Standard sheath material is 321 Stainless Steel which provides good thermal conductivity, and resistance to corrosion and scaling. Welded end disc made from the same material as the sheath provides a positive seal against moisture and other contaminants. Grade “A” Nickel-Chrome resistance wire precisely wound on a high purity magnesium oxide core places the resistance wire as close to the inside of the sheath as possible. A high purity Magnesium Oxide (MgO) powder is used to fill all remaining space inside the sheath. Heater is then swaged, which compacts the magnesium oxide grains into a solid mass. The standard termination for is Type N, 10" (254 mm) long nickel conductor lead wires externally connected to solid conductor terminal pins.
Standard sheath material is 321 Stainless Steel which provides good thermal conductivity, and resistance to corrosion and scaling. Welded end disc made from the same material as the sheath provides a positive seal against moisture and other contaminants. Grade “A” Nickel-Chrome resistance wire precisely wound on a high purity magnesium oxide core places the resistance wire as close to the inside of the sheath as possible. A high purity Magnesium Oxide (MgO) powder is used to fill all remaining space inside the sheath. Heater is then swaged, which compacts the magnesium oxide grains into a solid mass. The standard termination for is Type N, 10" (254 mm) long nickel conductor lead wires externally connected to solid conductor terminal pins.
EXPLORE HI-DENSITY CARTRIDGE HEATERS SPECIFICATIONS
A select amount of heater specifications are available in our expedited shipping Terminator Program. Choose your desired shipping window and browse available selections below.
The Electrical Termination is located at one end of the heater and exits straight out from the heater.
Strain relief clip for leads subject to tension and stress. A “T” type strain relief is silver brazed to the sheath and bent at a 90° angle.
General purpose Stainless Steel NEMA 1 electrical enclosure designed to provide protection from electrical shock. The boxes have a 5/8" conduit knockout and are welded or brazed to the cartridge sheath.
NEMA 4 aluminum electrical enclosures provide protection from splashing or hose directed water, external condensation and water seepage. The box is mechanically attached to the cartridge sheath.
General purpose Stainless Steel NEMA 1 electrical enclosure designed to provide protection from electrical shock. The box is welded or brazed to the cartridge sheath.
General purpose steel NEMA 1 electrical enclosure designed to provide protection from electrical shock. The box is welded to the cartridge sheath.
NEMA 4/7 electrical enclosures provide protection from contaminants, moisture, and hazardous conditions. These housings are screwed onto a heater with a single or double ended Brass or Stainless Steel fitting.
A threaded fitting mounting termination must be specified. See pages 2-50 and 2-51.
Other terminal box configurations available upon request.
Various types of crimp terminals can be attached to the heater leads to make wiring into applications quick and easy. Non-insulated and insulated with nylon (221°F/105°C) or PVC (194°F/90°C).
Various types of crimp terminals can be attached to the heater leads to make wiring into applications quick and easy. Non-insulated and insulated with nylon (221°F/105°C) or PVC (194°F/90°C).
Various types of crimp terminals can be attached to the heater leads to make wiring into applications quick and easy. Non-insulated and insulated with nylon (221°F/105°C) or PVC (194°F/90°C).
Various types of crimp terminals can be attached to the heater leads to make wiring into applications quick and easy. Non-insulated and insulated with nylon (221°F/105°C) or PVC (194°F/90°C).
Allows for the quick and easy replacement of the heater. The plug can be attached to galvanized armor cable, stainless steel armor cable, or wire braid.
When required, high temperature lead wire can be used on most cartridge heaters. The stranded wire is insulated with mica tapes and then a treated fiberglass overbraid.
Maximum temperature rating: 450°C (842°F)
Maximum temperature rating: 200°C (392°F)
Either the galvanized or stainless steel armor cable can be covered with moisture proof heat shrink Polyolefin tubing.
When required, high temperature lead wire can be used on most cartridge heaters. The stranded wire is insulated with mica composite and then a treated fiberglass overbraid.
Available wire gauge sizes: 10-18
Maximum temperature rating: 550°C (1022°F)
For effective thermal and mechanical protection, the lead wires can be covered with uncoated fiberglass sleeving.
FSA: Uncoated Fiberglass sleeving on each lead separately
FSB: Uncoated Fiberglass sleeving on both leads together
Specify length when ordering.
Maximum temperature rating: 1112°F (600°C)
For added protection, strength, and resistance to various chemicals, the lead wires can be covered with silicone rubber sleeving.
SRA: Silicone rubber coated fiberglass sleeving on each lead separately
SRB: Silicone rubber coated fiberglass sleeving on both leads together
Specify length when ordering.
Maximum temperature rating: 200°C (392°F)
A single threaded pipe fitting is attached to the end of a cartridge heater to allow for installation into a threaded hole. This mounting option, available with many terminations, can also be offset from the lead end of the sheath. This option is useful when the lead wires need to be kept away from the heated area. Brass fittings are silver brazed and stainless steel fittings are heli-arc welded. Available with the potting seals listed in the table.
A double threaded pipe fitting is attached to the end of a cartridge heater to allow for installation into a threaded hole. Brass fittings are silver brazed and stainless steel fittings are heli-arc welded.
This heater has a header cap as an integral part of the fitting. Leads exit through small holes which are sealed with epoxy for moisture protection.
A 5/8-18 UNF fitting is attached to the end of the cartridge heater to allow for mounting the heater to the wall of a tank or enclosure. Brass fittings are silver brazed and stainless steel fittings are heli-arc welded. Includes a copper washer and jam nut. The lead wires are internally connected. Available with the potting seals listed in the table.
Recommended for applications where excessive vibration exists and may cause the heater to back out of its mounting hole. The 16 ga. 304 SS flange is used as a means of securing the cartridge heater in place. The default position of the flange is flush with the lead end. Specify the position of the flange when ordering.
A hex shape allows the possibility of using a wrench when removal is tight. The 16 ga. 304 SS flange is used as a means of securing the cartridge heater in place. The default position of the flange is flush with the lead end. Specify the position of the flange when ordering.
The sheath extension is welded to the cartridge at a 90° angle. The standard sheath extension is 3/8" long. Specify when ordering if a longer sheath extension is required. If abrasion resistance is required, armor cable or stainless steel wire braid can be attached to the sheath extension. Available with various lead wire types and potted end seals.
The heater sheath itself is bent to 90°. The bend is through a required unheated section. The standard sheath extension past the bend is 1". Specify when ordering if a longer sheath is required.
The standard sheath material for all Hi-Density Cartridge Heaters except 1" diameter is 321 stainless steel; standard for 1" diameter is 304 stainless steel. The incoloy sheath option is available on all diameters except 1/8", 5/16", 8 mm and 20 mm.
To assist you in selecting the proper sheath material, corrosion resistant ratings and chemical properties of various heater sheath materials are given in the Engineering Section of the site.
If your application requires a specific alloy sheath material, consult Tempco with your requirements.
Passivating is a chemical process accomplished by dipping the heater in a solution of nitric acid. The process removes surface contamination, usually iron, so that the optimum corrosion resistance of the stainless steel is maintained.
If a special length tolerance different than the standard length tolerance specified on page 2-4 is required, consult Tempco with your requirements.
Electro-Polishing is an electro-chemical process that removes surface imperfections and contaminants, enhancing the corrosion resisting ability of the heater sheath.
For applications requiring high precision fit and tolerance, the sheath can be centerless ground. Tolerance: ±0.0005 inches (0.013 mm) Specify diameter when ordering.
