Cartridge flow rate adjusting assembly with compensating chamber and hydraulic valve comprising the cartridge flow rate adjusting assembly

A hydraulic valve comprising:

• a valve body having an inlet opening, an outlet opening, and a handling opening;
• and
• a cartridge flowrate adjusting assembly comprising:
• a cartridge body;
• a rod slidingly disposed in the cartridge body and having a first end and a second end opposite the first end;
• a shutter integral formed with the first end of said rod to be slidingly placed against a passage opening of the valve for regulating flow;
• an elastic element coaxially disposed on the rod and in a cavity of the cartridge body to hold the rod with the shutter in a monostable position with respect to the opening of the body;
• a plunger element integral with the rod and slidingly disposed in a chamber of said cartridge body coaxial with said rod and interposed between the shutter and second end;
• a conduit made in said rod and having:
• a first opening at the first end of the rod and in fluid communication with the passage opening of the valve, and
• at least one second opening in fluid communication with a portion of the chamber disposed between the plunger and second end, so that a pressure in said portion of the chamber is equal to a pressure at the passage opening;
• a cylindrical sleeve rotatably disposed inside the hydraulic valve to face a passage gap, wherein the sleeve comprises:
• at least one first opening in a wall of the sleeve and shaped to enable adjustment of a maximum flow rate of the valve within a first range according to a first scale;
• and
• at least one second opening in said wall that is capable of regulating the maximum flow rate of the valve within a second range according to a second scale.