Tubular Heaters Tubular Heaters are highly adaptable to most applications where electrical heating is required. They can be used in their straight form or bent into various shapes. Tubular heaters can be used in free air, clamped to a surface, placed inside a groove or cast into metal. These versatile heating elements are available in steel, copper, stainless steel or Incoloy outside sheath and can be utilized in application temperatures of up to 1400°F.   Screw Plug Immersion Heaters Screw Plug Immersion Heaters are medium capacity heating units designed to provide heat inside tanks and pipes. They consist of a single or a set of tubular elements that are formed into hairpins and welded or braized to a screw plug. The sheath material of the heating elements could be steel, copper, stainless steel or Incoloy. The standard screw plug sizes utilized are 1”, 1 1/4”, 2” and 2 1/2” and are either made of steel, brass or stainless steel. Other sizes are available upon request. Various types of electrical protective enclosures, built in thermostats, thermocouples and high limit switches can also be incorporated.   Flanged Immersion Heaters Flanged Immersion Heaters are high capacity electrical heating units made for tanks or pressurized vessels. They consist of multiple tubular heaters formed into hairpin and welded or brazed to flanges. The heating elements could be made of copper, steel, stainless steel or Incoloy sheath. Standard flanges are carbon steel rated for 150 or 300 Lbs. Other flange materials and shapes are available. Various types of electrical protection housing, built in thermostats, thermocouples and high limit switches can be incorporated.   Duct Heaters Duct Heaters are heavy duty, dependable and safe heating units designed for low pressure air flow applications. They utilize Incoloy sheathed tubular elements that are formed into hairpins, properly supported and attached to a rectangular flange. A NEMA 1 enclosure with rust proof paint protects the electrical terminals and wiring. NEMA 4 enclosures are also available. A thick insulating wall protects the electrical wiring from possible overheating. Thermostats, thermocouples and high limit switches can be incorporated.   Circulation Heaters Circulation Heaters are highly efficient heating cells made for high and low pressure gases and liquids. They can be incorporated into systems as main heating units or as supporting booster units. Their heating core is a screw plug or a flanged immersion heater installed inside a pressure vessel that is thermally insulated. A stainless steel or rust proof painted outside metallic jacket protects the insulating material. Circulation heaters can have various mechanical features. Their inlet and outlet connections could be flanges or NPT threaded pipe extensions. Various electrical termination boxes with different protection characteristics, thermostats, thermocouples and high limit switches are available.   Over-the-Side Immersion Heaters Over-the-Side Immersion Heaters are for applications where installing a heater through the side wall of a vessel is not convenient. For these applications, units that hang from the side wall of a tank, or self supporting units that sit on the bottom of a tank with round or straight formed heating elements are available. The heater sheath could be made of copper, steel, stainless steel or Incoloy. The riser is made of steel or stainless steel. Various electrical protection boxes as well as control thermostats, thermocouples and high limit switches can also be incorporated.   Thermalators Thermalators are special heaters that maintain precise temperatures inside plastic moulds by controlling the temperature and flow of circulating water systems. With a solid construction, state of the art electronic controls and safety features, seven different models of Bucan thermalators cover a range of 9-18 KW heating capacity, 30-70 PSI water pressure and 21-40 GPM flow capacity.