Pressure regulator for irrigation plant and irrigation plant comprising the regulator

A pressure regulator for irrigation plant, comprising:

• a main body comprising a primary circuit for the passage of an irrigation liquid having an inlet port connectable to a feeding line for said liquid and an outlet port for supplying said liquid;
• a shuttering element operatively associated to said primary circuit and designed for moving between a first and a second working end conditions corresponding, respectively, to the minimum and maximum values of the flow rate from said outlet port;
• regulation means associated to said shuttering element to bring it in any regulation working condition between and/or corresponding to said first and second end conditions;
• wherein said regulation means comprise a secondary circuit fluidically insulated with respect of said primary circuit and designed for containing a working fluid adapted to apply a pressure on said shuttering element and adjusting its regulation condition.