Type NB: Standard Built-In Strap Clamping (Low Thermal Expansion), One-Piece Band
The Built-In Strap eliminates the use of awkward-to-handle separate straps, providing more drawing power than any other type of clamping system. The Duraband with Built-In Strap is standard on many designs.
Type NS: Standard Built-In Strap Clamping (Low Thermal Expansion), Two-Piece Band
The Built-In Strap eliminates the use of awkward-to-handle separate straps, providing more drawing power than any other type of clamping system. The Duraband with Built-In Strap is standard on many designs.
Type NE: Standard Built-In Strap Clamping (Low Thermal Expansion), One-Piece Expandable Band
The Built-In Strap eliminates the use of awkward-to-handle separate straps, providing more drawing power than any other type of clamping system. The Duraband with Built-In Strap is standard on many designs.
Type TWL: Wedge Lock, One-Piece Band
Wedge Lock clamping is designed for applications where mounting space is severely limited. It lends itself mainly to small diameter nozzle heaters.
Type SB: Separate Straps, One-Piece Band
The Separate Strap clamping is available with any screw or lead termination and construction variation. It is strongly recommended that the Duraband with Built-In Strap design be used whenever possible because it provides more drawing power than any other type of clamping system.
Type SS: Separate Straps, Two-Piece Band
The Separate Strap clamping is available with any screw or lead termination and construction variation. It is strongly recommended that the Duraband with Built-In Strap design be used whenever possible because it provides more drawing power than any other type of clamping system.
Type SE: Separate Straps, One-Piece Expandable Band
The Separate Strap clamping is available with any screw or lead termination and construction variation. It is strongly recommended that the Duraband with Built-In Strap design be used whenever possible because it provides more drawing power than any other type of clamping system.
Type SL: Spring Loaded with Built-In Bracket, One-Piece Band
The Heavy Duty Stainless Steel Spring with Built-In Bracket is a variation on the basic Duraband design. It is available with any screw or lead termination and construction variation. It is recommended for heaters over 12″ in diameter, and for any diameter heater used in the vertical position, to prevent the heater from slipping off the machine. The springs provide constant tension, therefore maintaining optimum surface contact against the cylinder being heated.
Type NSL: Spring Loaded with Built-In Bracket, Two-Piece Band
The Heavy Duty Stainless Steel Spring with Built-In Bracket is a variation on the basic Duraband design. It is available with any screw or lead termination and construction variation. It is recommended for heaters over 12″ in diameter, and for any diameter heater used in the vertical position, to prevent the heater from slipping off the machine. The springs provide constant tension, therefore maintaining optimum surface contact against the cylinder being heated.
Type NEL: Spring Loaded with Built-In Bracket, One-Piece Expandable Band
The Heavy Duty Stainless Steel Spring with Built-In Bracket is a variation on the basic Duraband design. It is available with any screw or lead termination and construction variation. It is recommended for heaters over 12″ in diameter, and for any diameter heater used in the vertical position, to prevent the heater from slipping off the machine. The springs provide constant tension, therefore maintaining optimum surface contact against the cylinder being heated.
Type LT: Latch and Trunnion, One-Piece Band
The Latch and Trunnion Clamping System is available with any screw or lead termination and construction variation. It is ideal for absorbing thermal expansion due to the spring loading on the screws. The latch fully opens, facilitating installation on large-diameter cylinders. The outer sheath is made from a Low Thermal Expansion alloy.
Type LS: Latch and Trunnion, Two-Piece Band
The Latch and Trunnion Clamping System is available with any screw or lead termination and construction variation. It is ideal for absorbing thermal expansion due to the spring loading on the screws. The latch fully opens, facilitating installation on large-diameter cylinders. The outer sheath is made from a Low Thermal Expansion alloy.
Type LE: Latch and Trunnion, One-Piece Expandable Band
The Latch and Trunnion Clamping System is available with any screw or lead termination and construction variation. It is ideal for absorbing thermal expansion due to the spring loading on the screws. The latch fully opens, facilitating installation on large-diameter cylinders. The outer sheath is made from a Low Thermal Expansion alloy.
Type FB: Bent-Up Flange (Ears), One-Piece Band
The Bent-Up Flange clamping is available with any screw or lead termination and construction variation. The outer sheath is made from a Low Thermal Expansion alloy. The Bent-Up Flange design is best suited for narrowband heaters with small diameters.
Type FS: Bent-Up Flange (Ears), Two-Piece Band
The Bent-Up Flange clamping is available with any screw or lead termination and construction variation. The outer sheath is made from a Low Thermal Expansion alloy. The Bent-Up Flange design is best suited for narrowband heaters with small diameters.
Type FE: Bent-Up Flange (Ears), One-Piece Expandable Band
The Bent-Up Flange clamping is available with any screw or lead termination and construction variation. The outer sheath is made from a Low Thermal Expansion alloy. The Bent-Up Flange design is best suited for narrowband heaters with small diameters.
Additional Options
Igloo® Ceramic Terminal Covers
Igloo® Ceramic Terminal Covers consist of two individual ceramic parts. Unlike conventional ceramic caps, Igloo fully insulates any standard #8 or #10 terminal lugs used for electrical hook-ups.
