Finned Tubular Heaters

Type W1 – Stainless Steel Wire Braid Provides good protection to lead wires where flexibility is needed. Standard 10″ (254 mm) braid over 12″ (305 mm) leads. Termination Options .90" – 1.0 < 1.10 1.0" – 1.10 Basic Applications Bracket Collar Electrical Terminations Fin Materials Finned Outside Diameter Fitting Incoloy® Lead Wire Lead Wire Protection Moisture Seals Mounting Options Other Sheath Materials Special Finish Stainless Steel Standard Steel Surface Treatments Washer Type TM – Stud with Mica Insulator Threaded stud terminal with mica insulator. Element Diameters .260" and .315" – not available for Finned Tubular Heaters Screw Terminals Type T – Stud Terminal Threaded stud terminal with ceramic insulator. Type SS – Silicone Resin Seal A brushed-on coating that penetrates the MgO, offering economical moisture protection under humid storage conditions./ Maximum Usable Termination Temperature: 390°F (200°C) UL Rated Maximum Termination Temperature: 221°F (105°C) Type V2A: conformal coating Type V2B: silicone oil Lugs Pins Type SHE – Epoxy Resin Seal Epoxy resin provides a moisture resisting barrier. UL Rated – Maximum Termination Temperature: Type V: 194°F (90°C) Type V1: 266°F (130°C) Type V4: 392°F (200°C) Type SF9 – Quick Connect 90° 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. Type SF – Quick Connect Straight 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. Type SER – RTV Seal RTV (room temperature vulcanizing) silicone rubber adhesive sealant provides a good moisture seal. UL Rated – Maximum Termination Temperature: Type R: 302°F (150°C) Type R1: 392°F (200°C) Type R1 – Flexible Armor Cable Type R1A Galvanized cable Type R1B Stainless steel cable Provides excellent protection to lead wires in abrasive environments. Standard 10″ (254 mm) armor cable over 12″ (305 mm) leads. Type P – Plain Pin Plain terminal pin. Specify Length “L.” Standard 1/2″ (12.7 mm) pin length. Type MF – Mounting Bracket An economical way to mount the heater in non-pressurizing, non-liquid applications. Type MC – Mounting Collar 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. Element Diameter .625" – not available Element Diameters .260" and .315" – not available for Finned Tubular Heaters Type LR – Locator Washer 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. Type L9 – Terminal Lug 90° 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 L – Terminal Lug A nickel-plated steel lug is projection welded to the terminal pin straight. Standard LA, 10-32 screw Optional LB, 8-32 screw Type F1 – Lead Wire 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 F1C F1D & F1E available with optional heat shrink sleeving. When selecting a lead wire type, consideration should be given to the maximum ambient temperature the lead wire is exposed to and the environment it is in. Standard 10″ (254 mm) leads with fiberglass sleeve. Specify if other lead length is required. Type E – Terminal Lug Right Angle 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 Type B – Bulkhead Fittings 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. Fittings for vacuum or high pressure gas and liquid use are silver brazed or TIG welded. Method will vary by material and application. Fittings in table are most commonly used. Special fittings can be made to meet your application requirements. Standard fitting location is with threads flush at the end of the element sheath as shown below. For other locations specify distance from end of sheath. Type A – Right Angle Terminal For use when space is tight. Steel Fins Steel wound with copper wire between fins for oven brazing to sheath. Fin Strip Width: 5/16” on .315, .375 and .430 diameters 3/8” on .315, .375 .430 and .475 diameters Fin Thickness: 26 Ga. (.018); Optional 24 Ga. (.024) Low Carbon Used for high to low viscosity oils, asphalt, tar, wax, molten salt, heat transfer liquid media and other compatible solutions. Stainless Steel Fins Stainless steel is mechanically wound but can be oven brazed as an option if a bright annealing atmosphere is used. Fin Strip Width: 5/16” on .315, .375 and .430 diameters 3/8” on .315, .375 .430 and .475 diameters Fin Thickness (304SS): 26 Ga. (.018) Oven Brazed & Annealed This process produces a thin oxide coating on the fins & sheath. The copper braze material provides a further benefit by coating portions of the sheath. Suitable for most clean air applications containing low to moderate amounts of organic VOC’s and moisture. Nickel plated steel finish Nickel plated finish is available to provide the highest possible corrosion protection on steel finned heaters. Usable up to 500⁰F for salt water marine applications, air containing high concentrations of organic VOC’s, flue gas residues, ammonia, and many other chemical vapors. Please contact Tempco with your specific application requirements. Incoloy 840 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. 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. High Heat Aluminum painted High heat Aluminum paint available for steel finned units is suitable for use up to 700⁰F. It has good moisture resistance and provides the heater with a rust protective coating for ambient air applications containing organic or non-corrosive VOC’s. Recommended for use in most air duct applications. High heat flat black painted surface This is a high temperature, high emissivity, flat black coating which protects steel finned heater surfaces from oxidation while acting as a blackbody emitter. Usable up to 1000⁰F, it provides a radiant surface for free convection & low velocity convective applications. Bright Annealing Bright annealed steel or stainless steel finned heaters produce a smooth bright finish. For applications requiring a clean un-oxidized surface with no rust or other contamination. Stainless finned heaters can be used in applications at higher temperatures and where moderate to high concentrations of organic or non-corrosive vapors are present. 316/316L Stainless Steel 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 316L (low carbon) is used for Finned Tubular Heaters. 304/304L Stainless Steel 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) 304L (low carbon) is used for Finned Tubular Heaters. .315" dia. With 3/8" fins Outside Diameter: 1.05” OD Fin Pitch Standards: 5±.5 for 5/16 material, 4.5-5 for 3/8 material (up to 6 per inch maximum .475" dia. With 3/8" fins Outside Diameter: 1.21” OD Fin Pitch Standards: 5±.5 for 5/16 material, 4.5-5 for 3/8 material (up to 6 per inch maximum .430" dia. With 5/16" fins Outside Diameter: 1.04” OD Fin Pitch Standards: 5±.5 for 5/16 material, 4.5-5 for 3/8 material (up to 6 per inch maximum .430" dia. With 3/8" fins Outside Diameter: steel fins—1.15”, SS fins 1.16” Fin Pitch Standards: 5±.5 for 5/16 material, 4.5-5 for 3/8 material (up to 6 per inch maximum .375" dia. With 5/16" fins Outside Diameter: 98” OD Fin Pitch Standards: 5±.5 for 5/16 material, 4.5-5 for 3/8 material (up to 6 per inch maximum .375" dia. With 3/8" fins Outside Diameter: 1.11” OD Fin Pitch Standards: 5±.5 for 5/16 material, 4.5-5 for 3/8 material (up to 6 per inch maximum .315" dia. With 5/16" fins Outside Diameter: 92” OD Fin Pitch Standards: 5±.5 for 5/16 material, 4.5-5 for 3/8 material (up to 6 per inch maximum