Teflon ® Encapsulated O-Ring Material and Size Guide
Learn More About Teflon® Encapsulated O-Rings, Applications, and More
Teflon ® encapsulated o-rings and spring energized seals offer many performance benefits in demanding environments. FEP and PFA Teflon ® fluoropolymer shell delivers excellent chemical resistance with the energizing resiliency of a rubber elastomer core combines the best of both materials for o-rings with extreme chemical and temperature resistance.
Please reference our Teflon ® encapsulated o-ring material comparison chart and sizing capabilities guide. Teflon ® encapsulated o-rings are more stiff than solid rubber so can require special groove design considerations for optimal performance. Contact our responsive experts for engineering support.
Marco Rubber has many commonly used sizes of Teflon ® encapsulated o-rings in-stock, and custom sizes are made within a few weeks without tooling fees.
Seal (CPD#) | Seal | Relative Price | Highlight Features | Temperature | Pressure | Dynamic | Slow Dynamic | Excellent Chemical | Static |
FEP Encapsulated (T1002) |
| $ | Lowest Cost Most Readily Available | -80 o F To +400 o F PFA +500 o F | Up to | No | Yes | Yes | Yes |
FEP |
| $$ | Less Force Required to Compress | -80 o F To +400 o F PFA +500 o F | Up to | No | Yes | Yes | Yes |
FEP |
| $$ | Greater Chemical Resistance and Compression Set Resistance | -15 o F To +400 o F | Up to | No | Yes | Yes | Yes |
FEP |
| $$$ | Cryogenic Sealing Applications | -420 o F To +400 o F PFA +500 o F | Up to 3000 psi Vents | No | Yes | Yes | Yes |
Steel Spring Energized PTFE (Teflon ® ) Seal |
| $$$ | Extreme Temp Pressure Chemical Dynamic App Performance | -420 o F To +600 o F | Up to | Yes | Yes | Yes | Yes |
SOLID FFKM MARKEZ ® KALREZ ® |
| $$$ | Improved Sealing Performance Longer Seal Life | -50 o F To +620 o F | Up to With back-up ring | Yes | Yes | Yes | Yes |
FEP Encapsulated Silicone O-Rings | O-Ring with a FEP or PFA (Teflon®) outer layer encapsulating a Silicone core. The Teflon® shell offers excellent chemical and temperature resistance while the Silicone core provides the resiliency needed to provide effective sealing. Readily available in common USA and metric cross-sections and nearly unlimited diameters. CPD# T1002 is FEP encapsulated Solid Silicone with improved chemical resistance up to +400 o F. CPD# T1022 is PFA encapsulated Solid Silicone up to +500 o F. |
FEP Encapsulated Silicone Hollow Core
| O-Ring with a FEP (Teflon®) outer layer encapsulating a Hollow Silicone core. The Teflon® shell offers excellent chemical and temperature resistance while the Hollow Silicone core provides the resiliency needed to provide effective sealing. The hollow core requires less force to compress the seal resulting in easier installation and improved sealing performance in some applications. Readily available in common USA and metric cross-sections and nearly unlimited diameters. CPD# T1003 is FEP encapsulated Hollow Silicone with up to +400 o F. |
FEP Encapsulated FKM (Viton ® ) Core | O-Ring with a FEP (Teflon®) outer layer encapsulating a Solid FKM (Viton®) core. The Teflon® shell offers excellent chemical and temperature resistance while the FKM core provides the resiliency needed to provide effective sealing. The FKM core provides increased chemicals and compression set resistance resulting in longer lasting sealing in some applications. Readily available in common USA and metric cross-sections and nearly unlimited diameters. CPD# T1001 is FEP encapsulated Solid FKM with improved chemical resistance up to +400 o F |
FEP Encapsulated Steel Spring Core | O-Ring with a FEP (Teflon®) outer layer encapsulating Stainless Steel Spring. The Teflon® shell offers excellent chemical and temperature resistance while the Steel Spring core provides the resiliency needed to provide effective Cryogenic Seal performance down -420 o F. Readily available in USA and metric cross-sections and nearly unlimited diameters. CPD# T1021 is FEP encapsulated Steel Spring with Cryogenic Sealing down to -420 o F and up to +400 o F. PFA encapsulated steel spring up to +500 o F. |
Steel Spring Energized PTFE (Teflon ® ) Seals | PTFE (Teflon®) U-Cup style Lip Seal energized by a stainless steel spring. Spring Energized Teflon Seals provide the best chemical resistance, widest temperature and pressure performance ranges of any plastic or elastomeric seal. Spring Energized Teflon Seals can perform in Cryogenic Sealing temperatures of nearly absolute zero -420 o F to 600 o F. Pressures up to 3,000 psi and custom designs allow up to 60,000 psi. A wide range of high performance plastics are available for specific application performance. Designed for radial, face or custom seal configurations, as well as rotary, reciprocating and oscillatory motions depending on design. Low friction and long service life in demanding application. Wide range of spring energizing configurations based on applications. Seals are available in Rod and Piston Inside and Outside Pressure and unidirectional sealing configurations. Great performance in compressed gas waterless fracking seals, LPG and Liquid Nitrogen seals. Alternative to MSE® Seals, Bal Seals, Variseal®, OmniSeal®, FlexiSeal®. |
SOLID FFKM MARKEZ ® KALREZ ®
| O-Rings and Custom Molded FFKM MARKEZ® KALREZ® Seals provide the ultimate chemical, temperature and sealing performance in demanding applications that are worth investing in high performance high cost seals. Dozens of specialized compounds are available to maximize specific application performance temperatures to -50 o F and +620 o F |
COMMON APPLICATION
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ENCAPSULATED O-RING COMMON CROSS-SECTIONS AND DIAMETERS | ||||
O-Ring | O-Ring | Recommended | Minimum | Maximum |
0.070 +/- .005 | 1.78 | 0.017 | 0.500 | 10.000 |
0.075 +/- .005 | 1.91 | 0.018 | 0.500 | 10.000 |
0.094 +/- .005 | 2.40 | 0.022 | 0.600 | 15.000 |
0.103 +/- .005 | 2.62 | 0.024 | 0.600 | Unlimited |
0.110 +/- .005 | 2.79 | 0.025 | 0.600 | Unlimited |
0.118 +/- .005 | 3.00 | 0.025 | 0.750 | Unlimited |
0.125 +/- .006 | 3.18 | 0.025 | 0.750 | Unlimited |
0.139 +/- .006 | 3.53 | 0.025 | 0.750 | Unlimited |
0.148 +/- .006 | 3.76 | 0.027 | 0.950 | Unlimited |
0.157 +/- .007 | 3.99 | 0.027 | 1.150 | Unlimited |
0.177 +/- .007 | 4.50 | 0.031 | 1.500 | Unlimited |
0.197 +/- .008 | 5.00 | 0.035 | 1.500 | Unlimited |
0.210 +/- .008 | 5.33 | 0.038 | 1.500 | Unlimited |
0.225 +/- .008 | 5.72 | 0.040 | 1.500 | Unlimited |
0.250 +/- .010 | 6.35 | 0.043 | 2.500 | Unlimited |
0.275 +/- .010 | 6.99 | 0.043 | 2.500 | Unlimited |
0.295 +/- .010 | 7.49 | 0.047 | 2.750 | Unlimited |
0.315 +/- .012 | 8.00 | 0.050 | 3.000 | Unlimited |
0.331 +/- .012 | 8.40 | 0.057 | 4.000 | Unlimited |
