Blowers designed for air supply in the furnaces of stoker boilers mostly have a smaller connection frame than standard blowers for hand-fed boilers. This is due to the smaller connection space in the feeder, less room for mounting the forced draft fan. The blowers offered in this group have powder-coated steel housings and an external rotor motor mounted inside two parts of the housing. Depending on the version, the blowers may have a flap at the outlet and air inlet dampers; these elements additionally regulate the airflow through the fan. They are equipped with motors with power ranging from 40 to 80 W, and the power connection elements are cables with computer plugs or computer sockets mounted in electrical boxes.
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