One-Piece Band Construction

One-piece heaters provide the most heated surface area but can only be used where the entire heater can be slipped over the end of the barrel. One-piece heaters have built-in, full-width clamping bars.

Two-Piece Band Construction

Two-piece construction satisfies the need for a heater that can be placed anywhere along the machine barrel and is recommended for larger diameter heaters. The two-piece construction style also provides dual voltage capability as heater halves may be wired together either in series or parallel. Two-piece heaters are rated at full voltage and 1/2 the total wattage for each half.

One-Piece Expandable Band Construction

The expandable construction style allows the heater to be opened up and placed anywhere along the machine barrel, as well as minimizes the unheated area as compared to a two-piece heater.

With two heater circuits in a common case this heater naturally lends itself to a dual voltage system. Expandable heaters are rated for each circuit at full voltage and one half of the total wattage.

Partial Coverage Band with Built-In Brackets (2 Piece)

Partial coverage band heaters are required when an obstruction on the barrel would interfere with a full coverage band.

The preferred method of construction is the 2-piece Band Heater with Built-In Brackets. The heater is bolted 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".

Partial Coverage Band with Separate Strap (1 Piece)

The alternate method of partial coverage construction is the 1-piece Band Heater with a separate 2-piece strap.

The 2-piece strap itself is bolted at the padded ends, allowing the heater to float between the pads as illustrated below. When tightening the strap, it will pull the heater against the cylinder being heated.

The standard center of hole to edge of heater dimension is 1/4".

Type NB: Standard Built-In Clamping Strap, One-Piece Band

The clamping brackets of the Mi-Plus Heater are formed from its outer sheath, producing a unique Built-In Strap. Clamping power is generated through barrel nuts and 1/4-20 alloy steel socket head cap screws, which are an integral part of the Built-In Strap.

Type NS: Standard Built-In Clamping Strap, Two-Piece Band

The clamping brackets of the Mi-Plus Heater are formed from its outer sheath, producing a unique Built-In Strap. Clamping power is generated through barrel nuts and 1/4-20 alloy steel socket head cap screws, which are an integral part of the Built-In Strap.

Type NE: Standard Built-In Clamping Strap, One-Piece Expandable Band

The clamping brackets of the Mi-Plus Heater are formed from its outer sheath, producing a unique Built-In Strap. Clamping power is generated through barrel nuts and 1/4-20 alloy steel socket head cap screws, which are an integral part of the Built-In Strap.

Type SB: Separate Clamping Straps, One-Piece Band

This option uses a separate strap to properly clamp the heater. A separate strap is useful when clearance is limited or there is an obstruction. Separate straps are made strictly to customer specifications.

Type SS: Separate Clamping Straps, Two-Piece Band

This option uses a separate strap to properly clamp the heater. A separate strap is useful when clearance is limited or there is an obstruction. Separate straps are made strictly to customer specifications.

Type SE: Separate Clamping Straps, One-Piece Expandable Band

This option uses a separate strap to properly clamp the heater. A separate strap is useful when clearance is limited or there is an obstruction. Separate straps are made strictly to customer specifications.

Type LB: Low-Profile Built-In Clamping Strap, One-Piece Band

When space is limited use Tempco's low profile clamping. This compact design uses 10-32 alloy socket head cap screws. Standard on all Mi-Plus heaters less than 3" in diameter.

Type LS: Low-Profile Built-In Clamping Strap, Two-Piece Band

When space is limited use Tempco's low profile clamping. This compact design uses 10-32 alloy socket head cap screws. Standard on all Mi-Plus heaters less than 3" in diameter.

Type LE: Low-Profile Built-In Clamping Strap, One-Piece Expandable Band

When space is limited use Tempco's low profile clamping. This compact design uses 10-32 alloy socket head cap screws. Standard on all Mi-Plus heaters less than 3" in diameter.

Type OB: Outrigger Built-In Clamping Strap, One-Piece Band

This design is unique to 1" wide heaters from 1-3/8" diameter and greater. Two 8-32 alloy socket head cap screws are used to give 1" wide heaters the required clamping power.

