Custom Rubber Rings Flat Seal Washers Factory China Leading Suppliers

High-performance rubber rings flat seal washers from a certified China factory. Professional suppliers of FKM, Silicone, and NBR seals for thermos and industrial use. ISO9001 certified with custom sizes and global shipping.

SupplierShijiazhuang Beike Sealing Technology Co.,Ltd.www.beikesealing.com

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About this product

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Our high-performance Rubber Rings Flat Seal Washers are precision-engineered for thermos and container sealing applications, ensuring a leak-proof vacuum and superior thermal insulation. Available in premium FKM, Silicone, and NBR materials, these flat seals are designed to withstand extreme temperature fluctuations and chemical exposure, making them indispensable for high-quality beverage containers and industrial equipment.

By leveraging advanced molding formulas, we provide seals that combine exceptional tensile strength with superior compression recovery. Whether you require standard ISO/AS568 sizes or fully customized dimensions, our rubber gaskets deliver a reliable, airtight seal that prevents leakage and extends the lifespan of your products across medical, food-grade, and industrial sectors.

Detailed Parameters

Available Materials	FKM, Silicone, NBR (Nitrile)	Hardness Range	30-90 Shore A
Size Standard	AS568, ISO3601, JIS or Customized	Tensile Strength	200 - 3000 PSI (Material dependent)
Elongation Max	600% - 700%	Temperature (Silicone)	-60°F to 450°F
Temperature (NBR)	-40°F to 250°F	Compression Set	Excellent / Good
Oil Resistance	Excellent (NBR/FKM), Fair (Silicone)	Application	Thermos, Chemical, Medical, Food Industry

Key Advantages

Extreme Durability

Enhanced formulas provide tensile strength up to 1500 psi and tear resistance up to 88 LBS for long-term use.

Thermal Stability

Superior heat and cold resistance, maintaining seal integrity from cryogenic levels up to 450°F.

Perfect Elasticity

Excellent compression deformation recovery ensures a tight, leak-proof seal over thousands of cycles.

Chemical Resistance

High resistance to ozone, oxides, and neutral solvents, preventing degradation in harsh environments.

Precision Fitting

Strict adherence to AS568, ISO3601, and JIS standards for seamless integration with your hardware.

Material Versatility

Available in Food Grade Silicone for safety and NBR for superior oil and water resistance.

Product Gallery

Management Platforms

Rapid Prototyping

Fast turnaround for customized samples to validate fit and performance before bulk production.

Custom Molding

Professional mold design based on your drawings or physical samples for precise specifications.

Inventory Control

Stocking programs available for annual requirements to ensure prompt, zero-delay shipment.

Quality Assurance

Rigorous testing for hardness, tensile strength, and compression set on every batch.

Flexible Logistics

Global shipping via Express, Air, or Sea with customized packaging options for safety.

Technical Support

Expert guidance on material selection (NBR vs Silicone vs FKM) based on your operating environment.

Investment Return Comparison

Performance Metric	Standard Rubber Seal	Our Premium Rubber Seal	Business Impact
Seal Lifespan	6-12 Months	24-48 Months	Lower Replacement Costs
Leakage Rate	Moderate	Ultra-Low	Higher Product Quality
Temp. Resistance	Limited Range	Extreme (-60°F to 450°F)	Wider Market Application
Compression Set	High Deformation	Excellent Recovery	Consistent Airtightness
Maintenance Cost	Frequent Replacement	Minimal Maintenance	Increased End-User ROI

Frequently Asked Questions

Q: Which material is best for a food-grade thermos seal?

For food-grade applications, Silicone is the best choice due to its non-toxic nature, FDA compliance, and excellent heat resistance, ensuring safety and longevity for beverage containers.

Q: Can you manufacture rubber flat seals based on a physical sample?

Yes, we welcome drawings, photos, and physical samples. Our engineering team can reverse-engineer the specifications to produce an exact match or an improved version of your seal.

Q: What is the difference between NBR and Silicone for sealing?

NBR (Nitrile) offers superior oil and fuel resistance and better abrasion resistance, while Silicone provides much wider temperature stability and is safer for food/medical contact.

Q: What are the typical lead times for custom rubber parts?

Stock items ship in 5-7 days. Custom orders with new molds typically take 25-35 days, while custom orders using existing molds take 10-20 days.

Q: Do you provide free samples for testing?

Yes, free samples are available to ensure the material and size meet your technical requirements before placing a bulk order.

Q: Which industrial standards do your rubber rings follow?

We manufacture according to AS568, ISO3601, and JIS standards, ensuring global compatibility for our rubber parts across the chemical, petroleum, and medical industries.