A valve for a pressurized fluid apparatus, the valve comprising:
- a body, having:
- a central conduit coaxial with a central axis, the central conduit opening out at a body distal end belonging to the body and defining a conduit distal end, which ends the central conduit and opens out to the body distal end, wherein the conduit distal end forms a rim;
- an annular cradle, formed at the body distal end, wherein the rim borders the annular cradle from the inside of the annular cradle;
- and
- a body groove, which is formed at the body distal end, which externally borders the annular cradle and which is recessed parallel to the central axis, wherein the body groove comprises a groove proximal rim and a groove distal rim, between which the body groove is delimited, and wherein the conduit distal end is offset relative to the groove distal rim in the distal direction;
- a piston, accommodated in the central conduit, protruding out from the central conduit at the body distal end and sliding relative to the body along the central axis between a proximal position and a distal position, wherein in the distal position, the piston is offset from the proximal position along a distal direction, the distal direction being parallel to the central axis;
- and
- a diaphragm, comprising:
- a peripheral annular ring, accommodated in the body groove so as to be positioned on the body and surrounding the piston, wherein the diaphragm is attached to the body distal end by the annular peripheral ring, wherein the annular cradle extends radially between the central conduit and the peripheral annular ring;
- an internal annular ring, attaching the diaphragm to the piston and surrounding the piston;
- and
- an annular membrane, connecting the peripheral annular ring to the internal annular ring, around the piston, so that the diaphragm separates the central conduit from a pressurized fluid chamber belonging to the pressurized fluid apparatus and being delimited beyond the diaphragm;
- wherein:
- the diaphragm is configured to be elastically deformed between:
- an initial shape, wherein the annular membrane is spaced from the annular cradle, the diaphragm taking the initial shape when the piston is in the distal position and no overpressure occurs in the pressurized fluid chamber relative to the central conduit;
- and
- stretched shapes, wherein the annular membrane comes in contact and mates with the annular cradle, and the diaphragm takes one of the stretched shapes under the effect of an overpressure occurring in the pressurized fluid chamber relative to the central conduit.