There are two structural types: type(motor-direct-driving type) and type (Separate cabins type). The construction is spark free. The structure of typeis a motor-direct-driving one. The vane wheel is mounted directly to the motor-shift. And the housing is fixed on the flange of the explosion-proof motor. The type is a separate structure, i.e. the fan and the motor are put into different cabins, with a driving device, a pairs of flexible coupling. And the driving device consists of bearings, bearing-box, shaft, brass rings, stuffing. It can be oiled and measured temperature. One side is fixed on the fan, and the other side will be mounted on the bulkhead. The fan may be made into a horizontal or vertical, single-stage, single-drawing and airtight structure by the customers requesting. The fan can be made into a counter-clockwise rotating type or a clockwise one. The counter-clockwise rotating type (Left turning type)-Taking a front view from the motor side, you will see the vane wheel turns counter-clockwise. We use L to indicate it, and by the same way, the clock wise rotating type can be indicated as R. By your requesting, the outlet position is allowed to use other types,the angle of which is 30°or 22.5°. Features: Explosion-proof, safe and reliable in operation, small in size, light in weight, and low in noise, Well anticorrosive, Strong capable of resisting vacillation,vibration and shocking.