Hi-Density Cartridge Heaters Provide Maximum Processing Temperature Capability.Multi-purpose Cartridge Heaters are the Solution to OEM or Maintenance Applications

Features
  • The standard termination for Hi-Density Cartridge Heaters is Type N, 254 mm (10") long nickel conductor lead wires externally connected to 32 mm (11⁄4") solid conductor terminal pins. The lead wires have fiberglass insulation and are UL approved for temperatures up to 250°C (482°F). Mica insulated UL approved wires for temperatures up to 450°C (842°F) are optional
  • Note: To meet the requirements of your application we offerover 40 standard termination styles to select from that will solve many of the most common application problems. Consult Omega for available options.
  • Ceramic end cap prevents nickel conductors from shorting out against sheath when sharp bending of the leads is required. The ceramic cap may be eliminated in some cases to optimize the heater watt density.
  • Ceramic end cap and swaged-in lava plug protect the internal cartridge from outer contamination. Other types of seals can also be provided.
  • Solid conductor terminal pins are used to ensure a good electrical connection between the nickel conductor lead wires and the resistance wire. They are sized for the maximum current rating of the heater
  • Specially selected grain size high purity Magnesium Oxide (MgO) is used to fill all remaining space inside the sheath. Heater is then swaged, which compacts the magnesium oxide grains into a solid mass, thereby increasing thermal conductivity and dielectric strength.
  • Standard sheath material is 321 Stainless Steel. It provides high temperature strength up to 650°C (1200°F), good thermal conductivity, and resistance to corrosion and scaling. Alloy 321 is a Nickel-Chromium Stainless Steel modified with the addition of Titanium. For higher operating temperatures up to 760°C (1400°F) or corrosive immersion heating applications, Incoloy® 800 is available. Consult PARAMOUNT for other sheath materials.
  • 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 while maintaining dielectric strength. This provides excellent heat transfer and long heater life with the highest possible watt densities. Welded end disc made from the same material as the sheath provides a positive seal against moisture and other contaminants.
  • * Hi-Density Cartridge Heaters are UL recognized and CSA certified in manydesign variations under UL File Number E65652 and CSA File Number043099. If you require UL and/or CSA Agency Approval, please specify when ordering.

Hi-Density Cartridge Heater Specifications


Standard Specifications


Performance Ratings - 321 Stainless Steel Sheath

Maximum Sheath Temperature: 650°C (1200°F) Maximum

Watt Density: 15.5 to 46.5 watt/cm2 (100 to 300 Watt/in2) depending on heater size and operating temperature

Note: The maximum operating temperature and the life expectancy of a cartridge heater is dependent on two main factors:
  • 1. The maximum recommended sheath temperature [650°C (1200°F)] for a standard heater. Special Incoloy® 800 sheath [(760°C (1400°F)]
  • 2. The maximum ambient temperature for the selected termination
  • Length Tolerance for Lead Wires,Wire Braid Leads, and Armor Cable Leads:

    Up to 914 mm (36"): -12.7, 25.4 mm (-1⁄2, 1")

    914 to 1829 mm (36 to 72"): 25.4, 50.8 mm (-1, 2")

    Above 72": 101.6 mm (±4")

    Dimensional Specifications


    Nominal Diameter

    18"

    14"

    516"

    38"

    12"

    58"

    34"

    1"

    Actual Diameter mm (inch)

    3.10 (0.122)

    6.25 (0.246)

    7.82 (0.308)

    9.42 (0.371)

    12.60 (0.496)

    15.77 (0.621)

    18.95 (0.746)

    23.30 (0.996)

    Diameter Tolerance

    0.051 (±0.002)

    0.051 (±0.002)

    0.051 (±0.002)

    0.051 (±0.002)

    0.051 (±0.002)

    0.051 (±0.002)

    0.076 (±0.003)

    0.076 (±0.003)

    Minimum Length

    31.8 (1.25)

    25.40 (1)

    25.40 (1)

    25.40 (1)

    25.40 (1)

    25.40 (1)

    31.75 (11⁄4)

    44.45 (13⁄4)

    Maximum Length

    305 (12)

    914 (36)

    914 (36)

    1219 (48)

    1219 (48)

    1829 (72)

    1829 (72)

    1829 (72)

    Length Tolerance Heaters up to 127 mm (5") long

    2.4 (±3/32)

    2.4 (±3/32)

    2.4 (±3/32)

    2.4 (±3/32)

    2.4 (±3/32)

    2.4 (±3/32)

    3.2 (±1/8)

    3.2 (±1/8)

    Length Tolerance Heaters over 127 mm (5") long

     

    ±2% of sheath length

    Camber Tolerance Heaters to 305 mm (12") long

     

    0.254 mm (0.010") per foot of length

    Camber Tolerance Heaters over 305 mm (12") long

     

    0.508 mm (0.020") per foot of length

    A certain amount of camber is unavoidable. With a slight force, hi-density cartridge heaters will flex enough to fit into a straight reamed hole.

