A barbecue grill and components thereof that allow a user to obtain a controlled burst of high intensity heat for a limited period of time, comprising at least one quick sear burner, a quick sear valve assembly adapted for fluid communication with the quick sear burner, and a cooking surface adapted to be positioned above the quick sear burner in or on a firebox of a barbecue grill. The quick sear valve assembly, in turn, comprises a main valve for normal operation of the quick sear burner, and a bypass valve for high intensity heat output of limited duration. The quick sear valve assembly includes a mechanism that is configured to allow the user to selectively actuate the bypass valve.

A barbecue grill and components thereof that allow a user to obtain a controlled burst of high intensity heat for a limited period of time, comprising at least one quick sear burner, a quick sear valve assembly adapted for fluid communication with the quick sear burner, and a cooking surface adapted to be positioned above the quick sear burner in or on a firebox of a barbecue grill. The quick sear valve assembly, in turn, comprises a main valve for normal operation of the quick sear burner, and a bypass valve for high intensity heat output of limited duration. The quick sear valve assembly includes a mechanism that is configured to allow the user to selectively actuate the bypass valve.

A gas control valve for a hob includes a valve housing, and a valve body accommodated in the valve housing. The valve body is rotatable in a predetermined direction of rotation from a closed position, in which the gas control valve is closed, into an open position, in which the gas control valve is open. The valve body is rotatable in the predetermined direction of rotation beyond the open position into a low-flame position when the valve body is rotated from the open position into the low-flame position for controlling a flow volume of combustion gas flowing through the gas control valve/ The valve body is rotatable in opposition to the predetermined direction of rotation from the open position into a booster position, in which the flow volume of combustion gas is greater than the flow volume of combustion gas in the open position.

A barbecue grill and components thereof that allow a user to obtain a controlled burst of high intensity heat for a limited period of time, comprising at least one quick sear burner, a quick sear valve assembly adapted for fluid communication with the quick sear burner, and a cooking surface adapted to be positioned above the quick sear burner in or on a firebox of a barbecue grill. The quick sear valve assembly, in turn, comprises a main valve for normal operation of the quick sear burner, and a bypass valve for high intensity heat output of limited duration. The quick sear valve assembly includes a mechanism that is configured to allow the user to selectively actuate the bypass valve.

A combustion system including a bypass which opens to the open air during two different operating modes (conventional combustion; oxy-combustion), and which has the function, on the one hand, in the two operating modes, when the discharge valve is at least partially open and the recycling valve is closed or open, of allowing air to enter the recycling loop, and which has the function, on the other hand, in the second operating mode, when the discharge valve is closed and the recycling valve is open, of allowing a surplus of the combustion gas produced by the combustion device to be discharged from the recycling loop, the other fraction of the combustion gas produced by the combustion device supplying the mixer.