23 Year Industrial Explosion-Proof Manufacturer

Explosion-Proof Level Da Db Dc

Gb: Specifies protection levels for Category 1 and 2 devices. Importantly, the updated explosion-proof markings further divide the flameproof category into da, db, and dc.

IIICT 135℃DbIP65
III
Surface dust
T1 450℃Ma IP65
T2 300℃Mb
T3 200℃
A
Flammable flying flocs
Da
T4 135℃
Db
B
Non conductive dust
T2 100℃Dc
C
Conductive dust
T6 85℃

da:

Designed exclusively for catalytic sensors in combustible gas detectors, and is approved for use in Zone 0.

db:

A prevalent standard, db denotes the conventional flameproof type.

dc:

Intended for use with switch contacts and EX components within electrical devices.

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