Conductive

Standard Cartridge Heaters

TUTCO Standard Cartridge Heaters are designed as an economical quality heater for lower temperature use (typically 45 Watts/in²), depending on the application. They are made to temperatures up to 1000ºF (538ºC) and feature a stainless steel sheath for resistance to oxidation. High purity magnesium oxide (MgO) fills any space surrounding the resistance wire in order to optimize heat transfer and increase the life of the heater. Like Hi-Temp Cartridge heaters, many options are available to customize your heater.

Features & Benefits

High watt density rugged construction
Efficient dissipation of heat
Many voltage variations and power options
Wide-range of diameters
Many termination styles – see below
CSA and UL recognized (where applicable)
High quality Nickel-Chromium connections provide consistent junctions and terminations
Use in distributed wattage systems

Cartridge Heater Brochure

Cartridge Heater Fit and Installation

Cartridge Heater Hole Fit

Minimizing Cartridge Heater Failure

SPECIFICATIONS

Max Watt Density: 45 Watts/sq.in.
Max Sheath Temperature: 1000°F (538°C)
Sheath: Stainless Steel
Wattage Tolerance: +5% – 10%, based on NEMA standards
Resistance Tolerance +10% – 5%
8.5% lower at room temperature
Standard Voltages: 120V, 240V & others.
Many others available upon request

Custom Options
Custom Options
Cartridges can be modified to meet the demands of special applications. Our engineers can utilize a variety of alternative features and options to customize the heater to your specific needs. Common customizations include:
- Internal Thermocouples
- Flanges
- Threaded Bushings
- Epoxy Seals
- Leadwire Termination Options
- Mica Tape Leads
- Stainless-Steel Braid or Armor
- Lead Area Sealing
- Distributed Wattage
- No-Heat Sections
- Three Phase Construction
- Dual Voltage
- Zoned Heaters
- Square Cartridge Heaters
Learn more about customizing cartridge heaters in Ian Renwick’s white paper.

Lead Options

	Flexible Leads Internally connected leads. For applications requiring maximum flexibility at lead exit. 10” (25.4 cm) leads standard, other lengths are available.
	Externally Connected Leads Hi-Temp Cartridges are provided with approx. 1” (25.4 mm) sleeving over lead junction as standard. 10” (25.4 cm) leads standard, other lengths are available.
	Straight Leads with Clip Support Clip support helps to minimize lead breakage where leads exit heater. 10” (25.4 cm) leads standard, other lengths are available.
	90° Leads Leads exit at 90° angle for applications where space is limited. 10” (25.4 cm) leads standard, other lengths are available. Order heater by overall length.
	90° Leads with Clip Clip support helps to minimize lead breakage where leads exit heater. 10” (25.4 cm) leads standard, other lengths are available.

Lead Protection

	Straight Strain Relief Spring Straight strain relief spring minimizes bending strain on lead wires. Spring extends approximately 3â€³ (76.2 mm) beyond end of sheath.
	Stainless Steel Braid Stainless steel braid over lead wires. For applications requiring small radius bending and lead wire abrasion protection. 10â€ (25.4 cm) braid standard, other lengths are available.
	Stainless Steel Armor Straight stainless steel armor cable protects leads from abrasion. Sizes include: 1/4â€³, 5/16â€³, 1/2â€³, and 5/8â€³. 10â€³ (25.4 cm) standard, other lengths are available.
	Convoluted Armor Used in situations that require moisture resistant armor. Available in most instances in which armor is utilized. Sizes: 3/8â€³, and 5/8â€³ only. 10â€³ (25.4 cm) standard, other lengths are available.
	Right Angle Elbow Right angle copper elbow for applications requiring right angle lead exit. Moisture-resistant seal is optional. 10â€³ (25.4 cm) leads standard, other lengths are available.

Fittings

	NPT Bushing Hex head N.P.T. bushing attached. Must specify insert length and bushing material. Sheath material types: stainless steel, cold rolled or galvanized. Bushing material types: brass, stainless steel or steel. 10″ (25.4 cm) leads standard, other lengths are available. Octagonal box available.
	Hex Center Bushing Hex head N.P.T. bushing attached. Must specify insert length and bushing material. Sheath material types: stainless steel, steel or brass. Bushing material types: brass, stainless steel or steel. 10″ (25.4 cm) leads standard, other lengths are available. Octagonal or explosion-proof boxes can be adapted to both Standard and Hi-Temp Cartridge heaters.
	Adapter Must specify insert length and bushing material. Sheath material types: stainless steel, cold rolled or galvanized. Bushing material types: brass, stainless steel or steel. 10″ (25.4 cm) leads standard, other lengths are available.
	Adapter with Hex Head Must specify insert length. Bushing material is copper. 10″ (25.4 cm) leads standard, other lengths are available.

Thermocouple

Bottom Grounded
For fast response, heater is positioned in a blind hole or where material flows past or encompasses the heater. The end disk is always welded in place. Machined flat up to 1/2″ (12.7 mm) dia.

Bottom Ungrounded
Where circumstances are such that an ungrounded thermocouple is required.

Center Grounded
Selected when a fast response is required. The thermocouple can be located in any position along the length of the heater. Standard location is midway along the length with approximately 1/4″ (6.4 mm) cold section on either side of the junction. Not available on 1/4” diameter heaters.

Center Ungrounded
The thermocouple is positioned internally and ungrounded to monitor the heater temperature. Generally used in research and development applications.

Removable Thermocouple
The thermocouple is inserted down a hypotube for easy removal.

	Bottom Grounded For fast response, heater is positioned in a blind hole or where material flows past or encompasses the heater. The end disk is always welded in place. Machined flat up to 1/2″ (12.7 mm) dia.
	Bottom Ungrounded Where circumstances are such that an ungrounded thermocouple is required.
	Center Grounded Selected when a fast response is required. The thermocouple can be located in any position along the length of the heater. Standard location is midway along the length with approximately 1/4″ (6.4 mm) cold section on either side of the junction. Not available on 1/4” diameter heaters.
	Center Ungrounded The thermocouple is positioned internally and ungrounded to monitor the heater temperature. Generally used in research and development applications.
	Removable Thermocouple The thermocouple is inserted down a hypotube for easy removal.

Thermocouple Availability

All heaters shown are Hi-Temp with type “J” thermocouple standard. Type “K” thermocouples are available.

For standard Cartridge heaters thermocouples are available located at the bottom or center, ungrounded only.

Other Options

	Armor with Plug Armor cable with power plug attached. Must specify armor length and HubbellÂ® power plug number. Moisture-resistant armor available. Other Plugs are available. Also available with Hex Head NPT bushing and armor.
	Bolt Heater Bolt heaters are designed to heat drilled metal surfaces quickly while minimizing heat loss to surrounding areas. Each is designed to expand drilled bolts or studs while maintaining a uniform heat throughout its heated length. Typically, after a bolt is heated (expanded) the holding nut is tightened. The shrink tightness is obtained when the heater is removed and the bolt cools. This process is frequently used in the assembly and/or servicing of heavy duty equipment such as compressors, steam turbines, pressure vessels, etc.

Diameter Sizes

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