... Alumina Ceramic Valve core, water valve,gas valve Ceramic valve for water,gas,oil and acid. Material: 95%Al2O3 Density: 3.6 Watervalve,ceramic ... resistant materials, with unique molding method, Abrasion resistant ceramic is sintered by 1600 and achieve 95 porcelain standard. ... design to cushion material lining and avoid breaking the ceramic. Range of applicationThermal power plant,steel,coal, pier ...