Shanghai Weizhi Machinery Works is a manufacture of compressed air-operated products to solve problems in industrial plants.Our product line includes Vortex Tubes and applied products utilizing Vortex Tubes,Air Amplfiers, Hand Air Guns,Air Operated Conveyors,Air Kinves.Weizhi product is a dynamic source of compressed air, no power, no chemicals, safe and reliable energy conservation and environmental protection high-tech new product