VALVE INSTALLATION STRUCTURE FOR MOUTHPIECE OF PRESSURE VESSEL

摘要

PROBLEM TO BE SOLVED: To provide a novel valve installation structure for a mouthpiece of a pressure vessel for solving a problem of gas leak related to a valve installation structure having a straight screw. SOLUTION: In this valve installation structure for a mouthpiece for a pressure vessel, a valve fitting part is fitted to the mouthpiece of the pressure vessel by the straight screw. O-ring seal parts are provided between a tip of the mouthpiece and the valve fitting part, and between an inner side surface of the mouthpiece and an outer side surface of the valve fitting part.