Available in several diameters, lengths and sheath materials, these heaters can be formed into virtually any shape and can be brazed or welded to any metal surface. Choose specific application finned heaters or heaters for runnerless molds.
Carefully researched manufacturing methods and quality materials have made Tempco tubular heaters stand apart from other heating elements claiming similar performance.
A computer-designed helical coil of 80% Nickel 20% Chromium alloy resistance wire is fusion welded to the nickel-coated steel terminal cold pin. This coil assembly is precisely stretched and centered in the element metal sheath, which is then filled with Grade “A” Magnesium Oxide powder (MgO). The filled tube is then compacted by a roll reduction mill into a solid mass, permanently stabilizing the coil in the center of the tube while providing excellent heat transfer and dielectric strength between the coil and the sheath.
Nickel 18-20%, Chromium 18-22%, Iron balance.
Has about 10% less nickel than Incoloy 800. Used in many air heating applications, where it has exhibited superior oxidation resistance at less cost than Incoloy 800.
Nickel 30-35%, Chromium 19-23%, Iron balance.
The high nickel content of this alloy contributes to its resistance to scaling and corrosion. Used in air heating and immersion
heating of potable water and other liquids.
Chromium 16-18%, Nickel 11-14%, Iron balance.
(316L - Low Carbon)
Modified with the addition of Molybdenum (2-3%) 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.
Maximum Sheath Temperature: 1200°F / 649°C
Chromium 18-20%, Nickel 8-11%, Iron balance.
(304L - Low Carbon)
Used in the food industry, medical, and chemical heating.
Maximum Sheath Temperature: 1200°F (649°C)
Chromium 17-20%, Nickel 9-13%, Iron balance.
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.
Standard Copper Alloy
A low temperature, inexpensive material used mainly for clean water heating.
Maximum Sheath Temperature: 350°F / 177°C
Low Carbon
Used for high to low viscosity oils, asphalt, tar, wax, molten salt, heat transfer liquid media and other compatible solutions.
Iron 6-10%, Chromium 14-17%, Nickel balance
Maximum Sheath Temperature: 1800°F / 982°C
Available for a limited number of diameters. Consult matrusree for more information.
Nickel 38-46%, Chromium 19.5-23.5%, Molybdenum 2.5-3.5%, Iron balance
Available for a limited number of diameters. Consult matrusree for more information.
Bulkhead fittings provide a leakproof method for mounting tubular heating elements through tank walls. Standard are round brass fittings crimped onto the element that are suitable for low pressure water (up to 80 psig) and non-pressure air. A brass hex nut, plated steel washer and gasket are supplied as standard.
Plated steel mounting collars are locked in place with a set-screw and serve as an adjustable stop for through-the-wall mounting. Collars are shipped in bulk unless otherwise specified. Mounting collars can be ordered with the heater or purchased separately.ting collars are locked in place with a set-screw and serve as an adjustable stop for through-the-wall mounting.
Locator washers are permanently attached to the heater sheath by staking/crimping and are used to limit the movement of the heater while allowing for expansion and contraction of the heater sheath.
An economical way to mount the heater in non-pressurizing, non-liquid applications.
The standard tubular heater element surface finish is a black chrome oxide, produced when the element is annealed prior to forming in an exothermic atmosphere furnace.
An option where the tubular heater is annealed in a dissociated ammonia atmosphere furnace. This produces a clean metallic appearance without surface-etching the sheath.
An electrochemical process that removes surface imperfections and contaminants, enhancing the corrosion resisting ability of the sheath. The resulting surface is clean, smooth and has a bright finish; it is highly recommended for medical, food and other harsh applications.
Removes surface contamination, usually iron, so that the optimum corrosion resistance of the stainless steel is maintained. Surface contamination could come from the small amount of steel that may be worn off a tool during the manufacturing process.
Threaded stud terminal with ceramic insulator.
Threaded stud terminal with mica insulator.
Plain terminal pin. Specify Length “L.”
Standard 1/2" (12.7 mm) pin length.
1/4" male (3/16" optional) quick connect (slip-on) terminals are welded to the element terminal pin straight.
They provide quick and easy installation of lead wire with excellent holding force. Specify if an optional mica or ceramic insulator is required. Material: Nickel-Plated Steel.
1/4" male (3/16" optional) quick connect (slip-on) terminals are welded to the element terminal pin at 90° to the sheath.
They provide quick and easy installation of lead wire with excellent holding force. Specify if an optional mica or ceramic insulator is required. Material: Nickel-Plated Steel.
A nickel-plated steel lug is projection welded to the terminal pin straight.
Standard LA, 10-32 screw
Optional LB, 8-32 screw
A nickel-plated steel lug is projection welded to the terminal pin at 90° to the sheath).
Standard L9A, 10-32 screw
Optional L9B, 8-32 screw
Type E1A 8-32 screw with mica insulator (Standard)
Type E1B 8-32 screw with ceramic insulator
Type E2A 10-32 screw with mica insulator
Type E2B 10-32 screw with ceramic insulator
For use when space is tight.
Type F1A 250°C (482°F) TGGT insulation
Type F1B 450°C (842°F) MGT insulation
Type F1C 200°C (392°F) Teflon® insulation
Type F1D 150°C (302°F) Silicone Rubber insulation
Type F1E 105°C (221°F) Thermoplastic (PVC) insulation
A brushed-on coating that penetrates the MgO, offering economical moisture protection under humid storage conditions.
RTV (room temperature vulcanizing) silicone rubber adhesive sealant provides a good moisture seal.
Epoxy resin provides a moisture resisting barrier.
This type seal is used primarily for defrost heaters.
Ceramic to metal seals provide an airtight seal for temperatures to 500°F (260°C) in the seal area.
Single ended tubular heaters are made strictly per customer request, providing an economical alternative to cartridge heater applications, simplifying wiring and installation for applications requiring localized heat. Flanges, bulkhead and NPT fittings can be attached to the sheath for mounting or immersion heating applications. Contact Tempco for complete details.
