| 摘要 |
This valve is of the type which is arranged in a wall part 2, made from a moulded material, such as a plastic, of the tank, the part being attached or not attached, including a well 3 which extends towards the inside of the tank and which has, at its end closest to the wall 2 of the tank, a first internal shoulder 7 intended to act as a seat for the disc 4 of the valve and, at its other end, a second shoulder 6 intended to act as a support for the spring 5 for returning the disc 4 to the closed position. The internal shoulder 6 of the well 3 located at its end furthest from the wall part 2 of the tank in which this well 3 is arranged, which shoulder 6 is intended to act as a support stop for the spring 5 for returning the disc 4 to the closed position, consists of a narrowing obtained by permanent deformation of the wall of this end of the well. <IMAGE> |
