Bypass and pressure adjustment valve

A bypass valve, comprising:

• a main conduit (10), comprising a first section (11) and a second section (12);
• a mobile control shutter (21);
• a bypass conduit (30) which places the main conduit (10) in communication with a discharge opening;
• a control element (31), mobile between a closed position, at which it closes the bypass conduit (30), and an open position, at which it opens the bypass conduit;
• a first piloting conduit (110), which places the first section (11) in communication with a first piloting side of the control element (31), in order to pilot the control element (31) towards the closed position;
• a second piloting conduit (120), which places the second section (12) in communication with a second piloting side of the control element (31), in order to pilot the control element (31) towards the open position;
• a throttle element (40), interposed between the first section (11) and the second section (12), structured to produce a load loss which depends on the fluid flow rate in transit along the main conduit (10);
• characterised in that:
• the control element (31) is tubular-shaped and defines internally a section of the bypass conduit (30);
• the control element (31) is slidable along a housing (32) provided with a sealing seat (33);
• a passageway (34) is predisposed between the control element (31) and the housing (32) which places the first section (11) in communication with the second section (12);
• in the closed position, the control element (31) is in contact with the sealing seat (33) and the shutter (21);
• in the open position, the control element (31) is detached from the sealing seat (33) and frees the passageway (34), enabling a flow of fluid.