After the completion of vulcanization, electric butterfly valves often need some post-treatment to become qualified products. This includes:
① Edge removal and trimming of mold products to make the surface smooth and the overall dimensions meet the requirements;
② Through some special processes, such as surface treatment of products, the service performance of products for special purposes has been improved;
③ Products containing fabric framework, such as tape and tire, shall be cooled by hot stretching and cooled under inflation pressure after vulcanization to ensure stable size and shape of products and good service performance.