*mydirectindustry

Catalogs
Backer Hotwatt Inc
Cartridge and immersion heaters

Cartridge and immersion heaters

Product catalog summary

Overview: Hotwatt manufactures a wide range of cartridge heaters, offering customization in size, sheath, leads, terminals, wattage, and voltage to meet specific heating needs. They maintain a stock of materials for quick fabrication and immediate delivery of standard sizes.

Applications: Cartridge heaters are used in various applications such as compressor crankcase heating, copiers, dies, food processing, glue pots, heat sealing, hot melt adhesive, labeling, medical equipment, packaging, photographic processing, plastic molding, platens, and wax pots.

Features:

Localized heat for restricted areas requiring close thermal control.
Efficient heating of dies, platens, and other processing equipment.
Work temperatures up to 1250ºF (677ºC) with proper heater location and wattage output.
Adaptable designs for special requirements, sizes, or ratings.
Maximum surface temperatures up to 1250ºF.
Etched designations on the sheath for accurate shape preservation.
Heating elements positioned for maximum heat transfer and minimum core temperature.
Made in the USA, with options for liquid-tight units.
Long, trouble-free service life.

Construction:

Heliarc welded end seal.
Mica insulation.
Series 300 stainless steel sheath for stable, non-oxidizing contact.
Element wire close to the surface for optimal heat transfer.
Magnesium oxide packing and ceramic element support.
Ceramic cap with Teflon or fiberglass insulated leads.

Specifications: Detailed specifications for various cartridge heater models include sheath length, wattage range, diameter, and voltage. Tables list minimum and maximum wattage for different diameters and lengths, along with approximate density and weight for each model.

Certifications: The heaters are U.L. Recognized (E56973) and C.S.A. Certified (016386-0-000).

Ordering Information: Customers should specify the catalog number, wattage, voltage, lead type, and any special features when ordering. Stock and manufactured items are available, with custom lengths and wattages upon request.

Tolerances: Wattage tolerances are +5%, -10% at rated voltage. Diameter and length tolerances are specified to ensure proper fit and performance.

Specifications and Installation: Cartridge heaters require precise fitting for optimal performance and longevity. Installation holes should not exceed 0.002 inches larger than the nominal size. Heaters are designed to be slightly smaller than the nominal diameter to ensure a slide fit, promoting efficient heat transfer and cooler operation.

Cycling and Temperature Control: Frequent cycling between extreme temperatures reduces heater lifespan. Optimal wattage should achieve a 50/50 off/on cycle. For operations above 750°F, consider voltage regulation to minimize temperature fluctuations. Thermostats should be placed within 1/2 inch of the heater to prevent overheating.

Wattage and Voltage: Minimum wattage is 60 watts per square inch, with lower densities available for specific conditions. Standard voltages are 120V or 240V, with other options available. Termination includes 6-inch leads, with longer lengths available.

Tables and Graphs: Tables provide maximum allowable ohms per inch by diameter and wattage ranges for different heater sizes. Graph A illustrates maximum watts per square inch at various temperatures and hole tolerances.

Special Features and Modifications: Various special features and modifications are available for Hotwatt electric heating elements, including different lead configurations, lead protection options, sealing and potting for adverse conditions, and attaching fittings. Special electrical features like three-phase heaters and multiple heat units are also available.

Available Bushings: Brass and stainless steel bushings are available, with specifications for NPT size, standard termination, and maximum amperage. The document lists catalog numbers and maximum wattage for different lengths of immersion heaters.

Special Features:

Miniature Circulation Heater: Designed for small volumes of liquids, constructed of 316 stainless steel, and capable of handling pressures up to 100 psig.
Pure Flow Air Heaters: Supplied with specific terminals and enclosures, available in various wattages and voltages.

Applications: Suitable for use in restaurant steam tables, humidifiers, food cookers, water tanks, and process water heaters. Features include stainless steel construction, automatic internal high limit, and easy mounting.

Catalog excerpts

Cartridge Heaters CARTRIDGE Hotwatt manufactures a wide range of cartridge heating units for a variety of applications. This size, sheath, leads, terminals, wattage and voltage can be adapted to your heating requirements. Hotwatt can provide you with heating units manufactured to your specifications to accommodate your application. Hotwatt stocks all material for the different diameter units listed in this catalog. Your order, specifying the wattage, voltage, diameter, length and lead type is readily and quickly fabricated from our inventory. In addition, many standard sizes are available from stock for immediate delivery. Email: [email protected]

Open the catalog to page 1

Cartridge Heaters U.L. Recognized – E56973 C.S.A. Certified 016386-0-000 Low to Medium Watt Density Applications: Compressor Crankcase Heating, Copiers, Dies, Food Processing, Glue Pots, Heat Sealing, Hot Melt Adhesive, Labeling, Medical Equipment, Packaging, Photographic Processing, Plastic Molding, Platens, Wax Pots. Construction: 1 Heliarc welded end seal. 2 Mica. 3 Series 300 stainless steel sheath of precision dimensions and tolerances for intimate, stable, non-oxidizing contact with cavities machined for them. • Hotwatt Precision Cartridge Heaters provided localized heat to restricted work...

Open the catalog to page 2

Cartridge HeatersLow to Medium Watt Density ▼ Manfactured Items ▼ Maximum Amperage: 2 Not UL/CSA Length Cat. No. Watts Watts 532" (.155/.152) 2 Not UL/CSA Min. Max. Cat. No. Watts Watts For longer lengths, compute wattage at: 10 watts per linear VS" • Lengths longer than those listed may be ordered. 10 watts per linear VS" 12 watts per linear VS" The following table should be used to determine the allowable voltage for low wattage miniature elemnets: NA-Not Available Diameter: 1811 Diameter: 3/6M Watt Approx. Density Wght. Length Cat.No. Watts Volts w/in.2 (lbs.) Length Cat.No. Watts Volts Wattage...

