Hydraulic Wiper Seal Solutions by Polypac
Hydraulic Wiper Seal Solutions by Polypac
High-Performance Features
Polypac Hydraulic Wiper Seal is engineered to protect hydraulic cylinders from contamination while preserving system reliability. Designed for minimal friction, superior debris exclusion, and long service life, our wiper seals reduce downtime and maintenance costs for mobile and industrial hydraulics.
Materials and Compatibility
We offer Hydraulic Wiper Seal constructions in filled PTFE variants (bronze, carbon, graphite, MoS2, glass) and elastomers including NBR, FKM, EPDM, silicone, and high-performance FFKM. Material selection is optimized for media compatibility, temperature range, and abrasion resistance to match your application requirements.
Custom Manufacturing and Sizes
Polypac provides custom Hydraulic Wiper Seal solutions from our 10,000 m2 facility with 8,000 m2 of production space. Precise tooling and flexible compound development allow tailored profiles, sizes, and tolerances for specialized rod diameters, retraction speeds, and surface finishes.
Rigorous Quality and Testing
Our advanced production and testing equipment ensure consistent dimensional accuracy, hardness control, and material performance. Long-term collaboration with universities and research institutions supports accelerated aging, abrasion, and sealing tests that validate seal life under harsh conditions.
Applications and Industries
Polypac Hydraulic Wiper Seal is used across construction, agriculture, mining, marine, and industrial automation. Ideal for off-highway equipment, hydraulic presses, and high-cycle actuators where contamination exclusion and rod protection are critical.
Why Choose Polypac
Founded in 2008, Polypac combines deep materials expertise with scalable production. As one of China’s leading seal manufacturers, we deliver fast prototyping, competitive pricing, and certified quality. Choose Polypac for dependable Hydraulic Wiper Seal solutions that extend service intervals and improve system uptime.
Hydraulic Wiper Seal Display
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.
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 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.
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.
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