Abstract: A cylinder (10) for storing pressurized fluid is provided, comprising a hollow body (12) formed integrally with a closed bottom end (14) and a closed upper end (16), a valve (20, 200) having a valve body (24, 205) and an actuator (22, 220), said valve (20, 200) being arranged at said upper end (16) for allowing gas charging and gas discharging, respectively, wherein said valve (20, 200) is mounted on the inside of said cylinder (10) such that the interior surface of said upper end (16) is sealed against said valve body (24, 205), and such that said actuator (22, 220) is extending outside said cylinder (10).