For cold climates where electrical thawing of service connections is required, metal contact strips are molded into the Fastite gasket, providing a “built-in” contact that will carry the necessary current between the socket and the pipe end. Under compression, the rubber gasket forces the contact strips firmly against the metal surfaces. This design assures an enclosed and protected contact that remains effective against expansion, contraction or future movement of the joint. Special preparation of the pipe sockets and plain ends is required when using conductive gaskets. Instructions are outlined on each can of AMERICAN Fastite joint lubricant. The Fastite joint conductive gasket is satisfactory for transmission of electrical current up to 600 amps.
Other types of joint bonding are used to provide electrical conductivity across joints for low voltage/current requirements applications.
A protective coating is applied to the sockets and beveled ends of Fastite conductive joint pipe prior to shipment to protect the gasket seating surfaces during transportation and storage prior to assembly.
Note: Fastite conductive gaskets should not be used with Fastite restrained plugs. Some sizes of Fastite pipes may not be suitable for use with conductive gaskets – please consult AMERICAN.
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 | 150 |
Plain Rubber | Styrene Butadiene | Electrical continuity for thawing | 150 | 150 |
EPDM | Ethylene Propylene | Water, Sewage, Ketones, | 212 | 200 |
Neoprene | Polychloroprene(CR) | Fresh Water, Sewage | 200 | 180 |
Nitrile | Acrylonitrile | Non-Aromatic Hydrocarbons, | 150 | 150 |
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.
