Abstract: An ejector for a granular matter color sorter reducing burdens such as cleaning and maintenance in particular associated with a nozzle unit is to be provided. The ejector 10 comprises a nozzle unit 15, a solenoid valve unit 13, and a manifold unit 14. The nozzle unit 15 is constituted by a plurality of nozzle devices 16 that are independent from each other. The solenoid valve unit 13 is constituted by a plurality of solenoid valve devices 19. The respective nozzle devices 16 and the respective solenoid valve devices 19 correspond to each other on a one-on-one basis so that air flow passages of them are connected by an air flow passage of a manifold. The nozzle device 16 and the manifold 29 are detachably connected and made integral in a state where a surface of the nozzle device 16 in which the air flow passage opens and a surface of the manifold 29 in which the air flow passage opens are brought into abutment with each other.

Abstract: A piezoelectric valve whose assembly work can be efficiently performed. A piezoelectric valve according to this invention includes a valve main body having a gas pressure chamber which receives compressed gas supplied from the outside, a plate which is disposed inside the valve main body and is fixed to the valve main body, and actuators each of which has a valve element, a piezoelectric element generating, in the form of a displacement, driving force required for operation of the valve element, and a displacement magnification mechanism for magnifying a displacement of the piezoelectric element and causing the magnified displacement to act on the valve element, are fixed to each of two surfaces of the plate, and are disposed inside the valve main body together with the plate.