After completion of rerofitting the governing system of a steam turbine into a digital electrichydraulic (DEH) governing system

the function of main oil pump for supplying large amount of oil to the original complete security governing set hadn’t existed

resulting in largely wasting the abundant oil capacity of the said main oil pump in operation for nothing. Through retrofitting the oil sealing system on the air side of generator

the main oil pump can supply oil to the oil sealing system at the airside via an additive facility

thereby large amount of energy can be saved

and the reliability of unit operation being enhanced.