Hydraulic separator with reduced heat dispersion and control method therefor

A control method for hydronic plants for heating and/or cooling, comprising the steps of:

• providing a hydraulic separator comprising a control unit, a plurality of electric or electronic sensors or transducers connected to the control unit, and a hollow body with a casing, the interior of the casing defining a chamber;
• supplying a delivery of fluid through at least two first openings of the body and returning the fluid through at least two second openings of the body, the first openings and said second openings being configured to put the chamber of the body in fluid communication with one or more external circuits by hydraulic connections;
• separating the chamber into a first portion and a second portion by at least one thermally insulating butterfly valve to limit thermal heat conduction between the first portion and the second portion of the chamber;
• and
• measuring a physical parameter of the fluid with said sensors, at least one sensor of said sensors being positioned at or between at least one of the first through openings and at least one of the second through openings;
• sending a pressure difference signal with and from said sensors to the control unit corresponding to the physical parameter of the fluid measured by said sensors;
• controlling at least one actuator connected to the at least one thermally insulating butterfly valve with the control unit responsive to the pressure difference signal to control the passage opening and section of thermal contact with the at least one thermally insulating butterfly valve according to a function of the flow of a fluid between the first portion and the second portion in such a way as to limit the thermal heat conduction between the first and second portions of the chamber.