✅ Main features of NBR gaskets:

1. Excellent oil resistance

NBR is one of the best materials resistant to mineral oil, lubricating oil and fuel among all general rubbers. It is not easy to swell or decompose in media such as gasoline, diesel, hydraulic oil and grease, and is very suitable for sealing applications in oil-containing environments such as engines, fuel tanks, pumps and valves.

2. Good mechanical strength and wear resistance

Nitrile rubber has high tensile strength and wear resistance, is not easy to tear, has good compression resistance, is suitable for bearing a certain preload, can maintain effective sealing under medium and high pressure, and is widely used in hydraulic systems, flange connections and other locations.

3. Stable sealing

NBR can achieve a variety of hardnesses (generally 60~80 Shore A) during processing, has good compression rebound performance, and can effectively fit the sealing surface under static sealing conditions to prevent leakage.

4. Moderate operating temperature range

Generally, NBR gaskets are suitable for temperatures ranging from -25°C to +100~120°C (special formulas can withstand low temperatures of -40°C or short-term high temperatures of 130°C), meeting the needs of most industrial oil systems.

5. Flexible processing and low cost

NBR gaskets are easy to mold, punch, and injection mold, and are relatively inexpensive. They are a very cost-effective sealing material suitable for mass use.

⚠️ Limitations of NBR:

Not resistant to strong acids, strong alkalis, chlorinated solvents, and ketones (such as acetone, benzene, esters, etc.). Chemical industry applications require confirmation of media compatibility;

Limited high temperature resistance, and it is easy to age and harden and lose elasticity when continuously above 120°C;

Not resistant to ozone and strong ultraviolet rays, and is prone to cracking and aging outdoors or in long-term sunlight exposure;

Softness is lower than silicone/EPDM, and is not suitable for sealing conditions requiring high compressibility.

? Typical applications:

Hydraulic system flange seals: such as hydraulic cylinders, pumps, valve sealing gaskets;

Automotive industry: engine, oil circuit, fuel system seals;

Mechanical equipment: gearbox, bearing seat, lubrication system gasket;

Petroleum and natural gas industry: oil seals, flange oil gaskets;

Compressed air and pneumatic equipment: used to resist oil and gas mixed environment;

Household appliances and industrial pump bodies: such as air compressors, oil cooling equipment connection parts seals;