NBR (nitrile rubber, or Buna-N) is a synthetic elastomer engineered for flat gaskets, washers, and seals in contact with mineral oils and compatible petroleum-based fluids. Operational performance depends on the specific grade selected.

NBR is generally well-suited for a wide range of petroleum-based lubricants and hydraulic fluids. American Biltrite offers AB-365 for these applications, as well as for diesel and biodiesel services. The specific fluid must be confirmed.

American Biltrite specifies an indicative operating temperature range of −40 to +93 °C for AB-365 and AB-366. However, these limits do not guarantee flange sealing integrity across all pressures throughout this entire range.

NBR is typically the preferred choice for a wide range of mineral oils and petroleum-based fluids, whereas EPDM is often better suited for hot water, ozone, and outdoor weathering. Optimal selection depends on your specific media and compound formulation.

SBR is suitable for specific mechanical and protective applications, but generally offers lower resistance to mineral oils and fuels. For effective oil sealing, an appropriately specified NBR is typically the preferred solution.

Standard NBR sheet materials such as AB-365 and AB-366 should not be assumed suitable for demanding steam service. Depending on your process conditions, EPDM, PTFE, or graphite may be recommended subject to engineering review.

The manufacturer indicates that the white AB-366, formulated in NBR/SBR, complies with FDA 21 CFR 177.2600 and 3-A Sanitary Standards for the intended operating conditions. Specific application requirements, supporting documentation, and overall equipment compliance must be verified.

Catalogue specifications indicate thicknesses ranging from 0.8 to 15.9 mm for the AB-365 and from 1.6 to 12.7 mm for the AB-366, depending on the format. These represent manufacturer standard thicknesses and do not guarantee immediate stock availability at VAMECA.

There is no universal maximum pressure rating for nitrile sheet material. Actual limits depend on flange design, dimensions, thickness, bolt load, and media compatibility. Published tensile strength values in psi do not represent working pressure ratings.

Yes, VAMECA can engineer custom nitrile gasket cutting based on your drawing, CAD file, or physical sample. To help us determine the optimal material selection and prepare a competitive quote, please provide the media, operating pressure, temperature, dimensions, thickness, and required quantity.