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Heaters, Sensors, Controllers, Relays, Linear Displacement, and Leadwire

Cartridge Heater Manufacturer

Standard Lead Times

Information

MPI Morheat has an extensive Stock List of Cartridge heaters available for same day shipment. MPI Morheat also manufactures custom cartridge heaters and can expedite production if needed.

Cartridge heaters are most frequently used for heating metal parts through insertion into drilled holes. For easy installation, the heaters are made slightly undersized relative to their nominal diameter. The majority of applications do not require maximum watt/in². Using as little wattage as possible to meet process requirements will ensure maximum heater life.

Holes should be drilled and reamed, rather than drilled to the final diameter with a general purpose drill. At high watt densities, a close fit is important. The fit is the difference between the minimum diameter of the heater and maximum diameter of the hole.

Diameters

We can also manufacture heaters to exact diameters – ex. 0.496″ Diameter Heaters

Diameter Sizes Available and Tolerances
Sizes – RoundSizes – Square
Nom DiaMin DiaMax DiaMax AmpsMax VoltsNom SizeMin SizeMax SizeMax AmpsMax Volts
1/8″0.1190.1243.6240 3/8″x3/8″0.3690.3749300
1/4″0.2440.249930 1/2″x1/2″0.4940.4999300
6.5mm0.250.2559300 5/8″x5/8″0.6190.62415300
8mm0.3090.3149300Sizes – Rectangle
3/8″0.3690.3749480Nom SizeMax WidthMax DepthMin WattsMax W/in
10mm0.3880.39315480 1/8″x1/4″0.1240.2491030
7/16″0.4320.43715600 1/8″x3/8″0.1240.3741050
12mm0.4660.47115600 1/4″x5/8″0.2490.6241070
12.5mm0.4860.49115600 1/4″x1″0.2490.99910100
1/2″0.4940.49915600 
13mm0.5060.51115600
17/32″0.5250.5315600
14mm0.5450.5526600
5/8″0.6190.62426600
16mm0.6240.62926600
17mm0.6630.66826600
11/16″0.6820.68726600
19mm0.7420.74726600
3/4″0.7440.74926600
20mm0.7820.78626600
25mm0.9780.98326600
1″0.9940.99926600
  • Length tolerance is +/- 3% or +/- 3/32, whichever is greater.
    (*excludes disc and lead end varied formation lengths)
  • Camber tolerance is .025″ per foot of length. Slight camber is normally not a problem since the heater will flex enough to enter a clean hole.
  • Wattage tolerance is +5%, -10%
Construction

1. Welded Disc
2. Stainless steel tube in 304/316/321/INCOLOY
3. Ceramic disc insulator
4. Pure magnesium oxide
5. Nickel-chrome 80/20 heater wire
6. Ceramic core
7. Hard ceramic head
8. Lead Wire
9. Optional Potting Compound

LEAD WIRE OPTIONS
PictureTypeMax TempNotes
MGT 1000°C1832°F / 1000°CFlexible, Not Waterproof
MGT 750°C1382°F / 750°CFlexible, Not Waterproof
Duraflex1022°F / 550°CFlexible, Not Waterproof
MGT842°F / 450°CFlexible, Not Waterproof
TGGT482°F / 250°CDurable, Flexible, Not Waterproof
Teflon500°F / 260°CAbrasion Resistant, Small OD, Waterproof
Silicone Rubber355°F / 180°CVery Flexible, Waterproof, Easy to Nick
SEW2392°F / 200°CVery Flexible, Fair Abrasion Resist, Waterproof
END SEAL OPTIONS
End Seal Options
TypeMax TempMoisture ProtectionContaminant ProtectionMech. StrengthVibration Resist.
Ceramic2500°F 1371°CPoorPoorExcellentExcellent
Teflon300°F 149°CExcellentExcellentVery GoodExcellent
Lava3000°F 1649°CPoorGoodGoodPoor
Cement Potting1800°F 982°CPoorFairGoodPoor
Epoxylite Potting650°F 343°CFairVery GoodVery GoodExcellent
Epoxy Potting265°F 129°CGoodGoodExcellentExcellent
Silicone Rubber500°F 260°CExcellentExcellentFairExcellent
Terminations
Common Termination StylesPicture
High Temperature Swaged in Leads
High Temperature Leads w/ 90° Exit.
High Temperature Crimped on S/S Braid.
High Temperature Swaged in S/S Braid.
High Temperature Leads w/ 90° Exit & S/S Braid.
High Temperature Leads w/ 90° Exit & S/S Armor.
High Temperature Leads w/ S/S Armor
Post Terminals
special construction
Add Ons Features
PictureTypeNotes
Stainless Steel
Fittings
Single or Double-ended :
1/8″, 1/4″, 3/8″NPT
1/2″, 3/4″, 1″NPT
Brass
Fittings
Single or Double-ended :
1/8″, 1/4″, 3/8″NPT
1/2″, 3/4″, 1″NPT
FlangesStandard Stainless Steel.
Flanges can be round
or irregularly shaped.
Strain
Relief
Provides extra support for leads.
Great for Flexing applications
Special Constructions
PictureType Notes
Bent HeaterMust be bent in an unheated section
MultiZone or
Distributed Watts
Multi Zone – Up to 3 zones
Distributed Wattage – custom
Double EndedElectrical Termination on Both Sides
– either Lead Wires, Post terminals
Internal
T/C
(J/K)Type A – Center Core
– Heater Temperature
Type B – Middle
– Block Temperature
Type C – End
– Disk End Temperature
Flat Bottom