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Duraband® (Micaband) Heaters
Construction Styles
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One-Piece Band Construction
The one-piece construction is available on any screw or lead termination and clamping variation. It can be used where band heaters can be slipped over the end of the cylinder.
Two-Piece Band Construction
The Duraband two-piece construction provides a built-in hinge, making handling and installation easier. It is used on large cylinders or where the heater cannot be slipped over the end of the cylinder. Two-piece band heaters are rated at watts and volts per each half when ordering.
One-Piece Expandable Band Construction
The one-piece expandable construction is available on any screw or lead and clamping variation and can be used where a one-piece band heater would have to be expanded to fit over the barrel during installation, rather than slipped over the end of the barrel.
Type NS: Partial Coverage Band with Built-In Brackets (2 Piece)
Partial coverage band heaters are normally required when holes and cutouts will not allow the heater to sufficiently clear the machine obstructions. The preferred method of construction is the Two-Piece Band Heater with Built-In Brackets as illustrated. The heater is screwed down to the cylinder at the ends and the built-in Low Thermal Expansion Strap pulls the heater tightly against the cylinder being heated. The standard center of hole to edge of heater dimension is 1/4″. When ordering, please provide the angle of coverage from center to center of the mounting screw holes as shown.
Type PS: Partial Coverage Band with Separate Strap (2 Piece)
The alternate method of partial coverage construction is the One-Piece Band Heater with a separate Two-Piece Strap. The two-piece strap itself is screwed down at the padded ends, allowing the heater to float between the pads as illustrated. When the strap is tightened, it will pull the heater against the cylinder being heated. The standard center of hole to edge of heater dimension is 1/4″. When ordering, please provide the angle of coverage from center to center of the mounting screw holes as shown.
Type NB: Partial Coverage Band with Built-In Strap Clamping (1-Piece)
Another alternate method of partial coverage construction. The one piece with clamp screws on both sides allows it to be secured to anchor points on either side of a barrel without drilling holes into the barrel.
Type RNB: Reverse Band Constuction with Bracket Clamping (1-Piece)
This construction style is used to heat cylindrical surfaces from the inside on heaters 5-1/2″ diameter and larger.
Type RNS: Reverse Band Construction with Bracket Clamping (2-Piece)
This construction style is used to heat cylindrical surfaces from the inside on heaters 10″ diameter and larger.
Type RTWL: Reverse Band Construction with Wedge Lock Clamping (1-Piece)
This construction style is used to heat cylindrical surfaces from the inside on heaters less than 5″ outside diameter.
Square or Rectangular Shape
Square or Rectangular band heaters are normally used for heating dies on plastic extruders, or the barrels of twin screw extruders. They can be made in either one- or two-piece construction but two-piece construction with Style 1 Clamping (see below) is recommended.
Hexagon Shape
Hexagon shaped band heaters are used on the hex shaped portion of the nozzle on injection molding machines. These types of heaters are strictly made to customer specifications with bent-up flange clamping only.
Clamping Options
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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 SLQD: Spring-Loaded Quick Disconnect, One-Piece Band
This construction style is a hybrid between the Spring Loaded Clamp with Built-In Bracket and the Latch and Trunnion style clamping. Utilizing a built in bracket and heavy duty flanges, this clamping style is durable and easy to work with in the field. The spring provides relief for thermal expansion and provides strong clamping for the band. This clamping style is available with either lead or screw terminal type terminations.
Type NSLQD: Spring-Loaded Quick Disconnect, Two-Piece Band
This construction style is a hybrid between the Spring Loaded Clamp with Built-In Bracket and the Latch and Trunnion style clamping. Utilizing a built in bracket and heavy duty flanges, this clamping style is durable and easy to work with in the field. The spring provides relief for thermal expansion and provides strong clamping for the band. This clamping style is available with either lead or screw terminal type terminations.
