FDA Food Grade O-Rings NBR/HNBR/VITON/FLS/NR/ACM Medical Grade

Company Introduction:

Bomingyang Technology Co., Ltd., located in Xi'an, Shaanxi Province, is a technology-based enterprise integrating the R&D, production, and sales of rubber seals. The company mainly produces various rubber seals such as O-rings, X-rings, Y-rings, flat washers, V-rings, ED rings, C-rings, rubber strips, rubber balls, rubber retaining rings, and miscellaneous rubber parts.

1. NBR Rubber Seals
Suitable for use with petroleum-based hydraulic oils, glycol-based hydraulic oils, diester-based lubricants, gasoline, water, silicone grease, silicone oil, and other media. It is currently the most widely used and cost-effective rubber seal. Not suitable for polar solvents such as ketones, ozone, nitro hydrocarbons, MEK, and chloroform. General operating temperature range: -40~120°C.

2. HNBR Hydrogenated Rubber Seals
Excellent resistance to corrosion, tearing, and compression deformation, with good ozone, sunlight, and weather resistance. Offers better wear resistance than rubber. Suitable for washing machinery, automotive engine systems, and refrigeration systems using the new environmentally friendly refrigerant R134a. Not recommended for use in alcohols, esters, or aromatic solutions. General operating temperature range: -40~150°C.
3. SIL Silicone Rubber Seals
Excellent heat, cold, ozone, and atmospheric aging resistance. Good insulation properties, but tensile strength is poorer than general rubber and not oil-resistant. Suitable for household appliances such as electric water heaters, irons, and microwave ovens. Also suitable for various products in contact with the human body, such as kettles and water dispensers. Not recommended for most concentrated solvents, oils, strong acids, and alkalis. General operating temperature range: -55~250°C.
4. VITON Fluorocarbon Rubber Seals
Superior high-temperature resistance compared to silicone rubber, with excellent weather, ozone, and chemical resistance. Poor cold resistance. Resistant to most oils and solvents, especially acids, aliphatic hydrocarbons, aromatic hydrocarbons, and animal/vegetable oils. Suitable for diesel engines, fuel systems, and sealing needs in chemical plants. Not recommended for ketones, low molecular weight esters, and nitrated mixtures. General operating temperature range: -20~250°C.
5. FLS Fluorosilicone Rubber Seals
Combines the advantages of fluorocarbon and silicone rubber, with excellent oil, solvent, fuel resistance, and high/low-temperature performance. Resistant to oxygenated compounds, aromatic solvents, and chlorinated solvents. Generally used in aviation, aerospace, and military applications. Not recommended for ketones and brake fluids. General operating temperature range: -50~200°C.
6. EPDM Ethylene Propylene Diene Monomer Rubber Seals
Excellent weather, ozone, water, and chemical resistance. Can be used with alcohols and ketones, and is suitable for high-temperature steam environments. Applicable in bathroom equipment, automotive radiators, and brake systems. Not recommended for food applications or mineral oils. General operating temperature range: -55~150°C.

7. CR Neoprene Rubber Seals
Exceptional sunlight and weather resistance. Resistant to dilute acids and silicone-based lubricants but swells significantly in low aniline point mineral oils. Prone to crystallization and hardening at low temperatures. Suitable for environments exposed to atmosphere, sunlight, ozone, and various flame-resistant and chemically corrosive sealing applications. Not recommended for strong acids, nitro hydrocarbons, esters, chloroform, or ketones. General operating temperature range: -55~120°C.
8. IIR Butyl Rubber Seals
Excellent gas tightness, heat, sunlight, and ozone resistance, with good insulation properties. Highly resistant to polar solvents such as alcohols, ketones, and esters. Can be used with animal/vegetable oils or oxidizable media. Suitable for chemical resistance or vacuum equipment. Not recommended for use with petroleum solvents, kerosene, or aromatic hydrocarbons. General operating temperature range: -50~110°C.
9. ACM Acrylic Rubber Seals
Excellent oil resistance, high temperature, and weather resistance, but with slightly lower mechanical strength, compression set, and water resistance. Generally used in automotive transmission and power steering systems. Not suitable for hot water, brake fluid, or phosphate esters. General operating temperature range: -25~170°C.
10. NR Natural Rubber Seals
Rubber products offer good wear resistance, elasticity, tensile strength, and elongation. However, they are prone to aging in air, become sticky when heated, and swell or dissolve in mineral oils or gasoline. Resistant to alkalis but not strong acids. Suitable for use in automotive brake fluids, ethanol, and other liquids containing hydroxide ions. General operating temperature range: -20~100°C.
11. PU Polyurethane Rubber Seals
Polyurethane rubber has excellent mechanical properties, with wear and high-pressure resistance far superior to other rubbers. Good aging, ozone, and oil resistance, but prone to hydrolysis at high temperatures. Generally used in high-pressure and wear-resistant sealing applications, such as hydraulic cylinders. General operating temperature range: -45~90°C.
12. Metal Rubber Seals
Made from stainless steel wire without any rubber components, offering strong performance characteristics. For example, they can operate normally in high vacuum, extreme temperatures, strong radiation, and various corrosive environments. The seal surface is made from materials such as stainless steel, copper, or PTFE depending on the application, with metal rubber components as the core, offering high sealing strength, effectiveness, and reusability. The core is made from metal wires of different diameters and densities, suitable for various pressure conditions. General operating range: -80~800°C. These seals are relatively expensive due to high costs, but their excellent performance and wide range of applications are widely recognized.

After-Sales Service:
All company products come with material certification; sincerity wins trust, patience gains understanding; details determine success, service creates value. Service must be integrated throughout the entire enterprise, not limited to after-sales. Customized packaging and shipping methods are available based on customer requirements, meeting different cleanliness standards for products. Whenever you need, we are ready to provide satisfactory products. If we have the honor to become your supplier, you can rest assured about professionalism, quality, delivery, and service. Cooperating with us will make us a hassle-free and reliable qualified supplier.