Type OS: Outrigger Built-In Clamping Strap, Two-Piece Band

This design is unique to 1" wide heaters from 1-3/8" diameter and greater. Two 8-32 alloy socket head cap screws are used to give 1" wide heaters the required clamping power.

Type SL: Spring Loaded Built-In Clamping Strap, One-Piece Band

Spring loaded clamping with alloy steel socket head cap screws is standard on heaters over 8" in diameter and offered as an option on any heater with standard brackets. The extra heavy duty compression springs serve to combat thermal expansion of the heater by self adjustment, thereby ensuring excellent contact of the heater surface with the machine barrel or die. This type of clamping is also useful on heaters that are mounted vertically.

Type NSL: Spring Loaded Built-In Clamping Strap, Two-Piece Band

Spring loaded clamping with alloy steel socket head cap screws is standard on heaters over 8" in diameter and offered as an option on any heater with standard brackets. The extra heavy duty compression springs serve to combat thermal expansion of the heater by self adjustment, thereby ensuring excellent contact of the heater surface with the machine barrel or die. This type of clamping is also useful on heaters that are mounted vertically.

Type NEL: Spring Loaded Built-In Clamping Strap, One-Piece Expandable Band

Spring loaded clamping with alloy steel socket head cap screws is standard on heaters over 8" in diameter and offered as an option on any heater with standard brackets. The extra heavy duty compression springs serve to combat thermal expansion of the heater by self adjustment, thereby ensuring excellent contact of the heater surface with the machine barrel or die. This type of clamping is also useful on heaters that are mounted vertically.

Type WB: Weld-On Bracket, One-Piece Band

The Mi-Plus is available without built-in brackets. For this option, brackets are welded onto the heater plate at user-specified locations. A weld-on bracket is useful when clearance is limited or there is an obstruction for using separate straps. Consult Tempco with your requirements.

Type WS: Weld-On Bracket, Two-Piece Band

The Mi-Plus is available without built-in brackets. For this option, brackets are welded onto the heater plate at user-specified locations. A weld-on bracket is useful when clearance is limited or there is an obstruction for using separate straps. Consult Tempco with your requirements.

Type WE: Weld-On Bracket, One-Piece Expandable Band

The Mi-Plus is available without built-in brackets. For this option, brackets are welded onto the heater plate at user-specified locations. A weld-on bracket is useful when clearance is limited or there is an obstruction for using separate straps. Consult Tempco with your requirements.

Type T2: Screw Terminals, One-Piece Band

Standard Termination Location: opposite the gap; center of width

Minimum Inside Diameter: 2-1/2" (63.5 mm)

Minimum Width: 1-1/2" (38.1 mm)

Post Terminals: 10-32 or 8-32

Maximum Volts: 480VAC

Maximum Amps: 25A (10-32) or 20A (8-32)

Type T2: Screw Terminals, Two-Piece Band

Standard Termination Location: center each half; center of width

Minimum Inside Diameter: 3" (76.2 mm)

Minimum Width: 1-1/2" (38.1 mm)

Post Terminals: 10-32 or 8-32

Maximum Volts/Amps: 480VAC/ 25A (10-32) or 20A (8-32) each half

Type T2: Screw Terminals, One-Piece Expandable Band

Standard Termination Location: center each half; center of width

Minimum Inside Diameter: 2-1/2" (63.5 mm)

Minimum Width: 1-1/2" (38.1 mm)

Post Terminals: 10-32 or 8-32

Maximum Volts/Amps: 480VAC/ 25A (10-32) or 20A (8-32) each half

Type T3X: Screw Terminals, One-Piece Band

Standard Termination Location: opposite the gap; across center of width

Minimum Inside Diameter: 2-1/2" (63.5 mm)

Minimum Width:
  with 10-32 Post Terminals — 2-1/2" (63.5 mm)
  with 8-32 Post Terminals — 2" (50.8 mm)