Type NELQD: Spring-Loaded Quick Disconnect, One-Piece Expandable Band
This construction style is a hybrid between the Spring Loaded Clamp with Built-In Bracket and the Latch and Trunnion style clamping. Utilizing a built in bracket and heavy duty flanges, this clamping style is durable and easy to work with in the field. The spring provides relief for thermal expansion and provides strong clamping for the band. This clamping style is available with either lead or screw terminal type terminations.
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 in 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 in 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 in 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 narrow band 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 narrow band 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 narrow band heaters with small diameters.
Electrical Terminations
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Type T1: Screw Terminals, One-Piece Band
Standard Termination Location: each side of gap; center of width
Minimum Inside Diameter: 2″ (50.8 mm)
Minimum Width: 7/8″ (22.2 mm)
Post Terminals: 10-32 standard except 8-32 on < 1" wide heaters & heaters with ID < 3"
Max. Volts/Amps: 480VAC/ 25A (10-32) or 20A (8-32)
Type T1: Screw Terminals, Two-Piece Band
Standard Termination Location: next to gaps on each half; center of width
Minimum Inside Diameter: 2″ (50.8 mm)
Minimum Width: 7/8″ (22.2 mm)
Post Terminals: 10-32 standard except 8-32 on < 1" wide heaters & heaters with ID < 3"
Max. Volts/Amps: 480VAC/25A (10-32) or 20A (8-32) each half
Type T1: Screw Terminals, One-Piece Expandable Band
Standard Termination Location: each side of gap; center of width
Minimum Inside Diameter: 2-1/2″ (63.5 mm)
Minimum Width: 1-1/4″ (31.8 mm)
Post Terminals: 10-32 standard except 8-32 on heaters with ID < 3"
Max. Volts/Amps: 480VAC/ 25A (10-32) or 20A (8-32)
Type T2: Screw Terminals, One-Piece Band
Standard Termination Location: next to gap; center of width
Minimum Inside Diameter: 2″ (50.8 mm)
Minimum Width: 7/8″ (22.2 mm)
Post Terminals: 10-32 standard except 8-32 on < 1" wide heaters & heaters with ID < 3"
Maximum Volts/Amps: 480VAC/ 25A (10-32) or 20A (8-32)
Type T2: Screw Terminals, Two-Piece Band
Standard Termination Location: next to same gap on each half; center of width
Minimum Inside Diameter: 2″ (50.8 mm)
Minimum Width: 7/8″ (22.2 mm)
Post Terminals: 10-32 standard except 8-32 on < 1" wide heaters & heaters with ID < 3"
Max. Volts/Amps: 480VAC/ 25A (10-32) or 20A (8-32) each half
Type T2: Screw Terminals, One-Piece Expandable Band
Standard Termination Location: next to gap; center of width
Minimum Inside Diameter: 2-1/2″ (63.5 mm)
Minimum Width: 1-1/4″ (31.8 mm)
Post Terminals: 10-32 standard except 8-32 on heaters with ID < 3"
Max. Volts/Amps: 480VAC/ 25A (10-32) or 20A (8-32)
Type T3: Screw Terminals, One-Piece Band
Standard Termination Location: next to gap; across center of width
Minimum Inside Diameter: 2″ (50.8 mm)
Minimum Width: 2″ (50.8 mm)
Post Terminals: 10-32 standard except 8-32 on 2″ to 2-1/2″ wide heaters & heaters with ID < 3"
Maximum Volts/Amps: 480VAC/25A (10-32) or 20A (8-32)
Type T3: Screw Terminals, Two-Piece Band
