Valve and container with a valve

A container for fluid under pressure comprising:

• a body for containing the fluid under pressure;
• and
• a valve of the female aerosol type, intended to be compatible with apparatus for use with piercable cartridges having an annular seal and a piercing needle arranged within said annular seal, said valve having the shape of a solid of revolution and comprising:
• a metal cup forming, an succession from the outside towards its center, an annular rim, a bottom situated in a lower transverse plane below the annular rim, an axial boss standing out from the transverse plane, the top of which has a central opening, said top having concave surface extending radially from the central opening to the peripheral rim of the boss, and the opening having a diameter to accommodate concentricity variations of the piercing needles of the appliances
• a valve body fixed in a gas-tight manner to the interior of the boss
• a valve member movable in the interior of the valve body, urged resiliently towards the top of the boss, having a central part for receiving the tip of a piercing needle and a peripheral lip
• a resilient transverse seal enclosed in said boss, having a concave shape, in correspondence to the concave surface of the top of the boss, said seal being engaged by the peripheral lip of the valve member in the closed position of the latter.