Dangerous places are classified into zones based on the frequency of occurrence of an explosive atmosphere and the duration of this environment. These zones may vary depending on whether the hazardous substance is gas or powder.
Zone 0: Places where an explosive atmosphere consisting of a mixture of flammable substances in the form of gas, vapor and mist with air occurs continuously or for a long time or frequently.
Zone 1: Places where an explosive atmosphere consisting of a mixture of flammable substances in the form of gas, vapor and mist with air may occasionally occur under normal operating conditions.
Zone 2: Places where flammable substances in the form of gas, vapor and mist are not likely to mix with air and create an explosive atmosphere under normal operating conditions, or even if such a possibility exists, places where the explosive atmosphere is permanent for a very short time.
Zone 20: Places where flammable dust in cloud form in the air is present continuously or for long periods of time or where explosive atmospheres may occur frequently.
Zone 21: Places where, under normal operating conditions, flammable dust in the form of a cloud in the air may occasionally create an explosive atmosphere.
Zone 22: Zone where, under normal operating conditions, there is no possibility of clouds of flammable dust in the air creating an explosive atmosphere, but even if such a possibility exists, this is only valid for a very short period of time.
GROUP I: It is valid in mines and mining industry.
Kategori M1: Applies to high protection level “0” and “20” environments. The fan does not work in this area.
Kategori M2: When an explosive atmosphere is detected, the device cuts off the power.
GRUP II: It covers all branches of industry except the mining industry.
G: Gas atmosphere;
D: Indicates an atmosphere with dust.
Category 1: It indicates « 0 » and « 20 » environments at high protection level. The fan does not operate in this zone.
Category 2: It covers devices that do not pose a danger during normal operation and in case of any malfunction. Indicates environments numbered “1” and “21”.
Category 3: It does not endanger the environment during normal operation. Indicates environments numbered “2” and “22”.
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