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| | .gif) | Buna-N: These o-rings are the most commonly used because they exhibit excellent compression set, tear and abrasion resistance. These are used mainly in oil applications. Temperature range is –35° to +250° F. Meets SAE J200. | |
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| | .gif) | Viton: Viton is used when chemical and oil resistance is needed. These o-rings are especially good for hard vacuum service and low gas permeablility. The temperature range for these is –15° to +400° F. Meets SAE J200. | |
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| | .gif) | Silicone: Silicone has a good low and high temperature resistance. They are not recommended for dynamic applications due to their relatively poor tensile and tear strength. They exhibit the best low temperature flexibility of all orings and can be used in static applications to –150°. The normal temperature range is –65° to +450° F. It meets FDA 21CFR.177. | |
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| | .gif) | E-P: This o-ring is made from ethylene propylene and is used in applications requiring weather resistance. It also has excellent resistance to automotive brake fluids and steam. The temperature range is –65° to +212° F. Meets SAE J200. | |
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| | .gif) | Neoprene: Neoprene is used in applications requiring ozone resistance and Freon compatibility, making it ideal for use in refrigeration systems. The temperature range is –65° to +275° F. Meets SAE J200. | |
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| | .gif) | Aflas: This type of o-ring is unique in its resistance to petroleum products. It is also resistant to steam, phosphate esters and brake fluids. The temperature range for this material is –20° to +400° | |
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| | .gif) | Contoured: In contoured back-up rings, one face is straight and the opposite face is curved or contoured. The contoured face is the one that comes in contact with the o-ring, providing better grip and support. Back-up rings are washer-like devices that are used to prevent a seal from extruding through any gaps while under pressure. These seals are installed in the downstream side of the gland. Back-up rings are not seals themselves, but are usually used in conjunction with O-rings in high-pressure applications (over 1500 psi) for support or as spacers. | |
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| | .gif) | Single Turn: Also called "backup washers" these are used to reduce friction as the rubbing surface is coated with small particles of anti-frictional material. This type offers the best extrusion protection. Care must be used when installing to prevent shearing during assembly and gaps at the overlay should be avoided. | |
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| | .gif) | No Cut: Another form of a "backup washer," used to reduce friction. The solid features of the No Cut type generally requires two piece glands, but in larger sizes they can be fold-fitted with care into a rod groove or stretched over a piston groove and sized to correct for distortion. | |
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| | .gif) | Spiral Cut: The most popular version of the "backup washer" these are used to reduce friction as the rubbing surface is coated with small particles of anti-frictional material. This type offers some extrusion protection. Care must be used when installing to prevent shearing during assembly and gaps at the overlay should be avoided. | |
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| | .gif) | Quad Ring: The quad-ring provides an elastomer contact seal for the best leakage control available. The dual lobes of the minimize contact area and provide redundant sealing points. The quad-ring rides in an OD groove, which provides additional sealability, stability and lower friction. | |
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| | | Metric Buna-n: These o-rings are the most commonly used because they exhibit excellent compression set, tear and abrasion resistance. These are used mainly in oil applications. Temperature range is –35° to +250° F. Meets SAE J200. | |
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| | | Metric Viton: Viton is used when chemical and oil resistance is needed. These o-rings are especially good for hard vacuum service and low gas permeablility. The temperature range for these is –15° to +400° F. Meets SAE J200. | |
