High-Performance Machinery Seal Solutions by Polypac
High-Performance Machinery Seal Solutions by Polypac
Why Choose Polypac High-Performance Machinery Seals
Polypac specializes in High-Performance Machinery Seal products designed to extend service life, reduce maintenance, and improve reliability across hydraulic and mechanical systems. Founded in 2008, Polypac combines scientific R&D with industrial scale manufacturing to supply oil seals, hydraulic seals, and custom sealing solutions that meet demanding operating conditions.
Advanced Materials & Customization
Polypac offers a broad materials portfolio—bronze-, carbon-, graphite-, MoS₂-, and glass-filled PTFE—alongside elastomers including NBR, FKM, silicone, EPDM, and FFKM. Our custom rubber ring and O-ring factory (over 10,000 m², 8,000 m² production space) supports tailored geometry, compound formulation, and material selection to optimize sealing performance for temperature, pressure, speed, and chemical exposure.
Applications & Performance
Our High-Performance Machinery Seal range is engineered for hydraulics, pumps, compressors, heavy machinery, and rotating equipment. Products minimize friction, resist extrusion and wear, and maintain sealing integrity under high pressure, high temperature, abrasive media, and aggressive chemicals—delivering predictable performance and lower total cost of ownership.
Manufacturing Capacity & Quality Assurance
Polypac’s production and testing equipment are among the most advanced in the industry. As one of China’s leading seal manufacturers, we maintain long-term collaborations with universities and research institutes to validate materials and develop next-generation seals. Rigorous testing—dimensional control, material analysis, life-cycle and leakage tests—ensures consistent quality from prototype to mass production.
Ordering, Technical Support & Rapid Delivery
We provide end-to-end service from specification review and rapid prototyping to volume manufacturing and aftermarket support. Polypac’s technical team assists with material selection, custom designs, and installation guidance. Contact us for samples, custom quotes, and application-specific recommendations to deploy reliable High-Performance Machinery Seal solutions quickly.
High-Performance Machinery Seal Display
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.
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 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.
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.
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.
Are PTFE seals a good choice for vacuum and cryogenic uses?
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