Hazardous Fans

Explosion Proof " THE ULTIMATE

Model WC-1HP-DHL
ETL APPROVED HAZARDOUS LOCATIONS FANS	CAPABLE OF LOWERING TEMPERATURES IN EXCESS OF 20 DEGREES
	PORTABLE / COMPACT / LIGHTWEIGHT
	115v / LOW COST OPERATION
	POWERFUL 1 HP BLOWER
	WHISPER QUIET OPERATION
	LARGE 24 GALLON RESERVOIR
	GREAT DUCTING CAPABILITIES
	ENVIRONMENTALLY FRIENDLY

Hazardous Location Fans / Explosion Proof Fans

Class I Locations for hazardous location fans

According to the NEC, there are three types of hazardous locations. The first type of hazard is one which is created by the presence of flammable gases or vapors in the air, such as natural gas or gasoline vapor. When these materials are found in the atmosphere, a potential for explosion exists, which could be ignited if an electrical or other source of ignition is present. The Code writers have referred to this first type of hazard as Class I. So, Class I Hazardous Location Fans are one in which flammable gases or vapors may be present in the air in sufficient quantities to be explosive or ignitable. Some typical Class I hazardous location fans are used in:

Petroleum refineries, and gasoline storage and dispensing areas;

Dry cleaning plants where vapors from cleaning fluids can be present;

Spray finishing areas;

Aircraft hangars and fuel servicing areas; and

Utility gas plants, and operations involving storage and handling of liquefied petroleum gas or natural gas.

All of these are Class I . . . gas or vapor . . . hazardous locations. All require special Class I hazardous location equipment.

Class II Locations for hazardous location fans

The second type of hazard listed by the National Electrical Code are those areas made hazardous by the presence of combustible dust. These are referred to in the Code as "Class II Locations." Finely pulverized material, suspended in the atmosphere, can cause as powerful an explosion as one occurring at a petroleum refinery. Some typical Class II hazardous location fans are used in:

Grain elevators;

Flour and feed mills;

Plants that manufacture, use or store magnesium or aluminum powders;

Producers of plastics, medicines and fireworks;

Producers of starch or candies;

Spice-grinding plants, sugar plants and cocoa plants; and

Coal preparation plants and other carbon handling or processing areas.

Class III Locations for hazardous location fans

Class III hazardous location fans are used in areas where there are easily-ignitable fibers or flyings present, due to the types of materials being handled, stored, or processed. The fibers and flyings are not likely to be suspended in the air, but can collect around machinery or on lighting fixtures and where heat, a spark or hot metal can ignite them. Some typical Class III hazardous location fans are used in:

Textile mills, cotton gins;
Cotton seed mills, flax processing plants; and
Plants that shape, pulverize or cut wood and create sawdust or flyings.