Shenhai leherketa-froga
The designation dIIBT4 refers to a Class II, Category B explosion-proof rating.
| II | B | T4 | Gb | IP64 |
|---|---|---|---|---|
| Mine I | Metanoa | T1 450 ℃ | Ma Extremely high level of protection | IP64 |
| T2 300 ℃ | ||||
| Mb High level protection |
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| T3 200 ℃ | ||||
| I Surface Materials | Propanoa | Ga Extremely high level of protection |
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| T4 135 ℃ | ||||
| Etilenoa | Gb High level protection |
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| T5 100℃ | ||||
| Hidrogenoa, Azetilenoa | 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 tenperatura remains below 130°C.