dbde24e1-4012-47b6-8db4-e89ee4ca5a70 - Polypac

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Polypac PTFE Piston Seal

Polypac PTFE piston seals deliver low friction, superior chemical and wear resistance for hydraulic and pneumatic systems. Available in filled PTFE variants and custom sizes, backed by advanced testing and decades of sealing expertise.

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Product Details

Polypac PTFE Piston Seal — Reliable Sealing for Demanding Applications

Polypac PTFE piston seals are engineered for long life, low friction and dependable performance in hydraulic and pneumatic cylinders. Made from high-quality PTFE and a range of filled PTFE compounds (bronze, carbon, graphite, MoS₂ and glass filled), these piston seals provide stable sealing under tough conditions while minimizing stick-slip and wear.

Why choose PTFE piston seals?

Low friction: Smooth surface reduces energy loss and improves response in dynamic systems.
Excellent chemical resistance: PTFE resists oils, fuels, solvents and many aggressive media.
High wear resistance: Filled PTFE variants add mechanical strength and extend service life.
Broad temperature capability: Suitable for a wide range of operating temperatures and environments.
Minimal maintenance: Long-lasting materials reduce downtime and replacement frequency.

Materials & customization

Polypac offers standard PTFE and a selection of filled PTFE materials to match specific application needs. Common options include carbon-filled, bronze-filled, graphite-filled, MoS₂-filled and glass-filled PTFE. We also provide matching backup rings and tailored geometries to ensure optimal sealing performance for both new designs and retrofit projects.

Quality you can trust

Founded in 2008, Polypac combines extensive manufacturing experience with modern testing equipment and strong research partnerships. Our production facility spans over 10,000 square meters with advanced manufacturing and inspection tools. Every PTFE piston seal undergoes strict quality control and performance testing to ensure consistent dimensions, material integrity and sealing reliability.

Applications

Polypac PTFE piston seals are ideal for:

Hydraulic cylinders in construction and industrial machinery
Pneumatic actuators and control cylinders
Mobile equipment exposed to harsh fluids or temperatures
Specialized applications requiring chemical resistance and low friction

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Whether you need standard sizes or custom-engineered piston seals, Polypac delivers proven PTFE sealing solutions with professional support. Contact us to discuss material selection, drawings and testing requirements. Trust Polypac to keep your equipment running smoothly and reliably.

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Question you may concern

What does "AS568" mean?

AS568 is the Aerospace Standard that defines the dimensions for over 360 standard O-ring sizes. It is the most widely accepted sizing system in North America and globally. An AS568 number (e.g., AS568-214) specifies a precise inside diameter and cross-section.

How do I choose the right material for my sealing application?

Material selection depends on four key factors: Media: What fluid or gas will the seal contact? (e.g., petroleum oil, water, chemicals, steam) Temperature: What is the minimum and maximum operating temperature? Pressure: What is the system's operating pressure? Are there pressure spikes? Application: Is it a static, dynamic, or rotary seal? Example: NBR (Buna-N) is excellent for standard hydraulic oil, while FKM (Viton®) is needed for high temperatures or aggressive chemicals.

Can I reuse a seal?

We strongly recommend never reusing seals. Once compressed and used, a seal takes a "set" and its elastic properties are degraded. Reusing it almost always results in a leak. Always install a new seal during any maintenance or repair.

When should I use a spring-energized seal instead of a standard elastomeric seal?

Consider a spring-energized seal (e.g., GSF, SPN types) for demanding applications involving: Extreme Temperatures (below -30°C or above +200°C) Aggressive Chemicals that elastomers can't handle Very Low Leakage or "Zero Leakage" requirements Poor Lubricity or dry running conditions The internal spring maintains constant sealing force, compensating for wear and system variables.

About other questions pls contact me directily.

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PRODUCTS

dbde24e1-4012-47b6-8db4-e89ee4ca5a70

Polypac Industrial Technology Co.,Ltd

+86 189 2463 6168

rose@dmsseals.com

No. 5, Hegui Mid Road, Hegui Industrial Park, Lishui Town, Nanhai District, Foshan City, Guangdong Province, P.R. China.

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