1.Do the impeller balance testing before leaving the factory.
2.During the rotation of the impeller, the pattern on the impeller will affect the judgment of the eye, and it cannot be judged by whether it looks round.
3.The number represented in the picture is the unbalanced margin of impeller at different angles.
For example,the impeller is 0.46 grams less at 56°. Based on professional references and technical feedback the work flow, The impeller is tested on a dynamic balancing machine until the required balance accuracy is achieved, requiring an unbalanced margin≤2g.mm. And according to the machine,our unbalanced margin has reached ＜1g.mm.
4.We make sure that our impeller must be balanced before leaving the factory.