The mining industry including mining & metallurgy (beneficiation + smelting) has a high requirements for valves under severe conditions in the mineral and smelting processes. The medium usually has characteristics of large particles, high hardness, high viscosity, strong acid and alkali, etc. The valve should be wear-resistant, corrosion resistant, and excellent in circulation performance when selecting the valve. HIVAL® includes knife gate valves, metal seated ball valves, double/triple off-set butterfly valves, which are generally made of cast iron, carbon steel, stainless steel, etc.