Unlike conventional Ball Valves the ball assembly consists of one solid piece without any looseness so that there is no deterioration of lining in the area of Ball Stem Selding. The thickness of the lining is absolutely constant throughout to avoid any deformation of the ball.The body is a two piece construction and is manufactured out of Ductile Iron Castings. The body is completely lined with FEP PFA for corrosion resistance wherever it contacts corrosive liquid.