According to one embodiment a valve arrangement for a gas burner is provided that includes a manual gas valve with a manual actuator for opening or closing the gas flow, and an electromagnetic valve having a movable closure member which allows opening or closing a gas passage to the burner. The electromagnetic valve is arranged in the gas valve, with the manual actuator being coupled to a rotary flow regulating element, the manual actuator being configured in order to move the closure member of the electromagnetic valve, opening the gas passage, the manual gas valve including a reduced gas flow channel which puts the inlet conduit in fluid communication with the regulating element regardless of the position of the closure member.

In a gas turbine combustor 3 of the present invention, an air hole plate 20 includes a center air hole group 51 configured from a plurality of air holes 51A and 51B and a plurality of outer circumferential air hole groups 52 configured from a plurality of air holes 52A, 52B, and 52C and formed to surround the center air hole group 51. The gas turbine combustor 3 includes a hole part 601 and a temperature sensor 401 provided on the air hole plate 20 to be located in a region surrounded by two outer circumferential air hole groups 52 adjacent to each other and the center air hole group 51, a supply source 220 of coolant, a cooling pipeline 205 that connects the hole part 601 and the supply source 220, valves 67 and 68 provided in the cooling pipeline 205, and a control system 500 that drives the valves 67 and 68 on the basis of a measured value of the temperature sensor 401.

A control device for gas appliances comprises at least one control module (20) having a supporting structure that can be associated to a gas tap (10) and defines a housing, contained within which is at least one first part of a circuit arrangement. The control module (20) comprises a command element operable by a user for activating at least one timing function and/or a function of ignition of a gas burner. The first part of the circuit arrangement comprises control elements, electrical-interconnection elements, and detection elements (45) configured for detecting actuation of the command element and supplying corresponding signals to the control elements. The circuit arrangement comprises further control and/or command elements (PSD, IS, F, LE, BC, ISC) and/or an auxiliary module (PSD).

A temperature sensor detects the presence of a flame by measuring the temperature near the flame site, and an actuator positions an ignition device in based on the temperature sensor's reading. The ignition device is positioned near the flame site if the flame is not present and further from the flame site if the flame is present.

A driving device using temperature measurement, a driving method using temperature measurement and a dual-gas-source valve control system, wherein the device includes at least two thermocouple components; and a magnetic-drive assembly, wherein each thermocouple component is connected with the magnetic-drive assembly, the thermocouple components are capable of driving the magnetic-drive assembly to generate a magnetic flux according to an external temperature, and some of the thermocouple components drive the magnetic-drive assembly to generate a magnetic flux that is capable of being offset with a magnetic flux generated by the magnetic-drive assembly driven by the other of the thermocouple components.

The invention relates to a gas control unit of modular design, in particular for controlling the quantity of gas to be fed to a gas burner, having a pneumatically controlled gas control valve that is configured as a whole as a module and is usable in such a gas control unit of modular design together with a gas safety valve.

A gas valve unit to be connected to a gas source includes a body having an inlet, a main chamber in the body communicating with the inlet and having a main outlet communicating with the outlet of the gas valve unit, a disc-shaped element in the main chamber with one or more openings putting the main chamber in communication with the main outlet hole and rotatable between a closing position, where the main outlet hole is entirely covered by the disc-shaped element, and at least two opening positions in which the one or more openings face, at least in part, the main outlet hole to enable gas passage from the main chamber to the main outlet hole via the through opening, and a control unit associated causing the snapping rotation of the disc-shaped element between the closing position and an opening position, and between the at least two opening positions.

A universally applicable regulation function is provided for a gas-operated heating device with more than one burner. The function facilitates start-up, regulation, and deactivation processes. A first valve and a second valve are connected together in a gas-tight manner. The first valve has an ignition lock which closes the main gas flow in the event of an ignition, a thermoelectric ignition fuse, a thermostat, and optionally an integrated pressure regulator. The start-up of the first valve allows the activation and deactivation of the gas flow. The first valve has two gas outlets, a first outlet for connecting the second valve, wherein the first outlet is located downstream of the ignition fuse and the optional pressure regulator and upstream of the thermostat, and a second outlet downstream of the thermostat, the second outlet leading to a first burner. The second valve is a thermostat. The first outlet of the first valve is connected to the inlet of the second valve, and the outlet of the second valve is connected to a second burner.

A cooking gas safety apparatus is shown and described. The apparatus includes a cooking gas safety valve assembly that supplies cooking gas to one or more burners. The cooking gas safety assembly includes at least one coil that is energizable to hold the valve assembly in an open position when subjected to a current that exceeds a threshold value and a hold open circuit. The hold open circuit comprises the coil and a hot surface igniter that is in electrical communication with the coil. The valve assembly is actuated by manually opening the valve and energizing the igniter such that it receives a threshold current that corresponds to an autoignition temperature of the gas. At the threshold current, an electromagnet in the cooking gas safety valve assembly holds the valve open so that it remains open without user intervention. In the event of an igniter failure, the current flow to the coil ceases, causing the valve to shut and cease gas flow to the burner. In certain examples, hold open circuit allows the igniter to operate off of alternating current while the coil receives a time-varying, direct current.

The present invention concerns an indication apparatus and corresponding method to indicate the output level of a pilot flame in a gas appliance provided with a thermocouple suitable to convert the energy generated by a pilot flame, which receives gas from a pilot valve, into electric voltage to power an electro valve of the pilot valve and to keep the latter open. The apparatus comprises a first and a second connector suitable to be coupled with a positive terminal and with a negative terminal of the thermocouple, a voltage measurement circuit connected to the first and the second connector, a lighting device configured to provide a light signal, a controller device coupled with the voltage measurement circuit and with the lighting device and configured to determine the switching on of the lighting device on the basis of the output supplied by the voltage measurement circuit to provide a user with an indication of when the voltage generated by the thermocouple is greater than or equal to a predefined value sufficient to power the electro valve.