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Hi-Density

Cartridge Heaters

Hi-Density Cartridge Heaters Provide Maximum

Processing Temperature Capability.

Multi-purpose Cartridge Heaters are the Solution to

OEM or Maintenance Applications

HDC Series

Features

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

High temperature fiberglass sleeve provides maximum

electrical insulation to the crimp connector used to

splice the nickel conductors to the flexible leads.

Ceramic end cap prevents nickel conductors from

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.

Incoloy

®

800 is available. Consult Omega 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

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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/cm

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:

and Armor Cable Leads:

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

⁄2, 1")

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

Above 72": 101.6 mm (±4")

Nominal Diameter

1

⁄8"

1

⁄4"

5

⁄16"

3

⁄4" 1"

Actual Diameter mm (inch)

3.10

(0.122)

6.25

(0.246)

7.82

(0.308)

9.42

(0.371)

12.60

(0.996)

Maximum Length

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)

(±3/32)

(±3/32)

(±3/32)

Length Tolerance Heaters

over 127 mm (5") long

Dimensional Specifications

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

⁄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)

— 50 45 45 50 50 — —

Minimum Wattage at 120V on a 2" long Heater

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

Temperature Coefficient of Resistance

The electrical resistance (ohms) of the heater

resistance wire increases with temperature rise.

Omega 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.