... Ball Valves 1.Small resistance 2.GB / Barton /ANSI / JIS / DIN etc. 3.Good service 4.Top quality 1. Ceramic Lined Ball ... used widely in many fields. Meanwhile, R&D of the ceramic valves is a state-sponsored project. Characteristic:l V-shape ball body ... standard of the ISO9001 Quality Control System.JOHNCERA ceramic valves are widely used in power plants, chemical industry, petroleum, smelting, cement, ...