Valve group for a pressurised oil circuit

A valve group housable in a duct of a pressurized oil circuit, wherein said duct is formed in a support body in fluidic communication with a heat exchanger so that the duct has at least one inlet mouth and at least one outlet mouth and, on a side wall delimiting the duct, at least one exchanger mouth through which the oil flows in the exchanger;

• wherein the valve group extends in length along an axis, comprising:
• a valve body extending along the axis axially fixed to the support body;
• an obturator extending along the axis fitted axially movably on the valve body;
• the obturator comprising:
• a primary obturator opening and a secondary obturator opening axially spaced from each other through which the oil flows towards the heat exchanger when positioned respectively facing the exchanger mouth, in a first operating configuration and a third operating configuration;
• an outlet opening through which the oil flows when the obturator is placed in a second operating configuration and/or in a venting configuration;
• means for positioning and moving the obturator comprising:
• a temperature sensitive device engaging the obturator to guide the obturator, depending on oil temperature, into an axial position corresponding to the second operating configuration or the third operating configuration;
• a pressure sensitive device suitable to keep the obturator in an axial position corresponding to the first operating configuration and to allow the movement of the obturator, depending on oil pressure, in an axial position corresponding to the venting configuration.