What are the materials used for rubber hose fittings?

Rubber hose fittings are made from a variety of materials, mainly selected based on the application environment and the medium being transported. Common materials include nitrile rubber (NBR), ethylene propylene diene monomer (EPDM), neoprene rubber (CR), natural rubber (NR), fluororubber (FKM), and silicone rubber (SI).

Each material has its own characteristics and is suitable for different working conditions:

Nitrile rubber (NBR) has excellent oil resistance and is commonly used for transporting hydraulic oil, fuel oil, and other oily media. It is one of the most commonly used rubber materials in industrial hydraulic systems.

Ethylene propylene diene monomer (EPDM) is heat-resistant, ozone-resistant, and has strong weather resistance. It is suitable for high-temperature steam, hot water, and acid/alkali environments, and is widely used in building heating, cooling water systems, and automotive radiator piping.

Neoprene rubber (CR) has good aging resistance, seawater resistance, and flame retardant properties, making it suitable for hoses in marine, outdoor equipment, and fire protection systems.

Natural rubber (NR): Highly elastic and wear-resistant, but with poor oil resistance. It is primarily used in general applications such as low-pressure air and water transport, including agricultural irrigation hoses.

Fluororubber (FKM): Resistant to high temperatures and strong chemical corrosion, it operates stably from -5°C to 120°C. Suitable for high-end applications in aerospace and chemical industries, it is particularly well-suited for transporting extreme media such as strong acids, strong alkalis, and solvents.

Silicone rubber (SI): Offers an extremely wide temperature range (-80°C to 300°C) and good physiological inertness. Commonly used in food-grade hoses, medical equipment, and demanding automotive components.