Standard Termination Location: next to same gap on each half; across center of width
Minimum Inside Diameter: 2″ (50.8 mm)
Minimum Width: 2″ (50.8 mm)
Post Terminals: 10-32 standard except 8-32 on 2″ to 2-1/2″ wide heaters & heaters with ID < 3"
Maximum Volts/Amps: 480VAC/ 25A (10-32) or 20A (8-32) each half
Type T3: Screw Terminals, One-Piece Expandable Band
Standard Termination Location: next to gap; across center of width
Minimum Inside Diameter: 2-1/2″ (63.5 mm)
Minimum Width: 2″ (50.8 mm)
Post Terminals: 10-32 standard except 8-32 on 2″ to 2-1/2″ wide heaters & heaters with ID < 3"
Maximum Volts/Amps: 480VAC/ 25A (10-32) or 20A (8-32)
Type B1: Button Terminals, One-Piece Band
Standard Termination Location: each side of gap; center of width
Minimum Inside Diameter: 2″ (50.8 mm)
Minimum Width: 1-1/2″ (38.1 mm)
Screw Size: 10-32 standard except 6-32 on IDs < 5"
Maximum Volts: 480VAC
Maximum Amps: 25A (10-32) or 20A (6-32)
Type B1: Button Terminals, Two-Piece Band
Standard Termination Location: next to gaps on each half; center of width
Minimum Inside Diameter: 2″ (50.8 mm)
Minimum Width: 1-1/2″ (38.1 mm)
Screw Size: 10-32 standard except 6-32 on IDs < 5"
Maximum Volts/Amps: 480VAC/ 25A (10-32) or 20A (6-32) each half
Type B1: Button Terminals, One-Piece Expandable Band
Standard Termination Location: each side of gap; center of width
Minimum Inside Diameter: 2-1/2″ (63.5 mm)
Minimum Width: 1-1/2″ (38.1 mm)
Screw Size: 10-32 standard except 6-32 on IDs < 5"
Maximum Volts/Amps: 480VAC/ 25A (10-32) or 20A (6-32)
Type B2: Button Terminals, One-Piece Band
Standard Termination Location: next to gap; center of width
Minimum Inside Diameter: 2″ (50.8 mm)
Minimum Width: 1-1/2″ (38.1 mm)
Screw Size: 10-32 standard except 6-32 on IDs < 5"
Maximum Volts: 480VAC
Maximum Amps: 25A (10-32) or 20A (6-32)
Type B2: Button Terminals, Two-Piece Band
Standard Termination Location: next to same gap on each half; center of width
Minimum Inside Diameter: 2″ (50.8 mm
Minimum Width: 1-1/2″ (38.1 mm)
Screw Size: 10-32 standard except 6-32 on IDs < 5"
Maximum Volts/Amps: 480VAC/ 25A (10-32) or 20A (6-32) each half
Type B2: Button Terminals, One-Piece Expandable Band
Standard Termination Location: next to gap; center of width
Minimum Inside Diameter: 2-1/2″ (63.5 mm)
Minimum Width: 1-1/2″ (38.1 mm)
Screw Size: 10-32 standard except 6-32 on IDs < 5"
Maximum Volts/Amps: 480VAC/ 25A (10-32) or 20A (6-32)
Type B3: Button Terminals, One-Piece Band
Standard Termination Location: next to gap; across center of width
Minimum Inside Diameter: 2″ (50.8 mm)
Minimum Width: 2-3/8″ (60.3 mm)
Screw Size: 10-32 standard except 6-32 on IDs < 5"
Maximum Volts: 480VAC
Maximum Amps: 25A (10-32) or 20A (6-32)
Type B3: Button Terminals, Two-Piece Band
Standard Termination Location: next to same gap on each half; across center of width
Minimum Inside Diameter: 2″ (50.8 mm)
Minimum Width: 2-3/8″ (60.3 mm)
Screw Size: 10-32 standard except 6-32 on IDs < 5"
Maximum Volts/Amps: 480VAC/ 25A (10-32) or 20A (6-32) each half
Type B3: Button Terminals, One-Piece Expandable Band
Standard Termination Location: next to gap; across center of width
Minimum Inside Diameter: 2-1/2″ (63.5 mm)
Minimum Width: 2-3/8″ (60.3 mm)
