Founded in 2019 and located in Wenzhou, Zhejiang, HOV specializes in the R&D and manufacturing of butterfly valves and knife gate valves, and holds ISO9001 certification. Its butterfly valve series include concentric soft-sealed, double-offset soft-sealed, fully lined rubber, fully lined PTFE, triple-offset hard-sealed, and ventilation butterfly valves. Its knife gate valve series include knife gate valves, through-conduit slide gates, square slide gates, and ceramic valves. These products are widely used in water treatment, electric power, metallurgy, petroleum, chemical, food, pharmaceutical, marine, environmental protection, HVAC, fire protection, and other industries.