How to distinguish the quality grades of rubber joints?

1. Spherical protuberance includes air membrane and dura mater. The inner wall of the gas film ball is smooth, and there is a die gap on the inner wall of the dura mater ball. The essential difference between them is the different processing technology. Hard rubber ball is an old processing technology that has been eliminated before. The ball will have the disadvantage of rapid aging during use. The gas film rubber ball adopts the latest processing technology and has the advantages of high pressure resistance and long service life.

2. The hardness of the inferior rubber joint ball can't be reached, and there will be dents when it is gently squeezed, and the length of the ball will be shortened, so it is difficult to recover;

3. When observing inferior rubber joints, there are bubbles and delamination. Only by mastering the above three points can we have a certain understanding of rubber joints. Not only that, for those unscrupulous businessmen, there is also reason to blame the degree of product decay. For qualified products, there will be some differences in grades according to grades.