Immersion heaters are used in applications that require the heater to be immersed in the substance to be heated. They are equipped with pipe threads, flanges or other mounting hardware. Flange immersion heaters are equipped with a flange that is installed by bolting the heater to a matching flange that is welded to the vessel wall. Screw plug immersion heaters are equipped with a pipe fitting which screws into a threaded well. With both types of heaters, caution must be taken in evaluating the desired heat transfer rate to the heated substance. High-watt density immersion heaters should not be used with extremely viscous materials, explosives, or substances that are not well circulated because the risk of fire or scorching increases as fluid viscosity and heater-watt density increase. Common applications for flange and screw plug immersion 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.
Flange and screw plug immersion heaters can use AC or DC voltage and single-phase or three-phase power. Most heaters used alternating current (AC) instead of direct current (DC). Power requirements to consider include maximum operating (sheath) temperature, required voltage, heating capacity, and watt density. Maximum operating (sheath) temperature is the highest temperature that the heater's sheath (or protective cover) may reach. This is not the maximum temperature a heated substance may reach. Measured in kilowatts (kW), heating capacity is the wattage that a flange immersion heater or screw plug immersion heater can deliver. Watt density is a good measure of how quickly flange and screw plug immersion heaters can transfer heat to a heated surface. To calculate watt density, suppliers divide the available wattage by the heated surface area.
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Immersion Heaters: Screw Plug Immersion Heaters All Products >> Electric Heaters >> Immersion Heaters >> All Immersion Heaters See OMEGA Engineering, Inc. Information |
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Immersion Heaters See all Immersion Heaters... ? Introduction To Flanged Immersion Heaters ? Selection of Flanged Immersion Heaters ? Over-the-Side Immersion Heaters See OMEGA Engineering, Inc. Information |
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