UL Wiper Seal: Reliable Protection for Hydraulic Systems
UL Wiper Seal: Reliable Protection for Hydraulic Systems
Why Choose Polypac UL Wiper Seal
Polypac's UL Wiper Seal is engineered to keep contaminants out of hydraulic cylinders and extend the life of rod seals and bearings. Since 2008 we have specialized in high-performance sealing solutions—combining scientific research, advanced production lines and industry-leading testing to deliver wipers that meet stringent reliability demands. Choosing a UL Wiper Seal from Polypac means selecting a partner with a 10,000+ m² facility, expert R&D collaborations and a record of supply to demanding industrial applications.
Materials & Compatibility
Our UL Wiper Seal range is available in multiple compounds for optimized compatibility: carbon- and bronze-filled PTFE variants, MoS₂ and graphite-filled PTFE for low-friction environments, and elastomers such as NBR, FKM, EPDM, silicone and FFKM for chemical resistance and temperature extremes. Material selection for each UL Wiper Seal is driven by fluid type, pressure, temperature and surface finish to ensure reliable wiping performance and minimal rod wear.
Custom Manufacturing & Precision Testing
Polypac's custom rubber ring and O-ring factory covers more than 10,000 m² with 8,000 m² of production space. We offer tailored UL Wiper Seal geometries and tolerances for unique cylinders and special conditions. Our advanced production and testing equipment enable dimensional control, abrasion testing and endurance trials—delivering consistent quality and traceability for every batch.
Applications & Performance Benefits
UL Wiper Seal solutions are ideal for hydraulic and pneumatic systems across mobile equipment, industrial presses, marine hydraulics and high-cycle automation. Key benefits include superior contamination exclusion, reduced maintenance intervals, decreased rod scoring and enhanced system uptime. Our designs focus on effective debris shedding, minimal friction and reliable sealing even under variable loads.
Ordering, Support & Certification
Polypac offers fast prototyping, volume production and engineering support for integrating UL Wiper Seal into new or retrofit systems. We maintain long-term collaborations with universities and research institutions to stay at the forefront of seal technology. Contact Polypac for material recommendations, custom quotes and testing data to ensure the UL Wiper Seal you receive matches your performance requirements.
UL Wiper Seal Display
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.
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 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.
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.
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