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Explosion Proof Duct Heaters

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Designed for use in hazardous areas with explosion-resistant cast aluminum terminal enclosure and redundant over temperature protection. Sized to fit the duct. Heavy wall, large diameter finned tubular elements, individually removable for servicing. Tubular and finned designs can provide outlet air temperatures up to 650C (1200F) for industrial heating applications. Applications include petrochemical plants, aircraft hangars, fueling areas, oil drilling rigs, sewage treatment plants, pipeline pumping stations, paint spray booths, storage areas for flammable products, labs or testing areas.

Wattco explosion proof duct heaters is the solution to the problem of heating equipment and products where Class 1, Groups B, C, D hazardous gases or vapors exist. This heater provides a clean safe source of heat for hazardous areas found in extraordinary environments.

Below is a table of Class 1, Group C & D Hazardous Atmospheres:

Group Chemical Ignition Temperature
Degrees C Degrees F
C Acetaldehyde
Allyl alcohol
Carbon monoxide
Crotonaldehyde
Dimethylamine
Ethylene
Hydrogen cyanide
Hydrogen sulfide
N-butyraldehyde		 175
378
609
232
400
450
538
260
232		 347
713
1128
450
752
842
1000
500
450
D Acetone
Ammonia
Benzene
Butane
Butyl acetate
Ethane
Ethanol (ethyl alcohol)
Gasoline (56-60) octane
Gasoline (100 octane)
Heptanes
Hexanes
Methane (natural gas)
Methanol
Methyl ethyl ketone
Naphtha (petroleum)
Octanes
Pentanes
Propane
Propylene
Styrene
Toluene
Vinyl acetate
Vinyl chloride
xylenes		 465
498
498
288
421
472
363
280
456
204
225
537
385
404
288
206
243
450
455
490
480
402
472
464		 869
928
928
550
790
882
685
536
853
399
437
999
725
759
550
403
470
842
851
914
896
756
882
867

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NOTE: All information in CONDEX WATTCO INC ("WATTCO") catalog was considered accurate and correct at printing time. WATTCO is committed to product research and development. WATTCO therefore has the right to make changes to specifications, designs and the Sales Terms and Conditions without prior notice. Should a conflict arise, WATTCO Sales Terms and Conditions will prevail. WATTCO is not responsible for any typographical errors.

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