Product Description: The longevity and trouble-free service of a Circulation Heater depend on selecting proper sheath materials, watt densities, and operation temperatures.
Standard Element Sheath Materials
Incoloy ® 800 - A Nickel (30-35 %), Chromium (19-23 %), Iron alloy. The high nickel content of this allow contributes to its resistance to scaling and corrosion. Used in air heating and immersion heating of potable water and other liquids that are not corrosive to an Incoloy 800 sheath. Sheath temperatures to 1600°F (871°C).
Low Carbon Steel - Applications include fluid heat transfer media, tar, high to low viscosity petroleum oils, asphalt, wax, molten salt, and other solutions not corrosive to steel sheath. Sheath temperatures to 750°F (399°C).
316 Stainless Steel - A Chromium (16-18 %), Nickel (11-14 %), Iron Alloy with Molybdenum (2-3 %) added to improve corrosion resistance in certain environments, especially those which would tend to cause pitting due to the presence of chlorides. Applications include deionized water. Sheath temperatures to 1200°F (649°C).
Copper - Mainly used in clean water heating for washrooms, showers, rinse tanks and freeze protection of storage tanks. Sheath temperatures to 350°F (177°C).
Optional Element Sheath Materials
304 Stainless Steel - A Chromium (18-20 %), Nickel (8-11 %), Iron Alloy used in the food industry, sterilizing solutions, air heating, and many organic and inorganic chemicals. Sheath temperatures to 1200°F (649°C).
321 Stainless Steel - A Chromium (17-20 %), Nickel (9-13 %), Iron Alloy modified with the addition of titanium to prevent carbide precipitation and resulting intergranular corrosion that can take place in certain mediums when operating in the 800-1200°F (427-649°C) temperature range. Sheath temperatures to 1200°F (649°C).
