A coaxial gas valve assembly includes a gas inlet, a gas outlet, a valve tube, and a shaft member. A main valve is movable between a closed position and an open position (broadly, openable and closable). A main spring is positioned to resiliently bias the main valve in its closed position. A redundant valve is movable between a closed position and an open position (broadly, openable and closable). A redundant spring is positioned to resiliently bias the redundant valve in its closed position. A solenoid coil is positioned to electromagnetically move the shaft member within the valve tube. A balance diaphragm is connected to the valve tube. A gas path through at least the valve tube allows gas flow from a first side of the balance diaphragm to a second side of the balance diaphragm to reduce a pressure difference between the first and second sides of the balance diaphragm.

A cooking appliance that includes: a gas cooking element; an igniter located next to the gas cooking element to ignite the gas cooking element; a gas valve for regulating gas flow to the gas cooking element; a burner control coupled to the gas valve to vary the gas flow to the gas cooking element; and a control circuit coupled to the burner control and for activating the igniter when the burner control is positioned within a predetermined range of positions, where the control circuit detects when the burner control has been moved through the predetermined range of positions in less than a predetermined time, and in response to determining that the burner control has been moved through the predetermined range of positions in less than the predetermined time, generate an alert to a user.

An electronically controlled burner management system for oilfield process equipment. The system includes a vessel fluid temperature sensor and electronic valve for interruption of main burner fuel flow. When process equipment is retrofitted with this system total gas production is increased, reduces fugitive emissions of unburned gas, and reduces hazards. The system integrates with existing pneumatic thermostatic control, making it easy to control and can be bypassed in the event of failure.

The disclosure provides a combustion device for burning LP gas filled in a gas cylinder as fuel in a combustion unit. The combustion device includes: a control unit for controlling a combustion operation based on a preset operation table such that a combustion output reaches a target output, and an output detection part for detecting the combustion output. In a case where the combustion output detected by the output detection part is risen by a reference value or more relative to the target output, the control unit notifies of a lowering in the remaining amount of LP gas in the gas cylinder.

Cooktop appliances are provided. A cooktop appliance can include a gas burner; a manifold having a gas input; a primary line extending between the manifold and the gas burner, wherein the primary line operates as a non-modulated minimum gas flow line when the cooktop appliance is in an automatic mode; a secondary line extending between the manifold and the gas burner, wherein a gas flow rate of the secondary line is controllable by a flow control valve; a primary valve in fluid communication with at least the primary line; and a control system including: a sensor configured to detect a temperature corresponding to the gas burner; and a controller regulating: (i) the flow control valve in response to the detected temperature to achieve a desired temperature, and (ii) the primary valve when the flow control valve is closed and the detected temperature exceeds the desired temperature.

Cooktop appliances are provided. A cooktop appliance can include a manifold having a gas input; a first burner in fluid communication with the manifold through a first burner supply line having a first valve; and a second burner in fluid communication with the manifold through a second burner supply line having a second valve, the second burner arranged coaxially with respect to the first burner, wherein the second burner supply line comprises a primary line, a secondary line, and a sum line, the sum line providing a combined flow of gas from the primary line and the secondary line to the second burner, wherein the secondary line of the second burner comprises a third valve.

An apparatus includes a high-pressure tank, a controller, a valve, controlled by the controller, and a heater.

Control unit for detecting a flame in operation using flame monitors suitable for burners operated using a fuel, wherein the flame monitor comprises at least one sensor as operating means for detecting the radiation emission from a flame as a visible reaction between fuel and oxidizing oxygen in a combustion region, and an evaluation circuit associated with the at least one sensor, the evaluation circuit determining whether the radiation received by the sensor corresponds to that of a burning flame and, if the result is negative, generating a fuel supply switch-off signal, wherein at least two flame detectors are connected in such a way that a basic electrical circuit is formed which processes the output signals of the at least two flame monitors via closing contacts in an OR operation or via closing contacts in an AND operation, depending on which of at least two operating states of flame detection is assigned to the output signals of the flame monitors, and a switching logic is provided for switching between the at least two operating states, which logic links an intelligent subsystem with a logic function plan.

Apparatus to deliver gas having a delivery pipe that extends from an entrance end to a gas delivery end along which there are, one after the other, an entrance component, a pressure regulator and a flow rate regulator coordinated with respect to each other to supply on each occasion the desired quantity of gas to a burner of an apparatus fed by gas, or by a mixture of air/gas.

Food cooking unit composed of gas burners (1), regulation electrovalves (3) of the supplied gas; an infrared sensor (5) focused towards the cooking zone; a thermocouple (6) in thermal contact with the flames and in connection with a safety electrovalve (4) through a relay (10) and an electronic control device (7) connected to said infrared sensor (5), to said at least one regulating electrovalve (3) and the relay (10) and that stores different regulation programs and that regulates the regulating electrovalve (3) and/or interrupts the thermocouple connection with the safety electrovalve in response to the signals obtained from the infrared sensor (5) and/or the thermocouple (6), and issues warnings in response to signals from the thermocouple (6).