Flow regulator

A flow regulator comprising:

• a housing having a first chamber, a second chamber and a valve seat which is arranged between the first chamber and second chamber;
• a valve head which is arranged in the first chamber and which has at least a first surface which faces the first chamber, a second surface which faces the second chamber when the valve head is in a closed position and a through-hole between the first surface and second surface, the valve head being movable between an open position, spaced apart from the valve seat, and a closed position engaged with the valve seat;
• a shaft of the valve head which is capable of moving the valve head between the open and closed positions, and
• an engaging pin which is at least partially received in the hole of the valve head in a sliding manner, wherein the engaging pin comprises a first head, located in the second chamber, a second head, located in the first chamber, and a rod connecting the first head and the second head, the shaft being connected with the second head of the engaging pin by a thrust bearing device through which the shaft is rotationally disconnected with the second head of the engaging pin, the engaging pin being capable of moving with respect to the valve head between at least one non-sealed position, in which the fluid communication between the first chamber and the second chamber is allowed, and a sealed position, in which the fluid communication between the first chamber and the second chamber is prevented, the engaging pin being in the at least one non-sealed position when the valve head is in an open position and being capable of moving into the non-sealed position when the valve head is in a closed position, and
• at least one resilient element which is capable of acting counter to the movement of the engaging pin from the at least one non-sealed position to the sealed position, the resilient element being a compression spring interposed between the second head of the engaging pin and the first surface of the valve head, the first surface of the valve head having a respective containment seat defining an abutment surface facing the second head of the engaging pin, the compression spring being received in the respective containment seat adjacent the abutment surface.