Application
1.Can be used in Zone 1and 2 dangerous places.
2.Can be used in IIA、IIB、IICgroup explosive atmosphere.

Model Implication

For example
1.Made of good carbon-steel.
2.Ex-mark:Exd II
3.The thread specification can be provided particularily by user.
4.Suitable for GB3836-2000,IEC60079 standard request.