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Polypac Excavator Piston Seal — Reliable Hydraulic Performance

Polypac Excavator Piston Seal offers durable, leak-free hydraulic sealing for excavators. Made with advanced materials and precision production, it withstands harsh conditions and supports custom solutions for optimal performance.

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Product Details

Polypac Excavator Piston Seal — Overview

Polypac Excavator Piston Seal is designed to deliver reliable, long-lasting hydraulic sealing for excavators and other heavy equipment. Built from proven materials and manufactured with modern equipment, this seal reduces leakage, extends service life, and ensures smooth hydraulic operation under tough working conditions.

Key Features

- Durable materials: Available in PTFE blends and elastomers like NBR, FKM and EPDM for excellent wear and chemical resistance.
- Precision manufacturing: Produced in our 10,000+ m² facility with advanced testing to ensure consistent quality.
- Custom options: Tailored sizes and compounds to match specific pressure, temperature and contamination needs.
- Easy installation: Designed for tight tolerances and reliable fit in piston grooves.

Benefits for Users

- Reduced downtime: Longer seal life means fewer replacements and maintenance stops.
- Cost efficiency: Better sealing lowers hydraulic fluid loss and maintenance costs.
- Reliable performance: Consistent operation in mud, dust, heat and cold—ideal for construction and earthmoving tasks.
- Peace of mind: Polypac’s R&D partnerships with universities and labs ensure product safety and continual improvement.

Applications

Ideal for excavator cylinders, boom and arm pistons, and other heavy machinery where hydraulic sealing is critical. Suitable for high-pressure systems, frequent cycling, and environments with abrasive particles.

Why Choose Polypac

Founded in 2008, Polypac specializes in sealing materials and customized solutions. With extensive experience in filled PTFE and a wide range of O-ring materials, we combine laboratory-backed material development with large-scale production capacity. Customers benefit from fast customization, strict quality control, and responsive technical support.

Order & Support

Contact Polypac for sample testing, custom sizing, or volume quotes. We prioritize clear communication and tailor solutions so your equipment runs reliably. Let our seals protect your hydraulics and save you time and expense.

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FAQ

How important is surface finish on the metal parts that contact the seal?

Extremely important. A rough surface will abrade and wear out the seal quickly, causing leaks. A finish that is too smooth can prevent a lubricating film from forming. A typical recommended surface finish for dynamic applications is 0.2 to 0.8 μm (8-32 μin) Ra.

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 is the difference between a static seal and a dynamic seal?

A Static Seal is used between two surfaces that do not move relative to each other (e.g., pipe flanges, end caps). O-rings and gaskets are common static seals. A Dynamic Seal is used between surfaces that do move (e.g., piston and cylinder, rotating shaft). Rod seals, piston seals, and rotary shaft seals are designed for this purpose.

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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SPGW Piston Seal Kit | Bidirectional PTFE Seal with Anti-Extrusion Rings