MATERIALS
O-Ring Materials
🔴 NBR (Nitrile) 🟣 FKM (Viton) 🔵 Silicone 🟢 EPDM 🟠 HNBR

Silicone O-Rings

Premium food-grade silicone O-rings engineered for extreme temperature flexibility and FDA compliance. Exceptional performance from -60°C to 225°C with outstanding flexibility, making them ideal for medical devices, food processing, and consumer applications requiring biocompatibility.

Silicone Properties & Specifications

📊 Physical Properties

Material TypeSilicone (VMQ/MVQ)
Continuous Temperature-60°C to 225°C (-76°F to 437°F)
Short-term TemperatureUp to 250°C (482°F)
Hardness Range40-80 Shore A
Tensile Strength6.2-10.3 MPa (900-1500 psi)
Elongation at Break100-800%

🎨 Available Options

Standard Colors:

Hardness Options:

Certifications:

Temperature Performance

Temperature Capabilities
Temperature Range Fahrenheit Celsius Duration Performance Notes
Continuous Operating -67°F to +482°F -55°C to +250°C Unlimited Optimal performance range
Short-term Exposure Up to +518°F Up to +270°C Up to 48 hours Emergency/startup conditions
Brittle Point N/A Becomes rigid, may crack

Chemical Compatibility

✅ Excellent Resistance

  • Water and Steam
  • Ozone and UV Radiation
  • Dilute Acids and Alkalis
  • Food Products and Beverages
  • Pharmaceuticals
  • Ethylene Glycol

⚠️ Poor/No Resistance

  • Petroleum Oils and Fuels
  • Aromatic Hydrocarbons
  • Concentrated Acids
  • Steam above 150°C
  • Ketones and Esters
Chemical Resistance Chart (Common Fluids)
Chemical/Fluid Concentration Temperature Rating Notes

Rating Scale: Excellent = No effect, Good = Slight effect acceptable, Fair = Moderate effect, Poor = Severe effect, not recommended

Common Applications

🏭 Industrial Applications

  • Food & Beverage Processing Equipment
  • Pharmaceutical Manufacturing
  • Medical Device Sealing
  • Heating/Cooling System Seals
  • Clean Room Applications

🚗 Automotive Applications

  • Engine Cooling System Seals
  • Brake Fluid Reservoirs
  • HVAC System Components
  • Electrical Connection Seals
  • Sensor Housing Gaskets

🏠 Consumer Applications

  • Kitchen Appliance Seals
  • Baby Bottles and Pacifiers
  • Swimming Pool Equipment
  • Water Filtration Systems
  • Personal Care Devices

Available AS568 Sizes in Silicone

Popular AS568 O-Ring Sizes in Silicone
AS568 Size ID (inches) CS (inches) OD (inches) 70A Price Range 80A Price Range
AS568-214 0.739 0.070 0.879
AS568-110 0.489 0.070 0.629
AS568-325 1.475 0.070 1.615
AS568-030 1.112 0.139 1.390
AS568-012 0.301 0.070 0.441

* Prices shown are per piece for quantities 1-99. Volume discounts available for larger quantities.

Complete AS568 Size Chart Request Custom Quote

Installation & Handling Tips

🔧 Installation Best Practices

  • Clean groove thoroughly before installation
  • Lubricate with compatible lubricant
  • Avoid sharp edges during installation
  • Check for proper compression (typically 15-25%)
  • Verify groove dimensions match AS568 standards

📦 Storage & Handling

  • Store in cool, dark, dry environment
  • Avoid exposure to UV light and ozone
  • Keep away from sharp objects
  • Rotate stock using FIFO method
  • Shelf life:

Common Issues & Solutions

O-Ring Troubleshooting Guide
Problem Possible Cause Solution Prevention
Premature hardening Excessive temperature or ozone Replace with higher temp material Check operating temperature limits
Swelling Chemical incompatibility Switch to chemically resistant material Review chemical compatibility chart
Extrusion damage Excessive pressure or clearance Use harder durometer or backup ring Design proper groove clearances
Surface cracking Ozone, UV, or flexing Use ozone-resistant material Protect from environmental exposure

Need O-Rings?

Get a quote for O-rings in any AS568 size or custom dimensions.

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