Abstract: The proportional valve is insertable in a support element and comprises a hollow body having a plurality of inlet openings, a plurality of outlet openings and a plurality of discharge openings. The hollow body further comprises a pilot channel afforded in a base surface, an end of which pilot channel can be closed by a bearing. The valve comprises an obturator which is predisposed to place in communication the inlet, outlet and discharge openings selectively. The obturator exhibits an internal channel which transmits a pressure in the inlet openings to the bearing. The hollow body is screwed to a container which houses an electromechanical actuator that acts on the bearing. The valve can be connected to the support element by means of a screw.