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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.

WARNING — A 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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100%

Energy self-sustainable

+4500

Customers around the world

ISO 9001

Certified since 2006

+5000

Parts delivered monthly

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