ring seal in Silicone (VMQ) (vinyl-methyl silicone, typically 70 Shore A). The sizes below are the ones we supply; there is no published dimensional standard for this article, so the table rather than a standard number is what to quote. Corrosion behaviour is inert and physiologically neutral; low tear and abrasion strength and the service range is approx. -60 °C to +200 °C.
Why Choose Silicone (VMQ) for O-Ring Seal — ISO / DIN (Series 159)
Used for wide temperature range and food/medical contact, in static seals only. For o-ring seal — iso / din (series 159), this matters when inert and physiologically neutral; low tear and abrasion strength is the primary requirement.
Mechanical & Physical Properties
| Grade designation | vinyl-methyl silicone, typically 70 Shore A |
|---|---|
| Magnetic response | Non-magnetic |
| Service temperature | approx. -60 °C to +200 °C |
| Corrosion characteristic | Inert and physiologically neutral; low tear and abrasion strength |
Corrosion Behavior in Service
Carbon and alloy steel o-ring seal — iso / din (series 159) require a coating for corrosion protection. Zinc plating (with or without passivation) is the most common; hot-dip galvanizing is used for outdoor structural service; black-oxide is mainly a tarnish-prevention finish for tool-room use.
Comparable Grades
For o-ring seal — iso / din (series 159), consider NBR or FKM wherever the seal is dynamic — silicone has low tear and abrasion strength and is a static-seal material. Elastomer selection is decided by the medium, the temperature range and whether the seal is static or dynamic — not by strength.
Sizes of O-Ring Seal — ISO / DIN (Series 159) Available in Silicone (VMQ)
| Inner diameter d1 (mm) | Outer diameter d2 (mm) | Wire dia (mm) | Working temp range | Reference standard |
|---|---|---|---|---|
| 5 | 9 | 2 | -30 to +110 C | ISO 3601 / GB/T 3452 |
| 8 | 12 | 2 | -30 to +110 C | ISO 3601 / GB/T 3452 |
| 10 | 16 | 3 | -30 to +110 C | ISO 3601 / GB/T 3452 |
| 15 | 21 | 3 | -30 to +110 C | ISO 3601 / GB/T 3452 |
| 20 | 26 | 3 | -30 to +110 C | ISO 3601 / GB/T 3452 |
| 25 | 33 | 4 | -30 to +110 C | ISO 3601 / GB/T 3452 |
| 30 | 38 | 4 | -30 to +110 C | ISO 3601 / GB/T 3452 |
| 40 | 50 | 5 | -30 to +110 C | ISO 3601 / GB/T 3452 |
| 50 | 60 | 5 | -30 to +110 C | ISO 3601 / GB/T 3452 |
| 60 | 72 | 6 | -30 to +110 C | ISO 3601 / GB/T 3452 |
| 80 | 92 | 6 | -30 to +110 C | ISO 3601 / GB/T 3452 |
| 100 | 114 | 7 | -30 to +110 C | ISO 3601 / GB/T 3452 |
Dimensions are independent of the material: the table above lists the sizes supplied, and on this page every one of them is quoted in Silicone (VMQ). The catalogue's default material column has been omitted here so it cannot be read as contradicting that.
Custom manufacturing · Made to drawing
Need this seal in a grade that is not listed?
Silicone is one of the grades the catalog describes. Inside diameter, cross-section and compound are the three that matter, and the compound is chosen against the fluid and the temperature rather than the dimensions.
Minimum order from 2,000 pieces; samples within 7 days of drawing approval.
