18909: O-RING

**Product Description: O-Rings** **General Description:** - **Shape and Function:** O-rings are elastomeric loops with a round cross-section, designed to form seals between parts in both static and dynamic applications, such as hydraulic pistons or rotating shafts. - **Material:** Made from various elastomers to suit different chemical, temperature, and pressure conditions. Common materials include: - Nitrile rubber (NBR) - Ethylene propylene rubber (EPR) - Silicone - Fluorocarbon (Viton) **Specifications:** - **Dimensions:** Defined by inside diameter (ID) and cross-sectional diameter (thickness). Follow standards like AS568 (inch sizes) and ISO 3601 (metric sizes). - **Hardness:** Measured on the Shore A scale from 10 to 90 durometer based on application needs. - **Pressure Resistance:** Capable of sealing pressures up to 5,000 psi (34 MPa), depending on material and design. - **Temperature Range:** Varies by material, e.g., silicone works in extreme cold or heat, while Viton is suitable for high temperatures and chemical resistance. **Applications:** - Used across industries for sealing liquids and gases in: - Hydraulic systems - Pneumatic systems - Automotive engines - Aerospace components - Food processing equipment (FDA-approved materials) **Key Features:** - **Advantages:** - Inexpensive and reliable - Easy to produce and install - Available in various sizes and materials - **Performance:** - Effective in low-pressure static seals and high-pressure dynamic seals. - Resistant to extrusion under pressure when properly designed. **Standards Compliance:** - Common standards include: - AS568C for inch sizes - ISO 3601 for metric sizes - BS1806 for British metric sizes **Additional Features:** - Specialized O-rings include FDA-approved variants for food-grade applications or peroxide-cured types for medical use. Some are chemically inert or chlorinated for specific industries. **Conclusion:** O-rings are versatile components critical to sealing technologies across diverse industries.