Electric Immersion Heaters

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Electric Immersion Heaters are used to heat liquid and gases. The heating elements are directly immersed into the fluid or gas and direct contact is made between the element and the media. Careful consideration has to be made for the compatibility of media and the element construction. There are different styles of immersion heaters, some of them are screw plug, flanged, over-the-side, circulation and in-pipe heaters. Anderson-Bolds can supply all of these types of electric immersion heaters.

Screw Plug Immersion Heaters	Screw plug immersion heaters consist of tubular elements in a threaded hex plug. Some models are provided with a thermowell for the temperature control sensor and a variety of electrical enclosures for electrical connections. They screw directly through threaded openings in tank walls to heat liquids, viscous fluids, forced air, and gases by direct contact. The screw plugs are in sizes 3/4, 1", 1.25", 2", and 2.5". Wattages range from 100 to 18000.
Flanged Immersion Heaters	Ideal for generating steam and heating gases and liquids in pressure vessels and tanks, flanged immersion heaters are hairpin-bent tubular elements welded or brazed into a flange and provided with electrical enclosures. Flanged immersion heaters are available in a wide selection of flange sizes and with a variety of electrical enclosures. Most units are UL-listed and CSA-certified or can have ATEX certification. ASME or PED code construction is also available for high-pressure applications. Flanged Immersion heaters can be made up to mega watt sizes. SCRs are best used to control these large loads.
Over The Side Immersion Heaters	Over-the-Side immersion heaters are designed for installation in the top of the tank with the heated portion directly immersed along the side or at the bottom ("L" shaped). Over the Side immersion heaters take up little space, eliminate the need for tank penetrations, are easily removed for service, and provide ample working space inside the tank. Custom configured elements evenly distribute heat by direct contact in numerous applications, including acid and alkali solutions. Many units are Teflon coated and low watt density for protection against aggressive liquids.
Circulation Heaters	Circulation heaters are packaged units consisting of a screwplug or flanged immersion heater mounted in a thermally insulated heating chamber for efficient heating of a flowing medium by in-line or side-arm operation. Thermocouple sensors can be provided to connect to most any controller. Select from many terminal enclosures, sheath and vessel materials, flanged connections, and controls. Applications include: Water Heating, Freeze Protection, Heat Transfer Oil Heating, Fuel Oil Heating, Steam, Air, and Gas Heating and others.
In Pipe Immersion Heaters	In-pipe immersion heaters utilize drywell type heaters with open coil element assemblies that can be removed and serviced without draining tanks or systems, eliminating down time. Easily installed the heavy-duty assemblies weld directly into storage tanks to deliver long term and economical performance. Once installed, the flexible heater elements are removable from heater tubes without the need to drain the tank or disconnect fluid lines. LO-DENSITY® IS A BIG PLUS. The large heater surface area is designed with a pre-determined low watt density (watts/sq. in.) giving low sheath temperatures to avoid coking or damage to the material being heated.

Please use our immersion heater application form for help in sizing and picking out the correct heater for your application.