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Oct 19, 2015 - Figure 2. Iron casting valve manufacturing process. Casting process. Shipment. To air (vaporization and dispersion of solvent). Waste (waste solution). Flow of innovation, the company provides engineered flow-control solutions for manufacturing and quality assurance infrastructure ensure that world-class designs are L&T Valves manufactures a comprehensive range of Ball Valves in sizes. Since 1984 unigrind has been offering high-quality machining and testing products for industrial valves. and flow testing on gates, butterfly valves, valves, ball valves, safety valves, etc. Technology and processes for grinding safety valves. Feb 27, 2020 - Mar 10, 2011 - The main objective of this dissertation is to analyse the design and manufacturing processes of the ball valves used in the oil and gas industry, with special valves: gate valves, ball valves, globe valves, check valves, plug valves, butterfly valves etc.; machining process to ensure the perfect condition of the material. valves: gate valves, ball valves, globe valves, check valves, plug valves, butterfly valves etc.; machining process to ensure the perfect condition of the material.