CIRCULATION HEATERS

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Circulation heaters are used primarily to heat moving, flowing, or circulating fluid streams. Fluid flows through the heater, which transfers heat to the fluid stream. Any liquid or gas is generally acceptable for use with a circulation heater. Often, circulation heaters are used as stock tank heaters, asphalt heaters, livestock tank heaters, circulation tank heaters, dry well heaters, and septic tank heaters.

Applications

It is important to select a heater that is designed for its intended application. The viscosity, specific heat, flash temperature and corrosive properties of the fluid to be circulated through the heater may limit the watt density, recommended maximum temperature or require specific materials of construction. Common applications for circulation heaters include the heating of gases or vapors, clean water, process waters, high-purity waters, lightweight oils and degreasing solutions, heavy weight oils, medium weight oils, mild corrosive solutions, severe corrosive solutions, caustic solutions, and liquid paraffin.

APPLICATION12345
SOLUTION OR HEATER TYPEALKALINE OR ACID CONTENT (EST. % BY VOLUME)SHEATH MATERIALWATT DENSITY (W/IN2)VESSEL MATERIAL

Water

Clean Water

pH6 to pH8 (Neutral)

Copper

45 - 100

Galvanized Steel

Mild SolutionsProcess Water and Very Weak Solutions Weak Solutions Demineralized, De-ionized or Pure Waterph5 to pH9 (2 - 3%) 5 - 6%—INCOLOY®45 - 86 45 - 7545 - 75Stainless Steel
Corrosive & High Viscous SolutionsMildly Corrosive Solutions More Severe Corrosive Solutions Severely Corrosive Solutions5 -15% 10 - 25% 30 - 60%INCOLOY®20 - 2520 - 2510 - 20Stainless Steel
OilLow Viscosity Oils Medium Viscosity Oils High Viscosity Oils (Fuel Oil)——Steel20 - 25 10 - 205 - 15Steel
Air, Gases & SteamMedium Temperatures to 750°F High Temperatures to 1400°F

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INCOLOY®20 - 25 10 - 20Steel; Stainless Steel