This is an elastomer Buna-N Nitrile O-Ring for a grooved ASA 5.0 / ANSI 1.5 flange. The O-ring's width is 0.120 in. and its I.D. is 2.500 in. Used to mate an ASA 5.0 / ANSI 1.5 grooved flange with an ASA 5.0 / ANSI 1.5 smooth (non-grooved) flange. Buna-N, also known as nitrile, is less expensive than either Viton or silicone O-ring material. Buna O-rings exhibit excellent resistance to all petroleum-based oils and fuels, as well as water, various alcohols, silicone greases, and hydraulic fluids. Buna also displays good tear resistance and non-polar solvent resistance. Buna O-rings can be used in rough vacuum systems and are rated for high vacuum to 1 x 10-8 Torr. Buna has a lower high temperature limit of about 120°C, but can effectively seal down to -30°C. Buna can be a cost effective seal solution when higher temperature bakeout is not required. The permeability of Viton does not allow it to be used for ultra-high vacuum applications.

This is an elastomer Buna-N Nitrile O-Ring for a grooved ASA 6.0 / ANSI 2 flange. The O-ring's width is 0.120 in. and its I.D. is 3.500 in. Used to mate an ASA 6.0 / ANSI 2 grooved flange with an ASA 6.0 / ANSI 2 smooth (non-grooved) flange. Buna-N, also known as nitrile, is less expensive than either Viton or silicone O-ring material. Buna O-rings exhibit excellent resistance to all petroleum-based oils and fuels, as well as water, various alcohols, silicone greases, and hydraulic fluids. Buna also displays good tear resistance and non-polar solvent resistance. Buna O-rings can be used in rough vacuum systems and are rated for high vacuum to 1 x 10-8 Torr. Buna has a lower high temperature limit of about 120°C, but can effectively seal down to -30°C. Buna can be a cost effective seal solution when higher temperature bakeout is not required. The permeability of Viton does not allow it to be used for ultra-high vacuum applications.

This is an elastomer Buna-N Nitrile O-Ring for a grooved ASA 7.5 / ANSI 3 flange. The O-ring's width is 0.120 in. and its I.D. is 4.625 in. Used to mate an ASA 7.5 / ANSI 3 grooved flange with an ASA 7.5 / ANSI 3 smooth (non-grooved) flange. Buna-N, also known as nitrile, is less expensive than either Viton or silicone O-ring material. Buna O-rings exhibit excellent resistance to all petroleum-based oils and fuels, as well as water, various alcohols, silicone greases, and hydraulic fluids. Buna also displays good tear resistance and non-polar solvent resistance. Buna O-rings can be used in rough vacuum systems and are rated for high vacuum to 1 x 10-8 Torr. Buna has a lower high temperature limit of about 120°C, but can effectively seal down to -30°C. Buna can be a cost effective seal solution when higher temperature bakeout is not required. The permeability of Viton does not allow it to be used for ultra-high vacuum applications.