Silicone Rubber (Si) O-Rings (0.210 Section): Reliable Sealing for Temperature-Extreme Environments
Silicone Rubber (Si) O-Rings (0.210 section) from TFM are designed for dependable static sealing in environments where temperature extremes, ozone exposure, and chemical compatibility are key concerns. Manufactured from premium 1200-70 grade silicone, these O-rings exhibit strong resistance to ozone, acids, and moisture, while maintaining flexibility across a wide thermal spectrum—from -50°C to 230°C.
Engineered with a 70 durometer hardness and signature brick red color, these silicone O-rings are ideal for applications where elastomeric integrity and cleanliness are critical, such as in vacuum assemblies, pharmaceutical equipment, and analytical instrumentation.
Key Features of Silicone Rubber (Si) O-Rings (0.210 Section):
Material Grade: 1200-70 Silicone
Durometer Hardness: 70 Shore A
Color: Brick Red
Cross-Section Diameter: 0.210 inches
Temperature Range:
Minimum: –50°C
Maximum: +230°C
Reliable under thermal cycling and moderate bakeout conditions.
Performance Characteristics:
Excellent: Resistance to ozone, weathering, water, and dilute acids
Fair: Resistance to heat and UV exposure
Limited: Shear strength, tensile resistance, and resistance to hydrocarbons or fuels
Common Applications:
Static sealing of KF and CF vacuum flange assemblies
Optical systems, sensor housings, and low-pressure enclosures
Gasket and sealing elements for OEM scientific instruments
Use in HVAC, medical devices, and cleanroom utilities
These 0.210 section Silicone Rubber O-Rings from TFM provide a dependable sealing solution for demanding low-pressure or UHV setups where chemical compatibility, ozone resistance, and wide temperature stability are required.
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