O-Ring Materials-SI,VMQ
With Silicone main chain from silicon (-si-o-si) combined chemical structure. Silicone Rubber O rings features are heat-resistant, cold, non-toxic, with good electrical insulation properties, not resistant to oil, ozone and solvents.
Operating temperature: –65 to +400 °F
Best● Better○ Good△ BadX
| Rubber type (ASTM Abbreviation ) |
Silicone Rubber SI, VMQ |
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| Chemical structure | Silicone main chain from silicon (-si-o-si) combined |
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| Main feature | Heat-resistant, cold, non-toxic, with good electrical insulation properties, not resistant to oil, ozone and solvents. | ||
| Pure rubber properties | proportion Muni viscosity ML1+ (100℃) |
0.95 ∼ 0.98 Liquid |
|
| Physical properties of synthetic rubber | Possible JIS hardness range General temperature range(℃) Special temperature range(℃) Tensile strength (kg/cm2) Elongation (%) Anti-elastic Cracking Wear resistance Bending resistance |
30 ∼ 80 -40 ∼ 200 -70 ∼ 300 40 ∼ 100 500 ∼ 50 ● X ~ △ X ~ △ X ~ ○ |
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| Various properties of synthetic rubber | lubricating oil | Engine oil Gear Oil Motor oil Shaft lubricant Refrigeration oil Butter Lithium oil Oyster sauce |
● △ ○ △ △ △ ● X |
| Working oil | Pot shaft oil Oil + Water emulsion system Water + Glycol Phosphate ester Si Brake Fluid Gear oil |
○ △ △ ○ X ○ △ |
|
| Fuel oil | Light oil、kerosene Heavy oil Gasoline |
X X X |
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| Water | Water、Warm water Water vapor、Hot water Antifreeze water Water cutting oil |
○ △ △ △ |
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| Drug |
Hydrochloric acid 20% |
△ ○ △ X X X ○ ● X ~ △ ● X ~ △ ○ △ |
|
| Gas | LPG Urban gas Ozone Freon 12 Freon 22 |
X △ ● X X |
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| Other |
Food Sanitation Law |
● ● |
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| The main purpose | Use electrical, electronic, medical, food and other seals. | ||