Limitations
Minimum Inside Diamter: 2″ (50.8 mm)
Minimum Width: 1-1/4″ (31.7 mm)
To assemble Igloo covers, the terminal should be at least 7/8″ apart.
Thermocouple Bayonet Adapter
A standard Bayonet Adapter facilitates the installation of an external thermocouple with a standard bayonet cap. The standard location for the adapter is 90° from the gap. Specify without through-hole for heater sensing or with through-hole for load sensing. For heaters, less than 1″ wide order separate strap clamping and utilize the gap for the thermocouple.
Refer to Temperature Sensors for a complete selection of thermocouples available from stock.
Thermocouple Coupling
The Thermocouple Coupling facilitates the installation of an external thermocouple with a threaded fitting to sense the temperature of the band. The standard location for the coupling is 90° from the gap. Specify without through-hole for heater sensing or with through-hole for load sensing.
Holes and Cutouts
Holes and cutouts are normally required in-band heaters for clearance for thermocouple probes or holding bolts. An oversize gap can in many cases serve the same purpose, saving the expense of the hole.
Using the center of the gap as a starting point, specify the location of the CenterPoint of the hole or cutout in terms of degrees and the distance from the edge of the heater. In addition, state the size of the hole or cutout.
For critical hole and cutout locations, a detailed drawing will be required.
Hinged Two-Piece Band
The Hinged Two-Piece Band Heater is connected with a continuous hinge for easy installation and removal. This heater can be opened and closed as often as is necessary. The preferred method of clamping is latch and trunnion. It is available with any screw or lead variation. When ordering, specify watts and volts each half.
Minimum Width: 1-3/8″ (34.9 mm)
Ring Heaters
When ordering Ring Heaters, specify inside and outside diameters. If mounting holes are required, specify location and hole size. For critical hole and cutout locations, a detailed drawing will be required.
Cone Shapes
Cone Shaped Heaters are normally used for special heating applications when heat is required for hoppers or funnels. They are made strictly to customer specifications. The preferred method of attachment is with built-in bracket clamping. When ordering or for quoting purposes, supply a detailed drawing or sample part. Include the top ID, bottom ID, and the vertical rise or heater width.
Special Custom Designs
No other heater band has the design and manufacturing flexibility of mica insulated heaters. Tempco’s flexible CNC sheet metal fabricating machines, custom-developed engineering programs with built-in intelligence, and experienced and talented engineering staff allow us to push the limits on band heater designs.
As a custom heating element manufacturer, we recognize that many applications require non-standard and unique designs. At Tempco, we are constantly challenged by our customers to solve their heating applications. When you have a special application and you want someone to work who has a “think outside the box” mentality, call Tempco.
Three-Phase
On very high wattage band heaters it would be advantageous to set up the wiring three-phase to reduce the current load across a single conductor. Three-Phase wiring is available on select clamping/construction or termination variation (termination location is subject to engineering approval).
Min. ID: 3″ (76.2 mm)
Min. Width: 2″ (50.8 mm)
Dual Voltage
Band heaters can be designed using 3-wire series/parallel circuits for dual voltage applications. Whether the heater is run on a higher or lower voltage, the wattage will be the same. Dual Voltage wiring is available on any clamping/construction or termination variation.
Ground Terminal or Lead
For those applications requiring a separate ground terminal or lead attached to the heater sheath. A Ground Terminal or Lead is available on any clamping/construction or termination variation.
Single Phase/Three Phase
Duraband Heaters can be designed with multiple circuits to operate single or three-phase.
Built-In Thermocouples
Heaters can be manufactured with a Built-In Thermocouple to closely control the temperature of the heater. Type J or K thermocouples are available with fiberglass, wire braid or any other required insulation.
All Stainless Steel Construction
All Stainless Steel Construction Mica band heaters can be constructed with an external sheath made entirely from stainless steel. This allows the Duraband to reach the maximum temperature of 1200°F (650°C). All Stainless Steel Construction is available on any clamping/construction or termination variation.
Other Sheath Materials
Other sheath materials, such as rust-resistant steel, Monel®, aluminum, or copper are also available for unique applications.
Electrical Plugs
Industry-standard NEMA Twist-Lock® electrical plugs are available. The plugs can be attached to fiberglass leads, armor cable or wire braid. Electrical Plugs can be added to any clamping/construction or termination variation.
Terminal Lugs
Various types of crimp terminals can be attached to the heater leads to make wiring into applications quick and easy. High temperature 1200°F (649°C) ring terminals and nylon or PVC insulated terminals are available. Spade, ring, and right-angle or straight quick disconnect type terminals can be attached to the leads.
Sinuated Element
An alternative to wound ribbon core heaters is the sinuated heater element. In this type of construction, the heating element resistance wire is sinuated, or “formed” back and forth without a middle core layer of mica insulation. The heating element is then sandwiched between two layers of specially selected mica insulation to provide excellent thermal conductivity and dielectric strength. The sinuated formed element lends itself to lower temperature and watt density applications where high watt density construction is not required.