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

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Polypac Mobile Equipment Seals

Polypac Mobile Equipment Seals provide reliable hydraulic and oil sealing for heavy-duty mobile machinery. Custom PTFE and elastomer O-rings (NBR, FKM, FFKM) with advanced testing and OEM support ensure long service life and dependable performance.

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Product Information

About Polypac Mobile Equipment Seals

Polypac Mobile Equipment Seals are engineered for demanding on‑road and off‑road machines — excavators, loaders, cranes, agricultural and construction equipment. Founded in 2008, Polypac combines advanced production, rigorous testing, and a large custom rubber ring and O‑ring factory to deliver seals you can trust.

Key Features & Benefits

Reliable Performance

Designed to resist oil, dirt, vibration and extreme pressure, our seals minimize leakage and downtime. Low friction PTFE variants and engineered elastomers keep systems efficient and responsive under continuous use.

Durability & Long Service Life

Using filled PTFE (bronze, carbon, graphite, MoS₂, glass) and high‑quality elastomers (NBR, FKM, EPDM, silicone, FFKM), Polypac seals withstand wear, abrasion and temperature swings — reducing maintenance frequency and lifecycle cost.

Materials & Applications

We supply a wide range of materials to match application needs: bronze‑filled and carbon‑filled PTFE for heavy sliding loads; MoS₂ and graphite‑filled PTFE for extreme friction control; and molded O‑rings in NBR, FKM, EPDM, silicone and FFKM for fluid compatibility and chemical resistance. Typical applications include hydraulic cylinders, piston and rod seals, axle and gearbox seals, and general oil sealing for mobile equipment.

Custom Solutions & Quality Assurance

Polypac’s factory covers over 10,000 m² with 8,000 m² of production space and industry‑leading testing equipment. We work closely with universities and research institutes to develop new materials and tailor seals for special working conditions. Custom sizes, compounds and tolerances are available for OEM and aftermarket customers.

Why Choose Polypac

Polypac offers decades of seal manufacturing expertise, advanced materials, and a commitment to quality. Our seals are built to reduce leaks, extend equipment life, and give operators confidence in the field. Contact Polypac for samples, technical support, or custom sealing solutions tailored to your mobile equipment.

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FAQ

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.

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.

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.

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.

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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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