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Class I, Division 2

Daisy Data Displays, Inc. (D3) specializes in ruggedized computers and a variety of accessories to accompany them, such as industrial monitors, purge controls and more. Our customers often need equipment that will meet the requirements of different hazardous area standards. D3 offers products that adhere to different environmental classifications, including Class I, Division 2 standards.

 

A hazardous area designated as Class I is one which is created by the presence of flammable gasses or vapors in the air, such as natural gas or gasoline vapor. When these materials exist in an environment, there is potential for explosion which could ignite if an electrical or other source of ignition is present, such as gasoline storage and dispensing areas. Classes are further defined by groups.

 

CLASS I (gases and vapors)
Group A (acetylene)
Group B (hydrogen)
Group C (ethylene)
Group D (propane)
CLASS II (dusts)
Group E (metal dust)
Group F (coal dust)
Group G (grain dust)
CLASS III (fibers)
No Subgroups

 

A Division 2 rating refers to a location in which ignitable concentrations of the combustible material(s) are present in the air only under abnormal operating conditions, such as a case during accidental rupture or breakage, or during unusual or faulty operations.

 

USA: NEC 500
Division 1
Explosive material Class Group
Gas/vapor or liquid I A, B, C, D
Dust II E, F, G
Fibers III
Division 2
Explosive material Class Group
Gas/vapor or liquid I A, B, C, D
Dust II F, G
Fibers III

 

Class I, Division 2 areas can be protected by using approved equipment offered by Daisy Data Displays, Inc. Division 2 environments do not need to take as extreme precautions as Division 1 environments. Equipment should be nonincendive, non-sparking, and/or Z-purged. Nonincendive equipment has electrical circuitry that is incapable, under normal operating conditions, of causing ignition of a specified flammable gas-air, vapor-air, or dust-air mixture due to arcing or thermal means.

 

A purged system means supplying an enclosure with a protective gas at a sufficient flow and positive pressure to reduce the concentration of any flammable gas or vapor initially present to an acceptable level. Purging requires a monitoring unit that reliably switches off the electrical operating equipment inside the housing as soon as sufficient pressurization is no long present. The monitoring unit must be designed in a different protection method, so that it can also be operated without pressurization.

 

From PCs and monitors to keyboards and other accessories, D3 offers a wide array of products to ensure safety even in the most hazardous areas.

 

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