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From the Learning Center: All About Sanitary Gaskets

26494Our flexible, non-toxic gasket compounds meet FDA specifications for direct contact with dairy products and edible oils, as well as 3-A, USDA and NSF criteria. They will not absorb taste or odors. Low-swell characteristics make them ideal for exposure to oils, steam and water.

Buna-N: Our most popular gasket material. Also called nitrile or NBR, this oil-resistant rubber compound has excellent compression set, tear and abrasion resistance. Ozone degrades Buna-N, so don’t store gaskets near electric motors and other ozone sources.

EPDM: Good for steam/hot water service. This rubber compound has good resistance to animal and vegetable oils,mild acids, dilute alkalies, silicone oils and greases, phosphates, esters, ketones and alcohols. Not recommended for petroleum oils or diester-based lubricants. Resists water absorption.

Viton: With one of the best fluid resistance characteristics of any commercial elastomer, Viton is particularly resistant to oils, fuels, lubricants and most mineral acids. Viton withstands high temperatures and retains good mechanical properties, oil and chemical resistance. Remains usefully elastic indefinately in air oven testing up to 400°F or, intermittently to 500°F. Excellent for steam service.

Silicone: Outstanding low-temperature flexibility. This rubber compound resists lubrication, animal and vegetable oils, most dilute acids and alkalies. Excellent ozone and weathering resistance. Also resists many solvents that can cause excess swelling.

Teflon: A plastic with an outstanding temperature range. Resists all chemicals except alakali metals, fluorine and some fluorinated chemicals. Because it is not a rubber compound, it will not return to its original shape when compressed. Envelope gaskets of Teflon with a rubber core are available to solve this problem.
Note: Listed by size of tube OD, not by ID/OD of gasket. Call our gasket and O-ring product specialists with questions. Gaskets sold individually, but order in package quantities for more economical pricing.

For more information on gaskets, click here.

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