Piezoelectric valve for pressure chambers, has bellows surrounding intermediate zone of mobile needle and securely attached to needle and valve body at its ends, and flexible blade for guiding needle

摘要

The valve has a body (3), and a seat (2) situated in a pressure chamber (7) and integral with the valve body. The valve has bellows (9) surrounding an intermediate zone of a needle (4) and securely affixed to the valve body at one end and to the needle the other end, to isolate an actuator (1) from the chamber. A flexible guide blade (8) guides the needle.