Electric three-piece internal thread, clamp, and welded ball valve are important actuators in industrial automation control systems. They can be controlled remotely and can meet the needs of computer program control; now in petrochemical, gas equipment, nuclear industry, power equipment, environmental protection Water treatment, HVAC, iron and steel metallurgy, industrial kilns, canning equipment, brewing equipment, drying equipment, vacuum equipment, surface treatment, bio-pharmaceuticals, food machinery, textile printing and dyeing, papermaking and other industries are widely used, but also national defense The first choice for construction and technological construction.