PTFE 2 / 3 Fold Backup Ring / PTFE Backup Ring

A PTFE (Polytetrafluoroethylene) 2 / 3 -fold backup ring is a type of sealing component used in hydraulic and pneumatic systems to prevent leakage of fluid or gas between dynamic sealing elements, such as O-rings or piston seals. Backup rings are typically installed in conjunction with primary seals to provide additional support and prevent extrusion or damage under high-pressure conditions.

1. Material: PTFE is a synthetic polymer known for its excellent chemical resistance, low friction coefficient, and wide temperature range. PTFE backup rings are made from high-quality PTFE material, ensuring compatibility with various hydraulic fluids, gases, and operating conditions.

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3. Design: A 2-fold backup ring has a double-walled design, consisting of two PTFE lips folded back on each other. This configuration provides enhanced support and stability compared to single-fold backup rings, reducing the risk of extrusion and increasing sealing effectiveness.

4. A 3-fold backup ring has a triple-walled design, consisting of two PTFE lips folded back on each other.

Advantages:

• 1. Excellent chemical resistance: PTFE backup rings are resistant to a wide range of chemicals, including acids, bases, solvents, and oils.
• 2. Low friction: PTFE material has a low coefficient of friction, reducing wear and frictional heat generation between sealing surfaces.
• 3. Wide temperature range: PTFE backup rings can withstand extreme temperatures, from cryogenic conditions to high temperatures, without compromising sealing performance.
• 4. Long service life: PTFE material is highly durable and resistant to wear, ensuring extended service life and reduced maintenance requirements.