Explosion Proof Wall Exhaust Fans

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Explosion Proof Wall Exhaust Fans

The exhaust fans on this page are sturdily constructed, direct drive, horizontal discharge fans that are typically use for general ventilation of factories, garages, warehouses and other industrial, commercial & agricultural building applications.

All of the hazardous location or intrinsically safe exhaust fan have a single speed explosion proof motor.

Totally enclosed, ball bearing motor with thermal overload protection.
The fan blades are well-balanced, heavy gauge aluminum.
Heavy wire chrome plated OSHA guards on intake side of fan.
All fans are shipped completely assembled.

CLASS I, GROUP C Atmospheres containing ethyl ether, ethylene, gases or vapors of equivalent hazard.
CLASS I, GROUP D Atmospheres such as acetone, ammonia, benzene, butane, cyclopropane, ethanol, gasoline, hexane, methane, natural gas, naphtha, propane, or gasses or vapors of equivalent hazard.
CLASS II GROUP F Atmospheres containing carbonaceous dust, including carbon black, charcoal, coal, or coke dusts that have more than 8% total entrapped volatiles, or dusts that have been sensitized by other materials so that they present an explosion hazard.
CLASS II GROUP G Atmospheres containing combustible dusts not included in group E or F, including flour, grain, wood, plastic and chemicals. 

** Please see individual manufacturer's motor specs to confirm which class is covered.

While no explosion proof wall exhaust fan is considered to be 100% explosion proof, the combination of explosion proof motors and non sparking aluminum propellers help minimize the likely hood of a fire or explosion caused by the fan.

AMCA code 99-0401 addresses spark resistance in terms of assembly of fan components. There are generally three types of spark resistant construction:
TYPE A:   
This is the highest degree of spark resistance - the air stream parts of the fan are made out of non-ferrous material (materials whose whose iron contact is less than 5%). Aluminum is typically the non-ferrous materials used but other materials such as Monel®, Inconel® and Hastelloy® are used in high heat applications where aluminum is not suitable.
TYPE B:
Less protection than Type A spark resistant construction,  AMCA “B” construction consists of a non-ferrous wheel and non -ferrous rubbing plate around the hole through which the shaft passes. As with AMCA “A” construction, aluminum in usually the non-ferrous material of choice but can be substituted with the alternative materials listed for AMCA “A” construction.
TYPE C:
This is the lowest degree of spark resistance. Utilizes only a non-ferrous rubbing plate that is typically constructed of aluminum but can be constructed out of the aforementioned alternative materials when appropriate.   

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