an apparatus for flowing and filling liquified gases , which fuctions to flow and to fill liquified bases into cans from a liquified gas storage tank immediately before seaming of the cans . the apparatus includes a solenoid for attracting an upper portion of a needle of a flow valve formed from a needle valve to open and clode the valve . a pulse motor adjusts an opening - degree of the valve . a valve opening - degree detecting device detects the opening degree . a direction changing nozzle is formed with a nozzle opening obliquely descended in a direction of transporting a can , below the flow valve . a line speed and a balve open amount in a high speed region and a low speed region are respectively set to thereby obtain a line speed / valve opening - degree conversion table , on the basis of which an opening - degree of the valve can be controlled following the line speed .