Patent ID: 8919375

Claim:
Valves and fittings apparatus comprising: a valve with a closure member ( 2 ) rotating in unison with a shaft ( 3 ), an actuator (A) driving the shaft ( 3 ) in rotation, and an annular sensor of the rotational position of the shaft ( 3 ) fitted on the shaft ( 3 ), characterised in that the sensor is interposed, in the longitudinal direction of the shaft ( 3 ), between the valve and the actuator (A) and has a thickness, that is, the dimension in the longitudinal direction of the shaft ( 3 ), between 1.5 and 4 mm, the sensor including: an annular target-holder ( 4 a ) carrying a target ( 4 ) sensitive to an action at a distance and fitted on the shaft ( 3 ) in such a way as to rotate in unison therewith and to be able to be displaced in translation along the shaft ( 3 ), a plate-holder ( 5 ), the thickness of which is higher than the thickness of all the other components of the sensor, a small plate ( 6 ) fitted on the shaft ( 3 ) by way of an annular portion ( 6 a ) without being rotationally unified therewith, this portion ( 6 a ) containing two detectors ( 7 , 8 ) of the target ( 4 ), at 90° one with respect to the other, and the target-holder ( 4 a ) and the annular portion ( 6 a ) are in the same plane.