Pipeline Gasket Reference Guide
We offer a wide variety of sizes, colors, and materials in our gasket line, specifically selected for the food and beverage industries. For more specifics on your application please contact our product specialist at 1-800-826-8301.
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Item/Material | Temperature Range |
Chemical Resistance1 | Tear Resistance |
Durometer2 | General Information | ||||
Nitric Acid |
Phosphoric Acid |
Sodium Hypochlorite |
Chlorine | Fats/Oils | |||||
Standard | |||||||||
Buna-N | -40 to 225°F | Poor | Excellent | Poor | Poor | Excellent | Excellent | 72 | Standard Dairy & Food industry gasket. High volume equates to lowest cost. Does not hold up well to Nitric based CIP cleaners. Standard black, also white. |
EPDM | -60 to 300°F | Fair | Excellent | Excellent | Poor | Good | Fair | 70 | Good general Dairy and Food gasket. Better overall chemical resistance than Buna—not quite as good fat/oil. Standard black, also white. |
Viton | -20 to 400°F | Excellent | Excellent | Excellent | Fair | Excellent | Excellent | 80 | Best overall chemical resistance of common rubber gaskets. Highest price point. Standard black, also white. |
Silicone | -80 to 450°F | Poor | Poor | Good | Poor | Good | Fair | 70 | More common in pharmaceutical than dairy. Good overall chemical resistance. Excellent temp range. Softer durometer. Generally white or red color. |
Teflon | -100 to 500°F | Excellent | Excellent | Excellent | Excellent | Excellent | Excellent | 56 | Excellent chemical & temp resistance. Very hard durometer can make sealing difficult in pipeline gasket application. Standard white, also blue. |
Specialty | |||||||||
Poly-SS | -320 to 550°F | Excellent | Excellent | Excellent | Excellent | Excellent | Excellent | 68 | Passivated Stainless Steel & Teflon blended in molten state (prior to molding). Highest chemical & temp resistance. Hard durometer. Highest price point. |
Metal Detectable | See base rubber |
See base rubber |
See base rubber |
See base rubber |
See base rubber |
See base rubber |
See base rubber |
See base rubber |
Ferrous powder mixed with rubber in molten state (prior to molding). Has same general characteristics as base rubber. Standard in Silicone & Buna. Blue color. |
Color-Coded | See base rubber |
See base rubber |
See base rubber |
See base rubber |
See base rubber |
See base rubber |
See base rubber |
See base rubber |
Color code by area or date changed. Has same general characteristics as base rubber. Standard Buna. Others with minimum. |
Teflon Envelope | -20 to 400°F | Excellent | Excellent | Excellent | Excellent | Excellent | Excellent | 65-75 | A "sandwich" Teflon wrapped around Viton. Gives some better sealing than standard Teflon, but still not as good as rubber. |
1Information from Rubber Fav Chemical Resistance Chart. Phosphoric Acid—20%; Nitric Acid—Dilute; Chlorine—Wet. 2Typical—actual may vary depending on manufacturer. |