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Subject : airs, re-bu
Hazardous location air exhaust ventilation fan (sometimes called explosion proof) may be required in any area where the presence of flammable gases Wholesale Manchester United Jersey , vapors or finely pulverized dust in the atmosphere is sufficient to create a threat of an explosion or fire. It may also be required where easily ignitable fibers or flying's are present. The following information is a representative, but is not an all-inclusive, list of the types of locations and operations that require hazardous location air exhaust ventilation equipment in at least certain areas. Consult the current National Electric Code® for complete and current information.

Typical Class I Locations Include:

• Petroleum refining facilities
• Dip tanks containing flammable or combustible liquids
• Dry cleaning plants
• Organic coating manufacturing plants
• Paint spray booths
• Spray finishing areas (residue must be considered)
• Petroleum dispensing areas
• Solvent extraction plants
• Plants manufacturing or using pyroxylin
• (nitro-cellulose) type and other plastics
• (Class II also)
• Locations where inhalation anesthetics are used
• Utility gas plants and operations involving storage and handling and liquefied petroleum and natural gas
• Aircraft hangars and fuel servicing areas

Typical Class II Locations Include:

• Grain elevators and bulk handling facilities
• Magnesium and aluminum powder manufacture and storage facilities
• Starch manufacture and storage facilities
• Fireworks manufacture and storage facilities
• Flour and feed mills
• Pulverized sugar and cocoa packaging and handling areas
• Coal preparation and handling facilities
• Spice grinding plants
• Confectionery manufacturing plants

Typical Class III Locations Include:

• Woodworking plants
• Textile mills
• Cotton gins and cotton seed mills
• Flax producing plants

Some chemicals may have characteristics that require safeguards beyond those required for any of the certified atmospheric groups. Carbon disulfide is an example of such a chemical because of its low ignition temperature and the small joint clearance to arrest its flame propagation.

Certain metal dust may have characteristics that require safeguards beyond those required for atmospheres containing the dust of aluminum Wholesale Manchester City Jersey , magnesium and their commercial alloys. For example, zirconium, thorium and uranium dust have extremely low ignition temperatures and minimal ignition energies lower than any material classified in any of the Class I or Class II groups.

The Hazardous Location fans incorporate spark proof construction in its design to minimize the potential for a random spark being the ignition source of an explosion in a hazardous location. All major components are fabricated from materials that will not produce a spark when struck by a direct impact blow i.e. aluminum propeller or blade and explosion proof motors.

As an illustrative example Wholesale Liverpool Jersey , consider the potential consequence if a tool is dropped and strikes the blade or propeller of an exhaust ventilation fan in use. With in a non-hazardous atmosphere, the risk for an explosion is minimal. However, if the same tool strikes the exposed Wholesale Leicester City Jersey , steel surfaces of a fan operating in a hazardous location containing gasoline fumes, the results could be drastically different. The blow produced by the tool could create a random spark. In the case of gasoline fumes, the addition of a proper air and gasoline fume mixture could result in an explosion. Minimizing this potential for a spark ignition is also an important reason to use spark proof tools and related equipment in hazardous locations. By incorporating basic spark proof blade motor construction Wholesale Juventus Jersey , the potential for a spark-ignited explosion caused by a direct blow is greatly minimized. The use of an explosion proof motor alone, or an aluminum blade propeller, does not qualify the fan as "explosive proof". IMPORTANT! No air exhaust ventilation fan is totally explosion proof. Only a product utilizing proper design and certification standards can minimize the risk of an explosion in an applicable hazardous atmosphere.

Tough applications mean tough fans and blowers by Industrial Pressure Blower Co. which is a world wide distributor of industrial process ans OEM fans and blowers Wholesale Inter Milan Jersey , as well as fan blower components; including high pressure blowers, high temperature fans, spark resistant and explosion proof ventilators Wholesale Borussia Dortmund Jersey , tubeaxial and vaneaxial high pressure ventilators. Canada Blower also does existing fans and blowers repairs, re-build, as well as dynamical wheels balancing.

Additional information can be found at the Industrial Pressure Blower Co. web site http:www.barryfan.netindustrial-blower-fan

Oleg Tchechel
Industrial Equipment Engineer
Industrial Pressure Blower Co.
nis@primus.ca
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Posted on October, 12 2018 06:39:21 AM

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