Polypac NBR O-ring Bulk Kit Wholesale Pack
Polypac NBR O-ring Bulk Kit Wholesale Pack — Reliable Sealing Solutions
High Quality NBR O-rings in Bulk
Our NBR O-rings deliver consistent performance for oil, fuel and hydraulic systems. Manufactured from high-quality nitrile rubber, these O-rings provide excellent resistance to petroleum-based fluids, good abrasion resistance and reliable sealing across a broad temperature range. The NBR O-ring bulk kit wholesale pack is ideal for maintenance teams, distributors and OEMs who require dependable seals in volume.
Manufacturing Excellence and Capacity
Polypac is a scientific and technical hydraulic seal manufacturer and oil seal supplier with over a decade of focused experience. Our custom rubber ring and O-ring factory covers more than 10,000 m², including 8,000 m² of production space and advanced testing equipment. As one of China’s largest seal developers, we collaborate with universities and research institutes to refine materials and processes that meet demanding operating conditions.
Customizable Kits & Wholesale Benefits
Each wholesale pack can be tailored by size, cross-section, hardness (durometer) and packaging to match your inventory strategy. Bundled NBR O-ring kits reduce procurement complexity, lower per-unit costs and shorten downtime. Polypac supports private labeling and custom assortments for distributors and service providers seeking volume efficiency and consistent supply.
Proven Quality and Testing
Quality assurance is core to our offering. From our origins producing filled PTFE seals to today’s multi-material O-ring range (including FKM, EPDM, silicone and FFKM), Polypac uses industry-leading production and inspection equipment. Every batch undergoes dimensional checks, hardness testing and compound verification to ensure long-term sealing reliability in harsh environments.
Applications and Why Choose Polypac
Polypac NBR O-rings are optimized for hydraulic cylinders, pumps, valves, compressors and general maintenance kits. Choosing our NBR O-ring bulk kit wholesale pack means partnering with a manufacturer that understands engineering demands and offers scalable supply, technical support and rapid customization. Contact Polypac today to specify kits that reduce downtime and improve sealing performance.
NBR O-ring bulk kit wholesale pack 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.
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.
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.
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.
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