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High Temperature Food Grade Silicone O-Ring for Automotive Engines/Food and Beverage
Material Overview
Silicon O-rings are primarily made from silicone rubber, a synthetic polymer composed of silicon, oxygen, carbon, and hydrogen. It is categorized into two main types:
VMQ (Virgin MQ Silicone): The most common type, offering excellent general-purpose performance.
FVMQ (Fluorinated Silicone): Enhanced with fluorine for improved chemical resistance, especially against fuels and oils.
Silicone rubber is non-toxic, odorless, and has good biocompatibility, making it suitable for food, medical, and pharmaceutical applications.
Basic information
Parameter | VMQ Silicone O-Ring | FVMQ Fluorosilicone O-Ring |
Material Type | Virgin Silicone Rubber | Fluorinated Silicone Rubber |
Temperature Range | -60°C to 230°C (-76°F to 446°F) | -55°C to 250°C (-67°F to 482°F) |
Hardness (Shore A) | 40–80 | 50–80 |
Tensile Strength | ≥7 MPa (1015 PSI) | ≥8 MPa (1160 PSI) |
Elongation at Break | ≥300% | ≥250% |
Compression Set (22hrs @ 175°C) | ≤25% | ≤20% |
Chemical Resistance | Water, steam, ozone, UV | Fuels, oils, solvents, chemicals |
Standards Compliance | FDA, USP Class VI, ISO 10993 | FDA, USP Class VI, ISO 10993 |
Color Options | Translucent, black, custom | Black, brown, custom |
Key Performance Characteristics
Temperature Resistance:
Can withstand a wide range: from -60°C (-76°F) to 230°C (446°F) (VMQ) or up to 250°C (482°F) (FVMQ).
Maintains flexibility and sealing integrity in extreme hot or cold environments.
Chemical Resistance:
Resistant to water, steam, ozone, UV light, and mild acids/bases.
Not recommended for use with oils, solvents, or fuels (FVMQ offers better resistance here).
Electrical Insulation: Excellent dielectric properties, making it ideal for electrical and electronic applications.
Compression Set: Low compression set (permanent deformation after compression), ensuring long-term sealing performance.
Typical Applications
Medical & Pharmaceutical: Syringes, catheters, respiratory equipment, and drug delivery systems.
Food & Beverage: Seals in coffee machines, ovens, refrigerators, and food processing equipment.
Automotive: Gaskets for engine components, cooling systems, and lighting (especially high-temperature areas).
Electronics: Seals for connectors, sensors, and outdoor enclosures (protection against dust and moisture).
Aerospace: Sealing systems for aircraft engines and hydraulic systems (resistant to extreme temperatures).
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