FEP/PFA Encapsulated O-Rings combine the elasticity and sealing capabilities of rubber with the chemical resistance of Teflon. They consist of a silicone or fluororubber core encased in a relatively thin layer of Teflon FEP or Teflon PFA.
These O-rings offer excellent resistance to friction, swelling, high pressure, and compression set. They provide superior sealing stability, significantly reducing equipment leakage and the frequency of part replacements, making them suitable for sealing applications in industries such as manufacturing, food processing, pharmaceuticals, and aerospace.
Material: Teflon FEP and Teflon PFA are chemically similar, but Teflon PFA offers superior high-temperature resistance compared to Teflon FEP.
Teflon FEP Encapsulation: -60°C to 205°C (can withstand 260°C for short periods)
Teflon PFA Encapsulation: -60°C to 260°C (can withstand 300°C for short periods)
1. Outstanding chemical resistance; compatible with almost all chemical media
2. Wide operating temperature range
3. Good compression resistance
4. Low friction
5. Excellent resistance to swelling
6. High-pressure resistance
7. Superior sealing durability and long service life
Pumps and valves, reaction vessels, mechanical seals, filters, pressure vessels, heat exchangers, boilers, pipe flanges, gas compressors, etc.
Chemical processing, aircraft manufacturing, pharmaceuticals, oil and chemical transport, petroleum refining, film manufacturing, refrigeration engineering, food processing, papermaking, dye manufacturing, paint spraying, etc.
|
Wire diameter d |
A(mm) |
B(mm) |
||
|
Static seal |
Dynamic seal |
Pneumatic seal |
||
|
1.78 |
2.36/2.49 |
1.42/1.52 |
1.55/1.60 |
1.63/1.65 |
|
2.62 |
3.56/3.68 |
2.08/2.21 |
2.29/2.36 |
2.39/2.44 |
|
3.53 |
4.75/4.88 |
2.82/3.00 |
3.10/3.18 |
3.22/3.28 |
|
5.33 |
7.14/7.26 |
4.27/4.52 |
4.67/4.80 |
4.90/4.95 |
|
6.99 |
9.63/9.65 |
5.59/5.89 |
6.15/6.27 |
6.43/6.48 |
1. Surfaces where the encapsulated O-ring is installed or makes contact must be smooth and free of burrs, grooves, or sharp edges. The surface roughness of the bore should be 1.6 μm, and that of the shaft should be 0.8 μm.
2. Apply clean, light oil or grease to lubricate the surface of the encapsulated O-ring and the mating surfaces.
3. If installation onto the shaft is difficult, soak the O-ring in hot water for a few minutes to allow it to expand; this softens and expands the ring, making installation easier. Installing the O-ring while it is warm allows it to return to its original dimensions upon cooling.
4. Avoid bending the encapsulated O-ring excessively, as this may cause the Teflon coating to wrinkle, thereby impairing performance.
Recommended compression rates for encapsulated O-rings are as follows:
Static sealing: 15%–20%
Dynamic sealing: 10%–12%
Pneumatic applications: 7%–8%
Actual compression should be determined based on operating conditions, particularly factors such as the working pressure of the seal.
Address
No.1 Ruichen Road, Dongliuting Industrial Park, Chengyang District, Qingdao City, Shandong Province, China
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