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Polypac Industrial Piston Seals

Polypac Industrial Piston Seals deliver reliable, low‑friction sealing for hydraulic pistons. Built from advanced PTFE blends and elastomers, they offer long life, high temperature resistance and custom options for tough working conditions.

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Product Information

Reliable Piston Seals Built for Performance

Polypac Industrial Piston Seals are engineered to provide dependable sealing in hydraulic and pneumatic cylinders. Combining advanced filled PTFE compounds and High Quality elastomers, these seals minimize friction, reduce wear, and extend service life—keeping machinery running smoothly under demanding conditions.

Why Choose Polypac Piston Seals?

- Durable materials: Options include bronze-, carbon-, graphite-, MoS₂- and glass-filled PTFE for low friction and high wear resistance. Elastomer choices include NBR, FKM, silicone, EPDM and FFKM for broad chemical and temperature compatibility.
- Precision manufacturing: Our 10,000+ m² facility and state-of-the-art production and testing equipment ensure consistent quality and tight tolerances.
- Customized solutions: Polypac specializes in tailor-made seals for special working conditions, from extreme temperatures to aggressive fluids.
- Proven expertise: Founded in 2008, we evolved from PTFE expertise to a full range of sealing products while partnering with universities and research institutes for continuous improvement.

Key Benefits

Polypac piston seals deliver:

Low friction to improve energy efficiency and reduce heat build-up.
High wear and extrusion resistance for longer maintenance intervals.
Wide material selection for compatibility with hydraulic oils, fuels and additives.
Quick prototyping and production for OEM and aftermarket needs.

Applications and Support

Ideal for mobile hydraulics, industrial cylinders, construction equipment and any application requiring durable piston sealing. Polypac offers technical support, material selection guidance and custom tooling to match your design and operating requirements.

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Contact Polypac for sample evaluations, custom quotes, and rapid production lead times. Choose piston seals designed to lower lifecycle costs, boost reliability, and perform in the real world.

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FAQ

Why did my O-ring fail prematurely?

Common causes of O-ring failure include: Chemical Incompatibility: Swelling, softening, or cracking due to fluid exposure. Improper Sizing: Using an incorrect size leads to over-compression or inadequate sealing force. Abrasion: Wear and tear from rough surface finishes or contaminated fluid. Extrusion: The seal is forced into the gap between metal parts under high pressure. Installation Damage: Nicks, cuts, or twists during assembly.

How can I prevent seal damage during installation?

Use Tools: Always use dedicated installation tools (e.g., picks, cones, guides). Lubricate: Always lubricate the seal and the contact surface. Protect Sharp Edges: Cover sharp threads and edges with tape or use an installation sleeve. Check the Groove: Ensure the installation groove is clean, deburred, and undamaged.

What is the difference between NBR and FKM materials?

NBR (Nitrile/Buna-N): A general-purpose, cost-effective material with excellent resistance to petroleum-based oils and fuels. It has a standard temperature range of -30°C to +100°C (-22°F to +212°F). FKM (Fluoroelastomer/Viton®): A premium material with excellent resistance to high temperatures (up to 200°C+), chemicals, and oils. It is used in more severe environments but is more expensive than NBR.

What is the purpose of the metal spring in a rotary shaft seal?

The garter spring in a shaft seal (e.g., FSKR, SPGO types) provides a constant radial force on the sealing lip. This ensures consistent contact with the rotating shaft, compensating for minor wear, eccentricity, and vibration to prevent lubricant leakage.

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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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