Systems and methods for operating a gas-fired appliance such as a gas-fired cooking grill are provided. An embodiment of the system includes a gas burner for heating a chamber of the gas-fired appliance. The system includes a first valve associated with the gas burner to control a gas flow to the gas burner. The system includes a second valve configured to controllably supply gas to the gas burner via the first valve. The second valve is automatically adjustable based on a desired temperature of the chamber and an actual temperature of the chamber.

Systems and methods for operating a gas-fired appliance such as a gas-fired cooking grill are provided. An embodiment of the system includes a gas burner for heating a chamber of the gas-fired appliance. The system includes a first valve associated with the gas burner to control a gas flow to the gas burner. The system includes a second valve configured to controllably supply gas to the gas burner via the first valve. The second valve is automatically adjustable based on a desired temperature of the chamber and an actual temperature of the chamber.

The disclosed technology includes a gas delivery system for controlling a target gas input rate of a fluid heating device. The system can include a sensor configured to measure a temperature of a gas flowing in a gas flow path, a modulating orifice in fluid communication with the gas flow path, and a motor in mechanical communication with the modulating orifice. The system can further include a controller configured to receive temperature data indicative of the temperature of the gas. The controller can determine a target cross-sectional area of the modulating orifice based at least in part on the target gas input rate and the temperature of the gas and, in response, output a signal to the motor to transition the modulating orifice from a first position to a second position having the target cross-sectional area.

A stand-alone gas-fired smoker constitutes a cabinet for holding food products to be cooked. A gas burner in the bottom of the cabinet is connected to a source of flammable gas by means of a variable gas valve. The gas burner heats the cabinet and thereby cooks the food products. An oil filled temperature sensing bulb is connected by means of a capillary tube to the variable gas valve in order to modulate the gas delivered through the variable gas valve to the gas burner and thereby modulate the temperature within the cabinet. A safety/ignition valve is connected between of the gas source and the variable gas valve. The safety/ignition valve is connected to a flame sensor, and the safety/ignition valve closes if the flame sensor senses that the gas burner has been extinguished.

A stand-alone gas-fired smoker constitutes a cabinet for holding food products to be cooked. A gas burner in the bottom of the cabinet is connected to a source of flammable gas by means of a variable gas valve. The gas burner heats the cabinet and thereby cooks the food products. An oil filled temperature sensing bulb is connected by means of a capillary tube to the variable gas valve in order to modulate the gas delivered through the variable gas valve to the gas burner and thereby modulate the temperature within the cabinet. A safety/ignition valve is connected between of the gas source and the variable gas valve. The safety/ignition valve is connected to a flame sensor, and the safety/ignition valve closes if the flame sensor senses that the gas burner has been extinguished.

The aim is to provide a gas control valve in which the specified desired value range can be subsequently shifted easily in order to optimize the range of settable temperatures for the heating device without exceeding the device- and/or installation-specific admissible use conditions. To this end, a setting element (17) which serves to change the position of a temperature-sensitive element (8) and thus to actuate a switch for activating a valve has a threaded part (12) that is screwable into the housing (1) of the gas control valve. In this case, the two are connected together in a rotationally secure manner via a releasable locking mechanism, wherein a tubular latching part (14) that is firmly connected to the threaded part (12) is arranged between the pot-like setting element (17), partially surrounding the threaded part (12) with a recess (18), and the threaded part (12). By way of a stop element (16) that protrudes from the end side, the latching part (14) projects into a guiding contour (19) which is formed by an end-side aperture located in the setting element (17).