Hangzhou Bright Rubber Plastic Product Co., Ltd. is one of the leading manufacturers and suppliers of rubber/ epdm/ silicon/ fkm o ring seals in China. If you're going to buy rubber/ epdm/ silicon/ fkm o ring seals made in China, welcome to get more information from our factory. We also accept customized orders.
Product Description
O ring seals are indispensable components in industrial, automotive, aerospace, and daily-use equipment, delivering reliable leak-proof performance and structural protection. Our rubber O ring seals, available in EPDM, Silicone, and FKM materials, are precision-manufactured to meet diverse sealing demands across extreme environments and application scenarios. Crafted with premium raw materials and advanced molding technology, these seals blend flexibility, durability, and chemical resistance, serving as core parts for maintaining equipment integrity and operational efficiency.
We offer a comprehensive range of O ring materials, each engineered to excel in specific conditions. EPDM (Ethylene Propylene Diene Monomer) O rings stand out for their exceptional weatherability, ozone resistance, and thermal stability, operating efficiently between -40°C to 150°C. Ideal for outdoor, plumbing, and HVAC applications, EPDM seals resist water, steam, and most polar solvents, making them a top choice for automotive cooling systems and architectural sealing projects.
Silicone O rings are celebrated for their superior temperature tolerance (-60°C to 230°C) and biocompatibility, making them suitable for medical, food, and beverage industries. These seals exhibit excellent flexibility and compression set resistance, ensuring consistent performance in both high-heat and low-temperature environments. Unlike other rubbers, silicone is non-toxic and odorless, complying with strict FDA standards for direct food contact and medical device applications such as syringe gaskets and sterilization equipment.
FKM (Fluorocarbon Rubber), commonly known as Viton®, is a high-performance material designed for harsh chemical and high-temperature environments. With a temperature range of -20°C to 200°C (and up to 230°C for short periods), FKM O rings resist fuels, oils, acids, and halogenated solvents-critical for automotive fuel systems, chemical processing plants, and aerospace equipment. Their exceptional mechanical strength and wear resistance ensure long service life in high-pressure and corrosive settings, reducing maintenance costs and downtime.
Rubber O Ring
--We have various rubber O-rings, such as NBR, EPDM, SIL, FKM, ACM, CR, HNBR, FVMQ, etc.
--Our usual colors are black, white, brown, red, green, blue and yellow.
--We can also customize the color according to the color number.
--We can provide any hardness in the range of 10-90 Shore A.
Beyond material diversity, our O ring seals feature precision engineering for universal适配. Available in standard sizes (complying with AS568, ISO 3601) and custom dimensions, they offer seamless fitment for different grooves and assemblies. Each O ring undergoes precision molding to ensure uniform cross-section, smooth surface, and tight dimensional tolerance, enabling easy installation and reliable sealing without leakage. The circular design provides 360° contact pressure, adapting to dynamic and static applications such as rotating shafts, hydraulic cylinders, and pipe connections.
Quality control is integrated into every production stage. From raw material testing (to verify purity and performance) to molding, curing, and post-processing, each seal is inspected for compression set, tensile strength, and chemical resistance. Our products comply with international standards including RoHS, REACH, and FDA, ensuring safety and compatibility for global applications. Customization options are available, including color matching, hardness adjustment (30-90 Shore A), and special coatings for enhanced lubricity or wear resistance.
Whether for industrial machinery, automotive systems, medical devices, or household appliances, our EPDM, Silicone, and FKM O ring seals deliver tailored sealing solutions. We combine material expertise with precision manufacturing to provide seals that withstand extreme conditions, ensure operational safety, and optimize equipment performance. Trust our premium O ring seals to deliver consistent, leak-proof results in your most demanding applications.
1. Rubber O-ring Introduction
It is rubber ring with O-shaped cross section, it has high elasticity, insulation and long service life.
It is easy to manufacture, inexpensive and reliable, so it is commonly used in machinery manufacturing,
automotive,electrical, medical and other industries,and plays the role of sealing, insulation, cushioning,
fixing, etc. Therefore, rubber O-ring is one of the most commonly used seals in global machinery.
2. Raw Material Selection
Rubber O-ring has a variety of raw materials. Different materials have different properties and prices.
The order of material prices is: NBR We should choose the appropriate material according to its use environment.
The following table is the main characteristics of the material. If you want to know more about a
material, please feel free to contact us.
| Rubber | Characteristic | Application |
| NBR | Oil resistance | Oil tank, lubricating oil tank, mechanical equipment, use environment without special requirements |
| EPDM | Strong water and steam tightness | Water pump, bathroom, automobile brake system |
| SIL | Good elasticity, wide temperature range, wide practicability | Electronics, food and medical industry |
| FKM | High temperature resistance, chemical resistance | Automobile engine, fuel system, mechanical equipment of chemical plant |
| ACM | High temperature resistance (weaker than FKM) | Automobile engine, fuel system |
| HNBR | Low temperature resistance | Air conditioning and refrigeration industry |
| CR | Flame retardancy | Ozone environment, flame retardant products |
| FVMQ | All performance is excellent | Aerospace, high-end automobile and other high-end fields |
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