Screw Size: 10-32 standard except 6-32 on IDs < 5"
Maximum Volts/Amps: 480VAC/ 25A (10-32) or 20A (6-32)
Type L1: Straight Lead Wires, One-Piece Band
Standard Termination Location: next to gap; center of width
Minimum Inside Diameter: 2″ (50.8 mm)
Minimum Width: 1″ (25.4 mm)
Maximum Volts: 480VAC
Maximum Amps: 12.5A
Type L1: Straight Lead Wires, Two-Piece Band
Standard Termination Location: next to same gap on each half; center of width:
Minimum Inside Diameter: 2″ (50.8 mm):
Minimum Width: 1″ (25.4 mm):
Maximum Volts: 480V each half
Maximum Amps: 12.5A each half
Type L1: Straight Lead Wires, One-Piece Expandable Band
Standard Termination Location: next to gap; center of width
Minimum Inside Diameter: 2-1/2″ (63.5 mm)
Minimum Width: 1-1/4″ (31.8 mm)
Maximum Volts: 480V
Maximum Amps: 12.5A
Type L2: Straight Lead Wires, One-Piece Band
Standard Termination Location: each side of gap; edge of width
Minimum Inside Diameter: 7/8″ (22.2 mm)
Minimum Width: 3/4″ (19.1 mmL
Maximum Volts: 480VAC
Maximum Amps: 12.5A
Type L2: Straight Lead Wires, Two-Piece Band
Standard Termination Location: each side of each gap; edge of width
Minimum Inside Diameter: 2″ (50.8 mm)
Minimum Width: 3/4″ (19.1 mm)
Maximum Volts: 480V each half
Maximum Amps: 12.5A each half
Type L2: Straight Lead Wires, One-Piece Expandable Band
Standard Termination Location: each side of gap; edge of width
Minimum Inside Diameter: 2-1/2″ (63.5 mm) Minimum Width: 1-1/4″ (31.8 mm)
Maximum Volts: 480V
Maximum Amps: 12.5A
Type L4: Straight Lead Wires, One-Piece Band
Standard Termination Location: same side of gap; edge of width
Minimum Inside Diameter: 7/8″ (22.2 mm)
Minimum Width: 1″ (25.4 mm)
Maximum Volts: 480VAC
Maximum Amps: 12.5A
Type L4: Straight Lead Wires, Two-Piece Band
Standard Termination Location: each side of same gap; center of width
Minimum Inside Diameter: 2″ (50.8 mm)
Minimum Width: 1″ (25.4 mm)
Maximum Volts: 480V each half
Maximum Amps: 12.5A each half
Type L4: Straight Lead Wires, One-Piece Expandable Band
Standard Termination Location: Same side of gap; edge of width
Minimum Inside Diameter: 2-1/2″ (63.5 mm)
Minimum Width: 1-1/4″ (31.8 mm)
Maximum Volts: 480VAC
Maximum Amps: 12.5A
Type W1 & W1T: Straight Wire Braid Leads, One-Piece Band
Standard Termination Location: next to gap; center of width
Minimum Inside Diameter: 2″ (50.8 mm)
Minimum Width: 1″ (25.4 mm)
Maximum Volts: 480VAC
Maximum Amps: 12.5A
Type W1 & W1T:: Straight Wire Braid Leads, Two-Piece Band
Standard Termination Location: next to same gap on each half; center of width
Minimum Inside Diameter: 2″ (50.8 mm)
Minimum Width: 1″ (25.4 mm)
Maximum Volts: 480VAC each half
Maximum Amps: 12.5A each half
Type W1 & W1T:: Straight Wire Braid Leads, One-Piece Expandable Band
Standard Termination Location: next to gap; center of width
Minimum Inside Diameter: 2-1/2″ (63.5 mm)
Minimum Width: 1-1/4″ (31.8 mm)
Maximum Volts: 480VAC
Maximum Amps: 12.5A
Type W2: Wire Braid Leads, One-Piece Band
Standard Termination Location: opposite the gap; edge of width
Minimum Inside Diameter: 7/8″ (22.2 mm)
Minimum Width: 1-1/8″ (28.6 mm)
Maximum Volts: 480VAC
Maximum Amps: 12.5A
Type W2: Wire Braid Leads, Two-Piece Band
