Processing & Flow Control

Pipeline gasket reference guide

April 22, 2014

Nelson-Jameson Inc.

Dive into a world of versatility with our extensive gasket line tailored for the unique demands of the food and beverage industries. At your fingertips, you'll find a diverse array of sizes, colors, and materials, meticulously chosen to meet the stringent requirements of these industries. Our commitment to providing comprehensive information is reflected in the Pipeline Gasket Reference Guide, a valuable resource offering insights into material options, temperature ranges, chemical resistance, tear resistance, durometer, and more. Whether you seek gaskets for specific temperature-sensitive applications or those resilient to various chemicals, our reference guide equips you with the knowledge needed to make informed decisions. Explore the possibilities, and discover the perfect gasket solution that aligns with your industry's standards and requirements.

Item/Material	Temperature Range	Chemical Resistance					Tear Resistance	Durometer	General Information
Item/Material	Temperature Range	Nitric Acid	Phosphoric Acid	Sodium Hypochlorite	Chlorine	Fats/Oils	Tear Resistance	Durometer	General Information
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.
Information from Rubber Fav Chemical Resistance Chart. Phosphoric Acid—20%; Nitric Acid—Dilute; Chlorine—Wet. Typical—actual may vary depending on manufacturer.