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Polypac Nitrile O-Ring Kits — Reliable NBR Seals for Hydraulic & Oil

Polypac Nitrile O-Ring Kits provide reliable NBR O-rings for hydraulic and oil sealing. Manufactured with strict quality control, wide size range, and custom options for demanding conditions.

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Product Information

Polypac Nitrile O-Ring Kits: Durable NBR Seals You Can Trust

Polypac Nitrile O-Ring Kits deliver dependable sealing solutions for hydraulic systems, oil applications, and general industrial use. Made from high-quality NBR (nitrile butadiene rubber), these O-rings resist oil, fuel, and most hydraulic fluids while offering excellent compression set resistance and long service life.

Why Choose Polypac Nitrile O-Ring Kits?

Proven reliability: Polypac is a specialist in hydraulic seals and oil seals, with a factory covering over 10,000 m² and advanced production and testing equipment.
Wide material knowledge: We produce seals in NBR, FKM, silicone, EPDM, and FFKM; our nitrile O-rings are formulated for stability in oil and hydraulic environments.
Tight quality control: Every kit undergoes dimensional checks and material testing to ensure consistent performance.

Features and Benefits

Comprehensive sizes: Kits include a broad range of standard O-ring sizes to fit pumps, valves, cylinders, and fittings, reducing downtime.
Excellent oil resistance: Nitrile O-rings resist petroleum oils and hydraulic fluids, making them ideal for oil seal and hydraulic seal needs.
Temperature range: Suitable for common operating temperatures in industrial and mobile hydraulic systems.
Cost-effective and ready-to-use: Convenient kit packaging makes repairs and maintenance faster and easier.

Custom Options and Technical Support

Polypac offers custom rubber ring and O-ring manufacturing for special working conditions. Our team works with universities and research institutes to develop sealing compounds and optimized designs. If you need non-standard sizes or a specific hardness, Polypac can produce tailored NBR O-rings to meet your application requirements.

Applications

Common uses include hydraulic cylinders, pumps, valves, motors, compressors, and general oil sealing tasks across automotive, industrial, and agricultural sectors.

Buy with Confidence

Choosing Polypac Nitrile O-Ring Kits means selecting a proven manufacturer with years of experience in seal production and material development. Our kits are designed to minimize leaks, extend equipment life, and simplify maintenance. For custom solutions or bulk orders, contact Polypac to discuss your sealing needs and material recommendations.

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FAQ

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.

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.

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.

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.

About other questions pls contact me directily.

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PRODUCTS

dbde24e1-4012-47b6-8db4-e89ee4ca5a70

Polypac Industrial Technology Co.,Ltd

+86 189 2463 6168

rose@dmsseals.com

No. 5, Hegui Mid Road, Hegui Industrial Park, Lishui Town, Nanhai District, Foshan City, Guangdong Province, P.R. China.

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