Shenhai Explosion-Proof
For Zone 1 applications, explosion-proof types such as “d” flameproof, “ib” intrinsically safe, encapsulating Ma and Mb, pressurized Px and Py, oil-immersed ‘o’, sand-filled ‘q’, and increased safety ‘e’ are applicable. These types can also be operational in Zone 2. However, type “n” products are exclusively for use in Zone 2.
| Equipment protection level | Ga | Gb | Gc |
|---|---|---|---|
| The protection levels for equipment are prescribed based on the varying characteristics of explosive gas environments, explosive dust environments, and coal mine methane explosive environments, as well as the possibility of the equipment becoming an ignition source. | In explosive gas environments, equipment is designated with a "high" level of protection, ensuring that it does not serve as an ignition source during regular operation, anticipated malfunctions, or rare failures. | In explosive gas environments, equipment is assigned a "high" level of protection, ensuring that it does not serve as an ignition source during normal operation or anticipated fault conditic ions. | In explosive gas environments, equipment is typically assigned a "general" ievel of protection, preventing it from serving as an ignition source during regular operation. Furthermore, supplementary protective easures can be implemented to minimize the formation of effective ignition sources, particularly in cases of anticipated and frequent occurrences (e.g. failures in lighting fixtures). |
| Zone | Zone 0 | Zone 1 | Zone 1 |
Regarding hazardous gases, classifications IIA, IIB, and IIC denote different gas types: IIA corresponds to propane, IIB to ethylene, and IIC to hydrogen. Models like Exd IIA, Exd IIB, and Exd IIC are suitable for gas hazardous Zones 1 and 2. Conversely, an Ex nL IIC product is restricted to usage in Zone 2 only.