Viton (FKM) Piston Rod Seal — High-Performance Hydraulic Sealing by Polypac
Viton (FKM) piston rod seal — Reliable sealing for demanding hydraulics
High Quality material performance
Polypac’s Viton (FKM) piston rod seal is engineered from advanced FKM elastomers to offer superior resistance to high temperatures, fuels, oils and aggressive chemicals. The material resists hardening and swelling in harsh environments, ensuring long service life and consistent sealing performance in mobile and industrial hydraulic systems.
Designed for precision and durability
Each Viton (FKM) piston rod seal features optimized lip geometry and reinforcement options to minimize extrusion and wear. Precision molding and tight dimensional control reduce leakage and friction, improving cylinder efficiency and reducing maintenance intervals — critical for heavy-duty applications such as construction equipment, marine hydraulics and chemical processing plants.
Customized solutions for special conditions
Polypac specializes in custom sealing solutions. From tailored cross-sections to composite constructions combining FKM with PTFE or fabric reinforcements, we design piston rod seals to meet unique pressure, speed and temperature requirements. Our R&D collaboration with universities enables material and design innovations for special working conditions.
Manufacturing excellence and testing
With over 10,000 m² of facility space and industry-leading production/testing equipment, Polypac ensures consistent quality across production batches. Every Viton (FKM) piston rod seal undergoes dimensional inspection, hardness verification and performance testing to meet international sealing standards.
Why choose Polypac
Founded in 2008, Polypac combines decades of expertise in PTFE-filled components and elastomer seals. As a leading hydraulic seal manufacturer and oil seal supplier, we offer fast prototyping, scalable production and global technical support — delivering reliable Viton (FKM) piston rod seals tailored to your application.
Applications and benefits
Ideal for high-temperature, chemically aggressive and high-pressure hydraulic systems, our Viton (FKM) piston rod seals reduce downtime, extend component life and protect critical equipment. Contact Polypac for material selection, custom tooling and performance validation to optimize your sealing solution.
Viton (FKM) piston rod seal Display
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.
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.
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.
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.
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