    Electrical Specifications


    Nominal Diameter

    1⁄8"

    1⁄4"

    5⁄16"

    3⁄8"

    1⁄2"

    5⁄8"

    3⁄4"

    1"

    Maximum Voltage

    240

    240

    240

    240

    240

    480*

    480*

    480*

    Maximum Amperage
    (see next line for exceptions)

    3.0

    4.4

    4.5

    6.7

    10.5

    23

    23

    23

    †Maximum Amperage for Types
    C1C, C1D, C2C, C2D, CS, F, M3, R1B,
    S1, S2, SA, W andW3 Terminations

    3.0

    3.0

    5.5

    7.6

    9.7

    9.7

    9.7

    Minimum Wattage at 120V on a 1" long Heater

    50

    45

    45

    50

    50

    Minimum Wattage at 120V on a 2" long Heater

    5

    20

    20

    20

    20

    20

    20

    20

    Maximum Wattage at 120V

    360

    525

    540

    800

    1260

    2760

    2760

    2760

    Maximum Wattage at 240V

    720

    1050

    1080

    1600

    2520

    5520

    5520

    5520

    Maximum Wattage at 480V

    11,000

    11,000

    11,000

    Wattage Tolerance

    +10, -15%

    Plus 5%, minus 10%

    Resistance Tolerance

    +15, -10%

    Plus 10%, minus 5%

    †Current carrying capacities are for ambient temperatures up to 250°C (482°F) with mica insulated lead wires. *480V when applicable. Consult PARAMOUNT.

    Temperature Coefficient of Resistance


    The electrical resistance (ohms) of the heater resistance wire increases with temperature rise. PARAMOUNT standard hi-density cartridge heaters are manufactured with ohms (cold ohms) 3.3% lower than the actual calculated ohms (hot ohms) to compensate for this increase.


    Diameter

    Dual
    Volts

    3-Phase

    Dual
    Circuits

    Mult. Heat Zones
    Max. 3 zones

    1⁄8"

    No

    No

    No

    No

    1⁄4"

    No

    No

    No

    No

    5⁄16"

    No

    No

    No

    No

    3⁄8"

    Yes*

    No

    No

    Yes*

    1⁄2"

    Yes*

    Yes

    Yes

    Yes*

    5⁄8"

    Yes

    Yes

    Yes

    Yes

    3⁄4"

    Yes

    Yes

    Yes

    Yes

    1"

    Yes

    Yes

    Yes

    Yes


    Modifications & Options for Hi-Density Multi-Purpose Cartridge Heaters

    PARAMOUNT stocks over 1000 different semi-finished hi-density cartridge heaters in diameters 6, 8, 10, 13,16, and 19 mm (1⁄4, 5⁄16, 3⁄8, 1⁄2, 5⁄8 and 3⁄4"). These cartridge heaters are semi-finished (substrates), offering you the option to finish them by choosing from 19 program-qualified lead end terminations and options. Cartridge heaters will be ready for shipment within 1 to 3 days, depending on the termination/ option selected.

    Ordering Information — Follow These Simple Steps
    • Select an available 6 mm (1⁄4") through 19 mm (3⁄4") hi-density cartridge heater. The model numbers in the product data tables are for heaters with termination type N [254 mm (10") long externally connected lead wires].
    • Refer to the lead termination reference photos below to select the cartridge heater termination type best suited for your application.
    • NOTE: Type “N” [254 mm (10”) long externally connected plain lead wires] is the most common termination. If a termination other than Type N is selected a new permanent part number will be assigned when your order is placed.
    • Specify your lead requirements in the event that the standard supplied lengths for plain leads 254 mm (10"), braid or armor cable [254 mm (10") over 305 mm (12”) leads] are not suited for your application.
    • Specify the quantity.