Open the catalog to page 3

Cartridge HeatersLow to Medium Watt Density CARTRIDGE Diameter: Maximum Amperage: For longer lengths, compute wattage at: 25 watts per linear 12" 35 watts per linear 12" 35 watts per linear 12" • Lengths longer than those listed may be ordered. Length Cat.No. Watts Volts Diameter: 14" (continued) Approx. Wght. (lbs.) Length Cat.No. Watts Watt Approx. Density Wght. w/in.2 (lbs.)

Open the catalog to page 4

Cartridge HeatersLow to Medium Watt Density ▼ IN STOCK ITEMS (Continued) ▼ Length Cat.No. Watt Density Watts Volts w/in.2 CARTRIDGE Web: www.hotwatt.com Email: [email protected]

Open the catalog to page 5

Cartridge HeatersLow to Medium Watt DensityLU o a ▼ Manfactured Items ▼ For longer lengths, compute wattage at: 45 watts per linear 12" 60 watts per linear 12" 70 watts per linear 12" • Lengths longer than those listed may be ordered. Diameter: 12" Watt Approx. Density Wght. Length Cat.No. Watts Volts w/in.2 (lbs.) Diameter: 12" (continued) Watt Approx. Density Wght. Length Cat.No. Watts Volts w/in.2 (lbs.)

Open the catalog to page 6

Cartridge HeatersLow to Medium Watt Density ▼ IN STOCK ITEMS (Continued) ▼ Diameter: V2" (continued) Watt Approx. Density Wght. Length Cat.No. Watts Volts w/in.2 (lbs.) Diameter: %" (continued) Diameter: %" Watt Approx. Density Wght. Length Cat.No. Watts Volts w/in.2 (lbs.) Length Cat.No. Watts Volts Watt Approx. CARTRIDGE Diameter: %" Length Cat.No. Watts Volts Watt Approx. Web: www.hotwatt.com Email: [email protected]

Open the catalog to page 7

Cartridge HeatersLow to Medium Watt DensityCARTRIDGE ▼ IN STOCK ITEMS (Continued) ▼ Diameter: %" (continued) Watt Approx. Density Wght. Length Cat.No. Watts Volts w/in.2 (lbs.) 95 watts per linear 12" 120 watts per linear 12"

Open the catalog to page 8

Cartridge HeatersLow to Medium Watt Density ▼ Manfactured Items ▼ Diameter: Maximum Amperage: Length Cat. No. Watts Watts CARTRIDGE For longer lengths, compute wattage at: • Lengths longer than those listed may be ordered. Wattage The maximum wattages listed are computed at 60 watts per square inch of heated surface. With proper fit in a heat sink, long life can be expected at this watt density. Consult factory for higher watt density applications. Lower watt density will result in longer life. Any wattage within standard limits may be ordered without affecting price. Voltage Standard voltages...

Open the catalog to page 9

Cartridge HeatersSuperwatt® High Watt DensityCARTRIDGE Applications: 1 2 3 4 5 6 Dies, Heat Sealing, Hot Melt Adhesive, Plastic Molding, Platens, Shoe Machinery. Features: • Elements are designed for maximum: Watt density, temperature, heat transfer and heater life. • The useful life of a Cartridge heating element is determined by how quickly the heat generated in the resistance wire can be disappated to the outside sheath. With low and moderate watt density elements, such as Hotwatt's standard line, the conventional method of inserting helical coils in formed ceramics is an entirely satisfactory...

Open the catalog to page 10

Cartridge HeatersSuperwatt® High Watt Density ▼ Manfactured Items ▼ Maximum Amperage: 3.5 Not UL/CSA Length Cat. No. Watts Volts Length Cat. No. Watts Volts CARTRIDGE ▼ Manfactured Items ▼ Diameter: V Watt Approx. Density Wght. Length Cat.No. Watts Volts w/in.2 (lbs.) Diameter: V (continued) Watt Approx. Density Wght. Length Cat.No. Watts Volts w/in.2 (lbs.) Web: www.hotwatt.com Email: [email protected]

Open the catalog to page 11

Cartridge HeatersSuperwatt® High Watt Density CARTRIDGE Diameter: V (continued) Length Cat.No. Watts Volts Length Cat.No. Watts Volts ▼ IN STOCK ITEMS (Continued) ▼ Diameter: 3/8" (continued) Approx. Wght. (lbs.) Length Cat.No. Watts Watt Approx. Density Wght. w/in.2 (lbs.) • Lengths longer than those listed may be ordered.

Open the catalog to page 12

Cartridge HeatersSuperwatt® High Watt Density ▼ IN STOCK ITEMS (Continued) ▼ Length Cat.No. Watts Volts Diameter: 12" (continued) Approx. Wght. (lbs.) Length Cat.No. Watts Watt Approx. Density Wght. Volts w/in.2 (lbs.) CARTRIDGE ▼ Manfactured Items ▼ Web: www.hotwatt.com Email: [email protected]

Open the catalog to page 13

Cartridge HeatersSuperwatt® High Watt Density CARTRIDGE ▼ IN STOCK ITEMS ▼ Diameter: %" Diameter: %" Watt Approx. Density Wght. Length Cat.No. Watts Volts w/in.2 (lbs.) Length Cat.No. Watt Approx. Density Wght.

Open the catalog to page 14

Cartridge and immersion heaters

Cartridge and immersion heaters

Catalog excerpts

All Backer Hotwatt Inc catalogs and technical brochures