Valves based on reversible piezoelectric rotary motor

A piezoelectric valve, comprising:

• a valve body with at least one inlet, at least one outlet, and a turning plug;
• a rotation drive kinematically connected to said turning plug through a shaft, said rotation drive comprising a reversible piezoelectric motor, and said reversible piezoelectric motor comprising:
• a first annular piezoelectric resonator, said first piezoelectric resonator fixed with respect to the body,
• a first complementary generator acoustically coupled to the first piezoelectric resonator and having one or more first flexible pushers,
• a first rotor mounted coaxially with respect to the first piezoelectric resonator and in frictional contact with said first flexible pushers,
• a second annular piezoelectric resonator statically coupled to the turning plug through the shaft,
• a second complementary generator acoustically coupled to the second piezoelectric resonator and having one or more second flexible pushers, and
• a second rotor mounted coaxially with respect to the second piezoelectric resonator and in frictional contact with said second flexible pushers, said second rotor statically coupled to said first rotor through a sound-proof gasket.