The designation dIIBT4 refers to a Class II, Category B explosion-proof rating.
II | B | T4 | Gb | IP64 |
---|---|---|---|---|
Mine I | metana | T1 450℃ | Bu Extremely high level of protection | IP64 |
T2 300℃ | ||||
Mb High level protection |
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T3 200℃ | ||||
I Surface Materials | propana | Ga Extremely high level of protection |
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T4 135℃ | ||||
Etilen | Gb High level protection |
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T5 100℃ | ||||
Hidrogen, Asetilen | Gc General level protection |
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T6 85℃ |
The prefix ‘d’ denotes a flameproof type of enclosure, designed so that any internal explosion is contained without damaging the enclosure and preventing the spread of explosion outside;
IIB specifies the category of gas utilized;
T4 signifies that the product’s maximum surface suhu remains below 130°C.