Drill a hole with the same size as that of diameter of nozzle pipe on hopper or tank wall, insert the nozzle, and then do welding. This completes the installation. Easy installation and easy completion of installation reduce the installation cost. Previously, the nozzle was directly welded to the hopper, but in this model, the previous specification is changed to that in which the nozzle is pulled out and inserted with the base mounted to the target object. In addition, the nozzle tip is equipped with heat-resistant silicon O-ring to prevent the powder from leaking.