The utility model relates to a low, middling pressure flame device of refusing. Its characteristics are: including dabber (5), the suit remains ball core (3) of processing on this dabber (5), and the one end of this dabber (5) is installed on support frame (6) and its other end is installed on the chuck, and this chuck is connected with motor drive (1) transmission initiatively to can drive mobile core axle (5) and ball core (3) rotation, be equipped with the oxy -acetylene in these ball core (3) top and refuse rifle (2), and be equipped with high -power gas combustion machine (4) in the side of these ball core (3). Adopt the utility model discloses a low, middling pressure flame device of refusing, has effectively solved valve ball core more than the DN200 and lead to melting because the size is big, the caloric receptivity is big cover in -process unit area sintering time overlength, the local temperature is too high on the alloy powder layer, make ball core base member with melt cover that interlaminar stress increases, the oxidation is serious, melt coating and ball core base member within a definite time the defect quality problems such as increase.