The invention concerns a valve operator assembly for valve. The valve provides a valve body and a valve translating member axially moveable. The valve operator assembly provides a housing adapted to be mounted on the valve, an input member rotatably mounted with respect to the housing, and a transmission mechanism. The transmission mechanism provides a translating element connected to the valve translating member and a rotating element connected to the input member, the transmission mechanism being adapted to convert applied rotation of the input member into axial translation of the translating element. The valve operator assembly further provides a spacing element adapted to be connected on the valve body on one end and on the housing on the other end, the spacing element having an almost tubular shape defining an axial bore through which at least partly passes the valve translating member and the translating element of the transmission mechanism.
