Heat trace cable available for Class I, Division 1 hazardous environments

Chromalox (Pittsburgh), a division of Emerson Electric Co., has introduced a line of Factory Mutual approved heat trace cables for Class I, Division 1, Group B, C, and D (hazardous gas and vapor) environments. These cables also meet Factory Mutual requirements for use in Class II, Division 1, Groups F, G (combustible dust), and Class III environments.

Chromalox type HSRL (low temperature) and HSRM (medium temperature) cables provide safe, reliable heat tracing for process temperature maintenance, viscosity/fluid flow management, and freeze protection of pipes, valves and tanks. To complete the system, Chromalox offers free ChromaTRACE 2.0 design software and the IntelliTRACE system, a complete heat trace control solution consisting of a pre-wired and assembled control panel with a microprocessor, control elements, RS-485 communications interface and Ground Fault Indicator. Chromalox heat trace cable terminations, splices, tees and end seal kits reduce installation time and NEMA Type 7 enclosures provide system protection.

The HSRL and HSRM cables are self-regulating and come with T-ratings of T2C, T3, T4A, T5, and T6, corresponding to maximum sheath temperatures in the range of 446µF to 185µF. (The T-rating of a Class I/Div.1 heat trace cable must correspond to a sheath temperature equal to or less than 80% of the lowest auto-ignition temperature of the hazardous fumes in the cable installation area.) These cables are available in a wide range of wattage and voltage ratings, from 3 W/Ft at 120 VAC up to 20 W/Ft at 277 VAC. Circuit lengths up to 780 feet are possible.

Chromalox heat trace cables use a special semiconductive polymer core matrix bonded to the conductors, which provides self-regulation and makes an over-temperature condition all but impossible. Because the core's electrical resistance varies inversely with temperature, the cables are power efficient, consuming less energy when lower heat is required. A flame retardant fluoropolymer inner jacket insulates the core and heat trace wires from a tinned copper braid that provides mechanical support and a positive ground path. The outer fluoropolymer jacket is flame retardant, resists most chemically active corrosives, and protects against abrasion and impact damage. The cables can be cut to length in the field, and single overlapped without fear of burnout.

For more information: Mark Crombie, Chromalox, 701 Alpha Dr., Pittsburgh, PA 15238. Tel: 615-793-3900.

Edited by Angelo DePalma
Managing Editor, Pharmaceutical Online and www.drugdiscoveryonline.com
Email: adepalma@vertical.net

Visit the Chromalox storefront on Pharmaceutical Online.