AMERICAN innovation led to the development of the mechanical joint in 1921.
Plain rubber gaskets of SBR are normally used for water and domestic sewage service. Fabric-tipped plain rubber gaskets are available, as well as other special gaskets such as oil-resistant rubber.
Plain rubber gaskets or tipped gaskets are used for air or liquid temperatures up to 150° F. For applications involving temperatures in excess of 150° F, or for other special service applications, and for installations in contaminated soils where permeation through gaskets might be a concern, consult AMERICAN for recommendations.
Standard joint accessories furnished with mechanical joint pipe and fittings include ductile iron glands, low-alloy steel tee head bolts with hex nuts, and plain rubber gaskets. The cost of these accessories may or may not be included in the price of the pipe or fittings, so confirm with your AMERICAN representative.
1.) When installing joints manufactured by AMERICAN Cast Iron Pipe Company, the use of gaskets not manufactured by AMERICAN or an authorized manufacturer of AMERICAN gaskets will invalidate joint warranties.
Gaskets made of SBR (Styrene Butadiene Rubber) are standard with all joint types. Consult AMERICAN for information or recommendations on gaskets made of special types of rubber, for applications involving air or liquid temperatures in excess of 150° F, or for chemical, hydrocarbon or other special service applications, and for installations in contaminated soils where permeation through gaskets might be a concern.
In the table below, temperature capability refers to conveyed fluid. Lubricating oil in air can adversely affect SBR and EPDM performance. SBR, Nitrile and Neoprene are not recommended for hot air exposure in wastewater treatment systems.
SBR rubber gaskets are ANSI/NSF Standard 61 certified for contact with potable water. All gaskets made from the materials as shown are suitable for use with water containing normal concentrations of chloramine. Where increased resistance to chloramine is desired, neoprene or fluoroelastomer materials should be considered. Consult AMERICAN.
Common Name | Chemical Name | Common Uses | Maximum Service Temperature 2 (°F) | |
|---|---|---|---|---|
Water & Sewer | Air | |||
Plain Rubber | Styrene Butadiene | Fresh Water, Salt Water | 150 | 125 |
EPDM | Ethylene Propylene | Water, Sewage, Ketones, | 212 | 150 |
Neoprene | Polychloroprene(CR) | Fresh Water, Sewage | 200 | 150 |
Nitrile | Acrylonitrile | Non-Aromatic Hydrocarbons, | 150 | 125 |
Fluoroelastomer | FKM | Aromatic Hydrocarbons, Gasoline, | 212 | 300 |
1.) AMERICAN reserves the right to furnish any trade or brand rubber for the chemical formulation specified.
2.) Temperature is in reference to conveyed fluid. Lubricating oil in air can adversely affect SBR and EPDM performance. SBR, Nitrile and Neoprene are not recommended for hot air exposure in wastewater treatment systems.
3.) Viton® is a registered trademark of DuPont Dow Elastomers.
4.) This gasket rubber is chemically resistant in the non-potable water uses shown but is not as resistant to permeation in potable water applications as FKM.
