The structural principle of the ball honing device is shown in the figure. It is mainly composed of rear axle, middle axle, joint bearing, ball head axle, spring, honing head, frame assembly, etc. The honing head is made of metal in the shape of a bowl. The inner cone of the metal bowl can be inlaid with resin as many as possible according to the specific situation. The particle size and hardness of oilstone strips can be selected according to different ball materials and surface roughness. The surface of the bonded oilstone strip shall be corrected on an ordinary lathe.

Pneumatic rubber lined butterfly valve, with flange and clamp connection, and sealing lining of NBR, EPDM, heat resistant EPDM, natural rubber, neoprene, fluororubber, polytetrafluoroethylene, has a more reasonable choice according to the chemical properties of the medium.