| 摘要 |
The present invention relates to a ball valve comprising a ball unit mounted in the chamber of a valve main body to be able to rotate; a sheet installed in one of a first channel and a second channel and presses a spherical surface when the ball unit is located at a closing position; a sheet retainer which is arranged to surround the outer surface of the sheet, is installed to be able to relatively rotate around the sheet, has a protrusion interfering with the sheet in the axial direction of the sheet to move toward the ball unit together with the sheet, and has a protrusion in the axial direction of the sheet; a guide retainer arranged to surround the outer surface of the sheet and has a side which faces the sheet retainer and the protruding degree toward the central axis of the sheet of which is continuously changed; and a spring compressed and installed between the guide retainer and the valve main body so that the ball valve opening and closing a flow can be maintained and replaced without disassembling both connection pipes of the ball valve. |
