Products

High Density Cartridge Heater

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″)

High Density Cartridge Heater

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 Vinayak 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.

 

Dimensional Specifications

Nominal Diameter 1⁄8“ 1⁄4“ 5⁄16“ 3⁄8“ 1⁄2“ 5⁄8“ 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 (0.496) 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 Vinayak