Standard Termination Location: center of each half; edge of width
Minimum Inside Diameter: 2″ (50.8 mm)
Minimum Width: 1-1/8″ (28.6 mm)
Maximum Volts: 480VAC each half
Maximum Amps: 12.5A each half
Type W2: Wire Braid Leads, One-Piece Expandable Band
Standard Termination Location: opposite the gap offset 1″; edge of width
Minimum Inside Diameter: 2-1/2″ (63.5 mm)
Minimum Width: 1-1/8″ (28.6 mm)
Maximum Volts: 480VAC
Maximum Amps: 12.5A
Type W3: Single Wire Braid Leads, One-Piece Band
Standard Termination Location: each side of gap; edge of width
Minimum Inside Diameter: 3/4″ (19.1 mm)
Minimum Width: 7/8″ (22.2 mm)
Maximum Volts: 480VAC
Maximum Amps: 12.5A
Type W3: Single Wire Braid Leads, Two-Piece Band
Standard Termination Location: each side of each gap; edge of width
Minimum Inside Diameter: 2″ (50.8 mm)
Minimum Width: 3/4″ (19.1 mm)
Maximum Volts: 480VAC each half
Maximum Amps: 12.5A each half
Type W3: Single Wire Braid Leads, One-Piece Expandable Band
Standard Termination Location: each side of gap; edge of width
Minimum Inside Diameter: 2-1/2″ (63.5 mm)
Minimum Width: 1-1/4″ (31.8 mm)
Maximum Volts: 480VAC
Maximum Amps: 12.5A
Type W4: Wire Braid Leads On One Side, One-Piece Band
Standard Termination Location: next to gap; edge of width
Minimum Inside Diameter: 7/8″ (22.2 mm)
Minimum Width: 1″ (25.4 mm)
Maximum Volts: 480VAC
Maximum Amps: 12.5A
Type W4: Wire Braid Leads On One Side, Two-Piece Band
Standard Termination Location: next to same gap on each half; edge of width
Minimum Inside Diameter: 2″ (50.8 mm)
Minimum Width: 1″ (25.4 mm)
Maximum Volts: 480VAC each half
Maximum Amps: 12.5A each half
Type W4: Wire Braid Leads On One Side, One-Piece Expandable Band
Standard Termination Location: next to gap; edge of width
Minimum Inside Diameter: 2-1/2″ (63.5 mm)
Minimum Width: 1-1/4″ (31.8 mm)
Maximum Volts: 480VAC
Maximum Amps: 12.5A
Type W2M: Right-Angle Wire Braid Leads, 90° to Heater, One-Piece Band
Standard Termination Location: opposite of gap; center of width
Minimum Inside Diameter: 1-1/2″ (38.1 mm)
Minimum Width: 1-1/4″ (31.8 mm)
Maximum Volts: 480VAC
Maximum Amps: 12.5A
Type W2M: Right-Angle Wire Braid Leads, 90° to Heater, Two-Piece Band
Standard Termination Location: next to same gap on each half; center of width
Minimum Inside Diameter: 2″ (50.8 mm)
Minimum Width: 1-1/4″ (31.8 mm)
Maximum Volts: 480VAC each half
Maximum Amps: 12.5A each half
Type W2M: Right-Angle Wire Braid Leads, 90° to Heater, One-Piece Expandable Band
Standard Termination Location: next to gap; center of width
Minimum Inside Diameter: 2-1/2″ (63.5 mm)
Minimum Width: 1-1/4″ (31.8 mm)
Maximum Volts: 480VAC
Maximum Amps: 12.5A
Type W5M: Right-Angle Wire Braid Leads, Parallel to Heater, One-Piece Band
Standard Termination Location: opposite of gap; center of width
Minimum Inside Diameter: 1-1/2″ (38.1 mm)
Minimum Width: 1-1/4″ (31.8 mm)
Maximum Volts: 480VAC
Maximum Amps: 12.5A
Type W5M: Right-Angle Wire Braid Leads, Parallel to Heater, Two-Piece Band
Standard Termination Location: next to same gap on each side; center of width
Minimum Inside Diameter: 2″ (50.8 mm)
Minimum Width: 1-1/4″ (31.8 mm)
Maximum Volts: 480VAC each half
Maximum Amps: 12.5A each half
Type W5M: Right-Angle Wire Braid Leads, Parallel to Heater, One-Piece Expandable Band
