Gas burner tap (1; 101; 201), comprising: - a valve body (2; 102; 202) provided with at least one inlet section (2a; 102a; 202a) and at least one outlet section (2b; 102b; 202b) for the gas; - at least one plug (3; 103; 203) constrained inside said valve body between said at least one inlet section (2a; 102a; 202a) and at least one outlet section (2b; 102b; 202b) and rotatable between at least one angular interdiction range, wherein the fluidic communication between said at least one inlet section (2a; 102a; 202a) and said at least one outlet section (2b; 102b; 202b) is blocked, and at least one angular range (P2.1 - P2.2) of regular functioning of the tap (1; 101; 201), wherein said at least one outlet section (2b; 102b; 202b) is fluidically connected to said at least one inlet section (2a; 102a; 202a) for the outflow of first flow rates of gas (Fo) from said at least one outlet section; - at least one auxiliary duct (4; 104; 204) obtained in said valve body (2; 102; 202) and/or in said at least one plug (3; 103; 203) for the fluidic connection between said at least one inlet section and said at least one outlet section, for the outflow of a second flow rate of booster gas (Fb) from said outlet section; - -at least one first cut-off (5; 105; 205) housed at least partially inside said valve body (2; 102; 202) and movable by control between a first position, in which the fluidic communication between said at least one inlet section (2a; 102a; 202a) and said at least one outlet section (2b; 102b; 202b) is blocked at least through said at least one auxiliary duct (4; 104; 204), and a second position, wherein the fluidic communication at least between said at least one inlet section (2a; 102a; 202a) and said at least one outlet section (2b; 102b; 202b) is allowed through said at least one auxiliary duct (4; 104; 204), for the outflow of at least said second flow rate of booster gas (Fb) from said outlet section (2b; 102b, 202b), and characterized by comprising at least one first driving rod (45; 145; 245) movably housed in said at least one plug (3; 103; 203) or in said valve body (2; 102; 202), so that to translate between a rest position and a drive position for displacing said at least one first cut-off (5; 105; 205) from said first position to said second position. - a valve body (2; 102; 202) provided with at least one inlet section (2a; 102a; 202a) and at least one outlet section (2b; 102b; 202b) for the gas; - at least one plug (3; 103; 203) constrained inside said valve body between said at least one inlet section (2a; 102a; 202a) and at least one outlet section (2b; 102b; 202b) and rotatable between at least one angular interdiction range, wherein the fluidic communication between said at least one inlet section (2a; 102a; 202a) and said at least one outlet section (2b; 102b; 202b) is blocked, and at least one angular range (P2.1 - P2.2) of regular functioning of the tap (1; 101; 201), wherein said at least one outlet section (2b; 102b; 202b) is fluidically connected to said at least one inlet section (2a; 102a; 202a) for the outflow of first flow rates of gas (Fo) from said at least one outlet section; - at least one auxiliary duct (4; 104; 204) obtained in said valve body (2; 102; 202) and/or in said at least one plug (3; 103; 203) for the fluidic connection between said at least one inlet section and said at least one outlet section, for the outflow of a second flow rate of booster gas (Fb) from said outlet section; - -at least one first cut-off (5; 105; 205) housed at least partially inside said valve body (2; 102; 202) and movable by control between a first position, in which the fluidic communication between said at least one inlet section (2a; 102a; 202a) and said at least one outlet section (2b; 102b; 202b) is blocked at least through said at least one auxiliary duct (4; 104; 204), and a second position, wherein the fluidic communication at least between said at least one inlet section (2a; 102a; 202a) and said at least one outlet section (2b; 102b; 202b) is allowed through said at least one auxiliary duct (4; 104; 204), for the outflow of at least said second flow rate of booster gas (Fb) from said outlet section (2b; 102b, 202b), and characterized by comprising at least one first driving rod (45; 145; 245) movably housed in said at least one plug (3; 103; 203) or in said valve body (2; 102; 202), so that to translate between a rest position and a drive position for displacing said at least one first cut-off (5; 105; 205) from said first position to said second position.