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Constant Wattage Medium Temperature - CWM

Chromalox CWM constant wattage heating cable is a proven, reliable solution for industrial process temperature maintenance and freeze protection. CWM features a parallel heating core that produces uniform thermal output over its entire length. Using a single power point, you can easily configure and install a heat tracing system as short as several feet or as long as 780 feet right in the field.

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The product

With 392°F (200°C) fluoropolymer electrical insulation over-jacketing, CWM has outstanding electrical and thermal properties, and is well suited for most chemically hostile environments.

WARNINGA ground fault protection device is required by NEC to minimize the danger of fire if the heating cable is damaged or improperly installed. A minimum trip level of 30mA is recommended to minimize nuisance tripping.

  • Uniform Thermal Output, Low Energy Cost
  • No Inrush at Any Ambient
  • Industrial/Process and Commercial/Construction Applications
  • Maximum Exposure Temperature, Power Off, 392°F (200°C)
  • Steam Cleanable on Process Equipment Up to 190 PSIG (Power Off)
  • 4, 8 and 12 W/Ft.
  • 120, 208 – 277 and 480 Volt From Stock
  • Approximate Size .30 in. W x .25 in. H
  • Minimum Bend Radius 1-1/4 in.
  • For Use on Metallic Pipes
  • Consult Factory for Use on Plastic Pipes
  • Approvals (Depends on specific model)
    UL Listed for ordinary areas.
    CSA Certified for ordinary and:
    • Class I, Div. 2, Groups A, B, C, D
    • Class II, Div. 2, Groups F, G. Rated T3 Temperature Class2 (Exception: Cable surface temperature shall not exceed 190°C in Class II, Div. 2, Group F; 165°C in Class II, Div. 2, Group G.).

Features

  • Durable, non-aging fluoropolymer jacket ensures long service life and can be used in some hostile environments.
  • Flexible, easy to install on most equipment and delivers long-term reliable performance.
  • Eliminates the need for oversized wiring or switchgear.
  • Accurate temperature, reliable electric heat that can be consistently controlled and easily monitored.
  • Safe and rugged.
  • Parallel circuitry allows cut-to-length.
  • High performance, rated to withstand up to 392°F saturated steam (190 psig) temperature (power off).
  • Low profile, uses standard size thermal insulation on piping and process equipment.

CWM heat trace cable applications

  • Freeze Protection
  • Freeze Protection, High Exposure Temperature
  • Process Maintenance, Low Temperature
  • Process Maintenance, High Temperature

CWM Heat Trace Cable Features
Max. Maintenance Temp. (°F) 320
Max. Exposure Temp. (°F) Power Off 400
Max. W/Ft. 12
Max. Circuit Length (Ft.) 225 – 900
Buss Wire Size 12
Voltages 120, 208-277, 480
Hazardous Ratings Yes
Usable on Plastic Pipe No
Cut-to-Length in Field Yes
Field Splicable Yes
Can be Overlapped No
Output Varies with Temp. No
Varies Output Along Length No
Accessories DL/EL/U
Monitor Wire Available Contact Factory
CWM Corrosion Selection Guide

Moisture C, CT
Aqueous Solutions of Inorganic Compounds CT
Liquids Organic Chemicals Acids or Bases CT
Acids or Bases CT

C – Tin-Plated copper metallic braid for additional protection and ground path
CT – Fluoropolymer corrosion resistant overjacket over braid for hostile/corrosive environments

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