Nitrile 4262-75

Automotive Fluid Resistant, Cost Effective, Enhanced Physical Properties, Excellent Seal Properties, Gasoline Resistant, Good Mechanical Properties, Heat Resistance, High Durability, Highly Versatile, Low Compression Set, Low Friction, Low Temperature Flexibility, Low Temperature Resistant, Oil Resistant, Wide Temperature Operating Range

Nitrile O-rings are used in a broad range of industrial, automotive, and aircraft fluids at temperatures between -65 and 250°F. More than 50 percent of sealing needs can be met using nitrile seals.

Parco's nitrile seals are an excellent choice for various applications. Key features include the following: • Excellent resistance to various chemicals: Parco nitrile seals resist a broad range of industrial, automotive, and aircraft fluids. • Wide range of service temperatures: Parco nitrile seals are suitable for applications from -65° to +285°F, depending on the compound. • UL-listed: Certain Parco nitrile seals are UL-listed for gasoline, kerosene, LP gas, diesel fuels, and fire extinguishers. • MIL SPEC conforming: Parco offers nitrile seals to meet demanding military and aerospace specifications. • Unsurpassed economy: Nitrile is the most economical high-performance seal material available.

Nitrile compounds are the most widely used industrial seal materials. Parco's nitrile seals offer excellent service in diverse fluids, including hydrocarbon fuels and fluids, solvents, water, and water-based solutions. Those seals have a long history of reliable service from -65 to 250°F at pressures up to 1,500 psi. Because of the excellent economy of nitrile seals, follow Parco's general rule: consider nitrile seals first. Nitrile compounds are copolymers of acrylonitrile and butadiene. Acrylonitrile provides resistance to petroleum-based fluids such as oils and fuels, while butadiene contributes to low-temperature flexibility. Different nitrile compounds are formulated by adjusting acrylonitrile levels to achieve the desired balance of petroleum-based fluid resistance and flexibility at the anticipated service temperature. Standard nitrile is also known as Buna N Rubber or by the ASTM D1418 designation NBR. Parco offers more than 100 nitrile compounds tailored to a broad range of operating conditions. Acrylonitrile content, curing system, and type and quantity of plasticizers are a few of the compounding factors that can be varied to match the seal material to the end-user's requirements. Parco also produces special types of nitriles for more demanding applications. Hydrogenated nitrile, designated HNBR, is used with automotive lubricants and sour crude oil containing aminebased corrosion inhibitors. HNBR is also used when a seal is exposed to ozone and higher temperatures. Carboxylated nitrile, designated XNBR, provides improved abrasion resistance and superior extrusion resistance at high pressures. If you are unfamiliar with the different types of elastomeric seal materials currently in use, consult Parco's Elastomer Selection Guide before reading this guide. There you will find guidelines to help you select the best elastomer for your application. When you have determined that a nitrile compound may be appropriate for your application, use this guide to narrow your choice. Contact a Parco customer service representative to to obtain additional product information about specific nitrile compounds.