The Difference Between Explosion-Proof Level CT6 and BT6

IIBT6

Gasgruppe/temperaturgruppe	T1	T2	T3	T4	T5	T6
IIA	Formaldehyd, toluen, methylester, acetylen, propan, acetone, akrylsyre, benzen, styren, kulilte, ethylacetat, eddikesyre, klorbenzen, methylacetat, klor.	Methanol, ethanol, ethylbenzen, propanol, propylen, butanol, butylacetat, amylacetat, cyclopentan	Pentan, pentanol, hexan, ethanol, heptan, oktan, cyclohexanol, terpentin, nafta, petroleum (herunder benzin), fuelolie, pentanoltetrachlorid	Acetaldehyd, trimethylamin		Ethylnitrit
IIB	Propylenester, dimethylether	Butadien, epoxypropan, ethylen	Dimethylether, acrolein, hydrogencarbid
IIC	Brint, vandgas	Acetylen			Kulstofdisulfid	Ethylnitrat

Class IIB is designated for environments with hazardous gases like ethylene, where T6 specifies that explosion-proof electrical devices must maintain a surface temperature below 85°C.

IICT6

Class IIC applies to extremely hazardous areas with gases such as hydrogen, acetylene, and carbon disulfide. T6 classification ensures that these explosion-proof devices also maintain a maximum surface temperature of no more than 85°C.

Although both classes are rated T6, equipment under Class IIC offers enhanced safety. Consequently, IICT6 holds a higher explosion-proof rating than IIBT6.