Maximum Volts/Amps: 480VAC/ 25A (10-32) or 20A (8-32) each half

Type T3X: Screw Terminals, Two-Piece Band

Standard Termination Location: opposite the gap; across center of width

Minimum Inside Diameter: 3" (76.2 mm)

Minimum Width:
  with 10-32 Post Terminals — 2-1/2" (63.5 mm)
  with 8-32 Post Terminals — 2" (50.8 mm)

Maximum Volts/Amps: 480VAC/ 25A (10-32) or 20A (8-32) each half

Type T3X: Screw Terminals, One-Piece Expandable Band

Standard Termination Location: opposite the gap; across center of width

Minimum Inside Diameter: 2-1/2" (63.5 mm)

Minimum Width:
  with 10-32 Post Terminals — 2-1/2" (63.5 mm)
  with 8-32 Post Terminals — 2" (50.8 mm)

Maximum Volts/Amps: 480VAC/ 25A (10-32) or 20A (8-32) each half

Type T3Y: Screw Terminals, Two-Piece Band

Standard Termination Location: next to same gap on each half; across center of width

Minimum Inside Diameter: 3" (76.2 mm)

Minimum Width:
  with 8-32 Post Terminals — 2" (50.8 mm)
  with 10-32 Post Terminals — 2-1/2" (63.5 mm)

Maximum Volts: 480VAC each half

Maximum Amps: 25A (10-32) or 20A (8-32) each hal

Type W1: Abrasion-Resistant Straight Wire Braid Leads, One-Piece Band

Standard Termination Location: opposite the gap; center of width

Minimum Inside Diameter: 1" (25.4 mm)

Minimum Width: 1" (25.4 mm)

Maximum Volts: 480VAC

Maximum Amps: 12.5

Type W1: Abrasion-Resistant Straight Wire Braid Leads, Two-Piece Band

Standard Termination Location: center of each half; center of width

Minimum Inside Diameter: 3" (76.2 mm)

Minimum Width: 1" (25.4 mm)

Maximum Volts: 480VAC each half

Maximum Amps: 12.5A each half

Type W1: Abrasion-Resistant Straight Wire Braid Leads, One-Piece Expandable Band

Standard Termination Location: two sets of leads opposite the gap; center of width

Minimum Inside Diameter: 2-1/2" (63.5 mm)

Minimum Width: 1-1/2" (38.1 mm)

Maximum Volts/Amps: 480VAC/12.5A each half

Type W2: Right-Angle Wire Braid Leads, 90 Degrees to Heater Diameter, One-Piece Band

Standard Termination Location: opposite the gap; near edge of width

Minimum Inside Diameter: 1" (25.4 mm)

Minimum Width: 1" (25.4 mm)

Maximum Volts: 480VAC

Maximum Amps: 12.5

Type W2: Right-Angle Wire Braid Leads, 90 Degrees to Heater Diameter, Two-Piece Band

Standard Termination Location: center of each half; near edge of width
Minimum Inside Diameter: 3" (76.2 mm)
Minimum Width: 1" (25.4 mm)
Maximum Volts/Amps: 480VAC/12.5A each half

Type W2: Right-Angle Wire Braid Leads, 90 Degrees to Heater Diameter, One-Piece Expandable Band

Standard Termination Location: two sets of leads opposite the gap; center of width

Minimum Inside Diameter: 3" (76.2 mm)

Minimum Width: 1" (25.4 mm)

Maximum Volts/Amps: 480VAC/12.5A each half

Type W5: Right-Angle Wire Braid Leads, 90 Degrees to Heater Width, One-Piece Band

Standard Termination Location: opposite the gap; center of width
Minimum Inside Diameter: 1" (25.4 mm)
Minimum Width: 1" (25.4 mm)
Maximum Volts: 480VAC
Maximum Amps: 10

Type W5: Right-Angle Wire Braid Leads, 90 Degrees to Heater Width, Two-Piece Band

Standard Termination Location: center of each half; center of width
Minimum Inside Diameter: 3" (76.2 mm)
Minimum Width: 1" (25.4 mm)
Maximum Volts: 480VAC each half
Maximum Amps: 10 each half

