Explosion-proof solenoid valve grade standard introduction

In the special working environment, in order to avoid external factors interfering with the hydraulic system work, the explosion-proof series requirements are often used. The explosion-proof coefficient of the explosion-proof solenoid valve is clearly divided. Today we will understand the explosion-proof grade standard of the explosion-proof solenoid valve.

China's explosion-proof grade standard is “gb3836.1-2000” and will be supplemented or modified.

Electrical equipment for explosive environments. Part 2: Fire "D"

Electrical equipment for explosive gas atmospheres. Part 3: Increased safety type "E"

Electrical equipment for explosive atmospheres - Part 4: Intrinsic safety "I"

Electrical equipment for explosive atmospheres - Part 5: Positive pressure "P"

Electrical equipment for explosive environments. Part 6: Oil-filled "O"

Electrical equipment for explosive atmospheres - Part 7: Sand filling moulds Q

Electrical equipment for explosive atmospheres - Part 9: ladle "M"

GB 7957 mine helmet light

The above standards and this standard do not apply to medical electrical equipment, detonators, detonator testers and ignition circuit testers

Common symbols "EXDI, IIBT3"

"EX" is a universal symbol that represents the power of destruction

“D” means that the secondary explosion-proof type is “explosion-proof D”.

Or "III" electrical equipment classification, in addition to coal mines in coal mine electrical equipment I, II explosive gas environment and other equipment. Among them, the explosion-proof class II "D" and "intrinsically safe" I "electrical equipment is divided into II, IIIIC and B.

T3 represents the temperature group.