O-rings are one of the most widely used types of seals in various industries. They are simple, circular elastomeric rings that create a tight seal between two or more parts to prevent fluid or gas leakage.
Key Features of O-Rings
✔ Versatile – Suitable for sealing gases, liquids, and chemicals. ✔ Reliable – Can withstand high pressure and extreme temperatures. ✔ Cost-Effective – Simple design with low manufacturing costs. ✔ Reusable – Depending on material and application, they can be reinstalled after disassembly.
Common Applications
🛠 Automotive & Aerospace – Engines, fuel systems, and hydraulic systems. 🛠 Industrial Machinery – Pumps, valves, and compressors. 🛠 Medical & Pharmaceutical – Sterile and FDA-approved sealing for medical devices. 🛠 Oil & Gas – High-pressure and high-temperature sealing in pipelines and drilling equipment. 🛠 Food & Beverage – Used in food processing equipment to prevent contamination.
Materials & Properties
Material
Temperature Range
Properties
Common Uses
Nitrile (NBR)
-40°C to 120°C
Good oil & fuel resistance
Automotive, hydraulic seals
Fluoroelastomer (FKM/Viton®)
-20°C to 200°C
High heat & chemical resistance
Aerospace, chemical processing
Silicone
-60°C to 230°C
Flexible, FDA-approved
Medical, food processing
EPDM
-50°C to 150°C
Excellent weather & water resistance
Water systems, outdoor applications
PTFE (Teflon®)
-200°C to 250°C
Low friction, chemical-resistant
Extreme conditions, chemical processing
O-Ring Sizing
O-rings are specified by: 🔹 Inner Diameter (ID) – The inside measurement of the ring. 🔹 Outer Diameter (OD) – The total width of the ring. 🔹 Cross-Section (CS) – The thickness of the ring. 🔹 AS568 & Metric Standards – O-rings are available in standardized inch and metric sizes.