Standard Termination Location: next to gap; center of width
Minimum Inside Diameter: 2-1/2″ (63.5 mm)
Minimum Width: 1-1/4″ (31.8 mm)
Maximum Volts: 480VAC
Maximum Amps: 12.5A
Type R1: Straight Armor Cable, One-Piece Band
Standard Termination Location: next to gap; center of width
Minimum Inside Diameter: 1-1/2″ (38.1 mm)
Minimum Width: 1″ (25.4 mm)
Maximum Volts: 480VAC
Maximum Amps: 12.5A
Type R1: Straight Armor Cable, Two-Piece Band
Standard Termination Location: next to same gap on each half; center of width
Minimum Inside Diameter: 2″ (50.8 mm)
Minimum Width: 1″ (25.4 mm)
Maximum Volts/Amps: 480VAC/12.5A each half
Type R1: Straight Armor Cable, One-Piece Expandable Band
Standard Termination Location: next to gap; center of width
Minimum Inside Diameter: 2-1/2″ (65.3 mm)
Minimum Width: 1-1/4″ (31.8 mm)
Maximum Volts/Amps: 480VAC/12.5A
Type R2: Right-Angle Armor Cable, One-Piece Band
Standard Termination Location: next to gap; center of width
Minimum Inside Diameter: 1-1/2″ (38.1 mm)
Minimum Width: 1-1/4″ (31.8 mm)
Maximum Volts: 480VAC
Maximum Amps: 12.5A
Type R2: Right-Angle Armor Cable, Two-Piece Band
Standard Termination Location: next to same gap on each half; center of width
Minimum Inside Diameter: 2″ (50.8 mm)
Minimum Width: 1-1/4″ (31.8 mm)
Maximum Volts/Amps: 480VAC/12.5A each half
Type R2: Right-Angle Armor Cable, One-Piece Expandable Band
Standard Termination Location: next to gap; center of width
Minimum Inside Diameter: 2-1/2″ (63.5 mm)
Minimum Width: 1-1/4″ (31.8 mm)
Maximum Volts/Amps: 480VAC/12.5A
Type R3: Removable Armor Cable, One-Piece Band
Standard Termination Location: next to gap; center of width
Minimum Inside Diameter: 1-1/2″ (38.1 mm)
Minimum Width: 1-1/4″ (31.7 mm)
Maximum Volts/Amps: 480VAC/12.5A
Type R3: Removable Armor Cable, Two-Piece Band
Standard Termination Location: next to same gap on each half; center of width
Minimum Inside Diameter: 2″ (50.8 mm)
Minimum Width: 1-1/4″ (31.7 mm)
Maximum Volts/Amps: 480VAC/12.5A each half
Type R3: Removable Armor Cable, One-Piece Expandable Band
Standard Termination Location: next to gap; center of width
Minimum Inside Diameter: 2-1/2″ (63.5 mm)
Minimum Width: 1-1/4″ (31.8 mm)
Maximum Volts/Amps: 480VAC/12.5A
Type S1: Lead Wire Spring Strain Relief, One-Piece Band
Standard Termination Location: next to gap; center of width
Minimum Inside Diameter: 2″ (50.8 mm)
Minimum Width: 1-1/4″ (31.8 mm)
Maximum Volts: 480VAC
Maximum Amps: 12.5A
Type S1: Lead Wire Spring Strain Relief, Two-Piece Band
Standard Termination Location: next to same gap on each half; center of width
Minimum Inside Diameter: 2″ (50.8 mm)
Minimum Width: 1-1/4″ (31.75 mm)
Maximum Volts/Amps: 480VAC/12.5A each half:
Type S1: Lead Wire Spring Strain Relief, One-Piece Expandable Band
Standard Termination Location: next to gap; center of width
Minimum Inside Diameter: 2-1/2″ (63.5 mm)
Minimum Width: 1-1/4″ (31.75 mm)
Maximum Volts/Amps: 480VAC/12.5A
Type C2: Standard Terminal Boxes, One-Piece Band
Standard Termination Location: next to gap; center of width
Minimum Inside Diameter: 2-1/2″ (63.5 mm)
Minimum Width: 1″ (25.4 mm) Heater widths between 1″ and 2-1/2″ require a minimum ID of 5-1/2″ or greater.
