Piezoelectric valve

A valve, comprising:

• a valve body;
• a seat situated in a pressure chamber and integral with the valve body;
• a mobile needle having a movement controlled by an amplified piezoelectric actuator;
• a bellows surrounding an intermediate zone of the needle and securely affixed, at a first end, to the valve body and, at a second end, to the needle so as to isolate the actuator from the pressure chamber;
• at least one flexible guide blade for guiding the needle being fixed on the one hand to the valve body and on the other hand to the needle;
• a second flexible guide blade, the flexible guide blades being arranged on each side of the bellows;
• and
• a cover securely affixed to the valve body, the first end of the bellows being fixed onto the cover, fixing of the flexible blade to the valve body being achieved by engagement between the cover and the valve body.