IIB

Explosion-proof classifications are divided into IIA, IIB, and IIC, with IIC being the highest level, followed by IIB and IIA.

The designation dIIBT4 refers to a Class II, Category B explosion-proof rating. The prefix 'd' denotes a flameproof type of enclosure, designed so that...

AH-G1/2" series AH-G3/4" series AH-G1" series AH-G1 1/4" series AH-G1 1/2" series AH-G2" series

Explosion-proof equipment within Class II is categorized into: Class IIA, Class IIB, and Class IIC. The ratings follow a hierarchy: IIC > IIB > IIA.

Ex: Signifies equipment designed for explosion-proof applications; d: Specifies that the equipment is of the flameproof explosion-proof type...

Explosion-proof products each have an explosion-proof rating, which distinguishes the product's type of explosion-proof design and applicable scenarios.