Maximum Volts/Amps: 480VAC/25A
Type C2: Standard Terminal Boxes, Two-Piece Band
Standard Termination Location: next to same gap on each half; center of width
Minimum Inside Diameter: 3″ (76.2 mm)
Minimum Width: 1″ (25.4 mm) Heater widths between 1″ and 2-1/2″ require a minimum ID of 5-1/2″ or greater.
Max. Volts/Amps: 480VAC/25A each half
Type C2: Standard Terminal Boxes, One-Piece Expandable Band
Standard Termination Location: next to gap; center of width
Minimum Inside Diameter: 2-1/2″ (63.5 mm)
Minimum Width: 1″ (25.4 mm) Heater widths between 1″ and 2-1/2″ require a minimum ID of 5-1/2″ or greater.
Maximum Volts/Amps: 480VAC/25A
Type C5: Low-Profile Terminal Boxes, One-Piece Band
Standard Termination Location: next to gap; center of width
Minimum Inside Diameter: 2-1/2″ (63.5 mm)
Minimum Width: 1″ (25.4 mm) Heater widths between 1″ and 2-1/2″ require a minimum ID of 5-1/2″ or greater.
Maximum Volts/Amps: 480VAC/25A
Type C5: Low-Profile Terminal Boxes, Two-Piece Band
Standard Termination Location: next to same gap on each half; center of width
Minimum Inside Diameter: 3″ (76.2 mm)
Minimum Width: 1″ (25.4 mm) Heater widths between 1″ and 2-1/2″ require a minimum ID of 5-1/2″ or greater.
Max. Volts/Amps: 480VAC/25A each half
Type C5: Low-Profile Terminal Boxes, One-Piece Expandable Band
Standard Termination Location: next to gap; center of width
Minimum Inside Diameter: 2-1/2″ (63.5 mm)
Minimum Width: 1″ (25.4 mm) Heater widths between 1″ and 2-1/2″ require a minimum ID of 5-1/2″ or greater
Maximum Volts/Amps: 480VAC/25A
Type P1: Quick Disconnect Plugs, One-Piece Band
Standard Termination Location: next to gap; center of width
Minimum Inside Diameter: 2″ (50.8 mm)
Minimum Width: 1-1/2″ (38.1 mm)
Plug Electrical Ratings: 2-Pole 3-Wire Grounding
Maximum Volts: 250 VAC
Maximum Amps: 16A
Maximum Temperature: 392°F (200°C)
Type P1: Quick Disconnect Plugs, Two-Piece Band
Standard Termination Location: next same gap on each half; center of width
Minimum Inside Diameter: 2″ (50.8 mm)
Minimum Width: 1-1/2″ (38.1 mm)
Plug Electrical Ratings: 2-Pole 3-Wire Grounding
Maximum Volts: 250 VAC
Maximum Amps: 16A
Maximum Temperature: 392°F (200°C)
Type P1: Quick Disconnect Plugs, One-Piece Expandable Band
Standard Termination Location: next to gap; center of width.