Type R1: Abrasion-Resistant Straight Armor Cable, One-Piece Band

Standard Termination Location: opposite the gap; center of width
Minimum Inside Diameter: 1" (25.4 mm)
Minimum Width: 1" (25.4 mm)
Maximum Volts: 480VAC
Maximum Amps: 12.5

Type R1: Abrasion-Resistant Straight Armor Cable, Two-Piece Band

Standard Termination Location: center of each half; center of width
Minimum Inside Diameter: 3" (76.2 mm)
Minimum Width: 1" (25.4 mm)
Maximum Volts/Amps: 480VAC/12.5A each half

Type R1: Abrasion-Resistant Straight Armor Cable, One-Piece Expandable Band

Standard Termination Location: two sets of leads opposite the gap; center of width
Minimum Inside Diameter: 2-1/2" (63.5 mm)
Minimum Width: 1-1/2" (38.1 mm)
Maximum Volts/Amps: 480VAC/12.5A each half

Type R2B: Abrasion-Resistant Right Angle Armor Cable, One-Piece Band

Standard Termination Location: opposite the gap; center of width
Minimum Inside Diameter: 1" (25.4 mm)
Minimum Width: 1" (25.4 mm)
Maximum Volts/Amps: 480VAC/12.5A

Type R2B: Abrasion-Resistant Right Angle Armor Cable, Two-Piece Band

Standard Termination Location: center of each half; center of width
Minimum Inside Diameter: 3" (76.2 mm)
Minimum Width: 1" (25.4 mm)
Maximum Volts/Amps: 480VAC/12.5A each half

Type R2B: Abrasion-Resistant Right Angle Armor Cable, One-Piece Expandable Band

Standard Termination Location: two sets of leads opposite the gap; center of width
Minimum Inside Diameter: 2-1/2" (63.5 mm)
Minimum Width: 1-1/2" (38.1 mm)
Maximum Volts/Amps: 480VAC/12.5A each half

Type R2H: Abrasion-Resistant Right Angle Armor Cable for Type HTL Lead Wire, One-Piece Band

Standard Termination Location: opposite the gap; center of width
Minimum Inside Diameter: 1-1/2" (38.1 mm)
Minimum Width: 1" (25.4 mm)
Maximum Volts/Amps: 480VAC/12.5A

Type R2H: Abrasion-Resistant Right Angle Armor Cable for Type HTL Lead Wire, Two-Piece Band

Standard Termination Location: center of each half; center of width
Minimum Inside Diameter: 3" (76.2 mm)
Minimum Width: 1" (25.4 mm)
Maximum Volts/Amps: 480VAC/12.5A each half

Type R2H: Abrasion-Resistant Right Angle Armor Cable for Type HTL Lead Wire, One-Piece Expandable Band

Standard Termination Location: two sets of leads opposite the gap; center of width
Minimum Inside Diameter: 2-1/2" (63.5 mm)
Minimum Width: 1-1/2" (38.1 mm)
Maximum Volts/Amps: 480VAC/12.5A each half

Type C: General Purpose Terminal Box, One-Piece Band

Standard Termination Location: opposite the gap; center of width
Minimum Inside Diameter: 3" (76.2 mm)
Minimum Width: 2" (50.8 mm)
Maximum Volts/Amps: 480VAC/25A

Type C: General Purpose Terminal Box, Two-Piece Band

Standard Termination Location: center of each half; center of width
Minimum Inside Diameter: 3" (76.2 mm)
Minimum Width: 2" (50.8 mm)
Maximum Volts/Amps: 480VAC/25A each half



Type C: General Purpose Terminal Box, One-Piece Expandable Band

Standard Termination Location: opposite the gap; center of width
Minimum Inside Diameter: 3" (76.2 mm)
Minimum Width: 2" (50.8 mm)
Maximum Volts/Amps: 480VAC/25A each half

