Fine chemical industry is one of the most dynamic emerging sectors in modern chemical industry and an important component of new‑material industry. It covers more than 40 segments including pharmaceuticals, pesticides, dyes, coatings, pigments, reagents, adhesives, water‑treatment agents, catalysts and auxiliaries, and is closely related to human daily life. Vigorously developing fine chemicals has become a strategic priority for countries worldwide to restructure chemical industry, upgrade industrial level and increase economic benefits. The advancement of fine chemicals provides solid support for high‑tech fields such as biotechnology, information technology, new materials, new‑energy technology and environmental protection. Against the booming growth of fine chemical industry, higher requirements are placed on control valves with increasingly complex service conditions, which draws wide attention from control valve manufacturers.