Minimum Inside Diameter: 2-1/2″ (63.5 mm)
Minimum Width: 1-1/2″ (38.1 mm)
Plug Electrical Ratings: 2-Pole 3-Wire Grounding
Maximum Volts: 250 VAC
Maximum Amps: 16A
Maximum Temperature: 572°F (300°C)
Type P2: Quick Disconnect Plugs, Low-Profile, One-Piece Band
Standard Termination Location: next to gap; center of width
Minimum Inside Diameter: 3″ (76.2 mm)
Minimum Width: 2-1/2″ (63.5 mm)
Plug Electrical Ratings: 2-Pole 3-Wire Grounding
Maximum Volts: 250 VAC
Maximum Amps: 16A
Maximum Temperature: 392°F (200°C)
Type P2: Quick Disconnect Plugs, Low-Profile, Two-Piece Band
Standard Termination Location: next same gap on each half; center of width
Minimum Inside Diameter: 3″ (76.2 mm)
Minimum Width: 2-1/2″ (63.5 mm)
Plug Electrical Ratings: 2-Pole 3-Wire Grounding
Maximum Volts: 250 VAC
Maximum Amps: 16A
Maximum Temperature: 572°F (300°C)
Type P2: Quick Disconnect Plugs, Low-Profile, One-Piece Expandable Band
Standard Termination Location: next to gap on each half; center of width
Minimum Inside Diameter: 3″ (76.2 mm)
Minimum Width: 2-1/2″ (63.5 mm)
Plug Electrical Ratings: 2-Pole 3-Wire Grounding
Maximum Volts: 250 VAC
Maximum Amps: 16A
Maximum Temperature: 572°F (300°C)
Type P3: DIN 49458 A/B Quick Disconnect Plugs, Vertical, One-Piece Band
Standard Termination Location: next to gap; center of width
Minimum Inside Diameter: 3″ (76.2 mm)
Minimum Width: 2-1/2″ (63.5 mm)
Plug Electrical Ratings: 2-Pole 3-Wire Grounding
Maximum Volts: 250 VAC
Maximum Amps: 16A
Maximum Temperature: 392°F (200°C)
Type P3: DIN 49458 A/B Quick Disconnect Plugs, Vertical, Two-Piece Band
Standard Termination Location: next to same gap on each half; center of width
Minimum Inside Diameter: 3″ (76.2 mm)
Minimum Width: 2-1/2″ (63.5 mm)
Plug Electrical Ratings: 2-Pole 3-Wire Grounding
Maximum Volts: 250 VAC
Maximum Amps: 16A
Maximum Temperature: 392°F (200°C)
Type P3: DIN 49458 A/B Quick Disconnect Plugs, Vertical, One-Piece Expandable Band
Standard Termination Location: next to same gap on each half; center of width
Minimum Inside Diameter: 3″ (76.2 mm)
Minimum Width: 2-1/2″ (63.5 mm)
Plug Electrical Ratings: 2-Pole 3-Wire Grounding
Maximum Volts: 250 VAC
Maximum Amps: 16A
Maximum Temperature: 392°F (200°C)
Type P4: DIN 49458 A/B Quick Disconnect Plugs, Horizontal, One-Piece Band
Standard Termination Location: next to gap; center of width
Minimum Inside Diameter: 3″ (76.2 mm)
Minimum Width: 2-1/2″ (63.5 mm)
Plug Electrical Ratings: 2-Pole 3-Wire Grounding
Maximum Volts: 250 VAC
Maximum Amps: 16A
Maximum Temperature: 392°F (200°C)
Type P4: DIN 49458 A/B Quick Disconnect Plugs, Horizontal, Two-Piece Band
Standard Termination Location: next to same gap on each half; center of width
Minimum Inside Diameter: 3″ (76.2 mm)
Minimum Width: 2-1/2″ (63.5 mm)
Plug Electrical Ratings: 2-Pole 3-Wire Grounding
Maximum Volts: 250 VAC
Maximum Amps: 16A
Maximum Temperature: 392°F (200°C)
Type P4: DIN 49458 A/B Quick Disconnect Plugs, Horizontal, One-Piece Expandable Band
Standard Termination Location: next to gap; center of width
Minimum Inside Diameter: 3″ (76.2 mm)
Minimum Width: 2-1/2″ (63.5 mm)
Plug Electrical Ratings: 2-Pole 3-Wire Grounding
Maximum Volts: 250 VAC
Maximum Amps: 16A
Maximum Temperature: 392°F (200°C)
Additional Options
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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, termainsl 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.
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.
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.
