Kettle mechanical seal (mechaincal seal)(shaft seal)(seal) Code and list choosing and using of moving and stopping loop material of kettle mechanical seal Materialscode NO.Apply the categoryAlumina potteryLCorrosive medioum excepting for hydrofluoric acid high-thickness hot alkali dirt,weak aicd,alcohol,etcMetals potteryJoil,slop,weak acid,acid etc,mediumHard alloyDgoil,dirt,weak acid and alkali, ...