Type L1: Plain Wire Leads, One-Piece Band

Standard Termination Location: opposite the gap; center of width
Minimum Inside Diameter: 1" (25.4 mm)
Minimum Width: 1" (25.4 mm)
Maximum Volts/Amps: 480VAC/12.5A

Type L1: Plain Wire Leads, Two-Piece Band

Standard Termination Location: center of each half; center of width
Minimum Inside Diameter: 3" (76.2 mm)
Minimum Width: 1" (25.4 mm)
Maximum Volts/Amps: 480VAC/12.5A each half

Type L1: Plain Wire Leads, One-Piece Expandable Band

Standard Termination Location: two sets of leads opposite the gap; center of width
Minimum Inside Diameter: 2-1/2" (63.5 mm)
Minimum Width: 1-1/2" (38.1 mm)
Maximum Volts/Amps: 480VAC/12.5A each half

Type P1: Quick Disconnect Plugs, One-Piece Band

Standard Termination Location: opposite the gap; center of width
Minimum Inside Diameter: 3" (76.2 mm)
Minimum Width: 2" (50.8 mm)
Maximum Volts: 250VAC     Maximum Amps: 16
Maximum Temperature: 392°F (200°C)

Type P1: Quick Disconnect Plugs, Two-Piece Band

Standard Termination Location: opposite the gap; center of width
Minimum Inside Diameter: 3" (76.2 mm)
Minimum Width: 2" (50.8 mm)
Maximum Volts: 250VAC    Maximum Amps: 16
Maximum Temperature: 392°F (200°C)

Type P2: Terminal Box and High-Temperature Quick Disconnect Straight Plug, One-Piece Band

Standard Termination Location: opposite the gap; center of width
Minimum Inside Diameter: 3" (76.2 mm)
Minimum Width: 2" (50.8 mm)
Maximum Volts: 250VAC    Maximum Amps: 16
Maximum Temperature: 572°F (300°C)

Type P2: Terminal Box and High-Temperature Quick Disconnect Straight Plug, Two-Piece Band

Standard Termination Location: center of each half; center of width
Minimum Inside Diameter: 3" (76.2 mm)
Minimum Width: 2" (50.8 mm)
Maximum Volts: 250VAC each half    Maximum Amps: 16 each half
Maximum Temperature: 572°F (300°C)



Type P2: Terminal Box and High-Temperature Quick Disconnect Straight Plug, One-Piece Expandable Band

Standard Termination Location: opposite the gap; center of width
Minimum Inside Diameter: 3" (76.2 mm)
Minimum Width: 2" (50.8 mm)
Maximum Volts: 250VAC each half    Maximum Amps: 16 each half
Maximum Temperature: 572°F (300°C)

Thermocouple Coupling

The Thermocouple Coupling facilitates the installation of an external thermocouple with a threaded fitting. The standard location for the coupling is 90° from the gap at the center of the width. Specify without through hole for heater sensing or with through hole for load sensing.

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.

See Temperature Sensors for a complete selection of thermocouples available from stock.

Built-In Thermocouple

A built-in thermocouple can be factory installed on Mi-Plus band heaters. ANSI type J or K thermocouples are available on Type L1, R,1 R2, W1, W2 and W5 lead wire terminations. Thermocouple junction is located inside the exit termination stamping, providing a relative heater temperature.

Thermocouple can be located in various positions on the heater. Consult Tempco with your requirements.

Stock Heavy-Duty Quick Disconnect Plugs and Adapters

Heaters with pre-wired plugs allow quick and easy installation of the heater. These plugs can be attached to armor cable or stainless steel wire braid.

For other types of plugs, consult Tempco or specify the manufacturer's part number when ordering. See Accessories for additional Twist-Lock electrical plugs.

Igloo Ceramic Terminal Covers for Screw Terminals



Igloo™ ceramic terminal covers consist of two individual ceramic parts. With a tight-fitting cap and a solid base, an Igloo will fully insulate any standard #8 or #10 terminal lug used for electrical wiring hookups. Igloos can be assembled onto any standard Mi-Plus Band with 8-32 or 10-32 screw terminals.