QB explosion proof overhead crane is applicable to the place in the factory where the capability of explosive is no higher than grade II B or II C, and where has mixture of detonating gas which is composed of flammable gas or steam, whose ignition temperature team belongs to T1-T4 team.
QB electric explosion proof overhead crane and its components are all designed and manufactured according to satisfy standards stipulated by GB3836.2-2000 explosion-proof, and its performance of the crane satisfies demands in JB/T 5897-1991.
The explosion-proof overhead crane has obtained explosion-proof certificate after passing examinations by units designated by the governments to test explosion-proof products, the explosion –proof marks are ExdII BT4 and ExdII CT4 respectively.
This explosion proof overhead crane transmission is not higher than IIB or IIC and the ignition temperature group of inflammable gas or explosive mixture of steam and gas is not lower than T4 applicable dangerous zones are zone 14 and zone2.
The explosion proof overhead crane is generally controlled on the ground but control from the cabin is also allowable according to the special demand, the working grade is intermediate.
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