According to one embodiment a gas tap is provided that includes a manually operable shaft having a first end coupled to a regulating element and a second end configured to be coupled to a knob that can be operated by a user. The shaft includes a first locking element, and the gas tap includes a second locking element. The shaft is rotational between an initial angular position and a final angular position, and is axially movable when it is arranged in the initial angular position between a first axial position in which the first locking element and the second locking element cooperate with one another, preventing the shaft from being able to rotate, and a second axial position in which the shaft is able to rotate. The user has to pull on the shaft in order to move it from the first axial position to the second axial position.

A gas valve unit for setting a gas volumetric flow to a twin-circuit gas burner of a gas appliance includes a valve body having a gas inlet and two gas outlets, and a control mechanism for adjusting the gas volumetric flow to at least one of the gas outlets in a multiple-stage manner. The control mechanism has a zero position in which the gas volumetric flow to the gas outlets is interrupted, and a switching position which is adjacent to the zero position and in which the gas volumetric flow is set to a maximum value.

A shut-off valve that has a closure orifice, a closure member to open and close a gas passage through the shut-off valve, an electromagnetic actuator including a movable assembly attached to the closure member, the closure member, and an electromagnetic filed generator magnetically associated with the movable assembly. The shut-off valve also includes a manual actuator for acting on the movable assembly, the manual actuator comprising an open position in which it is decoupled from the movable assembly, the electromagnetic actuator thus being able to act on the closure member to cause its closure.

A control valve may include a fluid inlet, a plurality of fluid outlets, and a plurality of magnets. One of the plurality of magnets controls fluid flow for each of one of the plurality of fluid outlets. One of the plurality of magnets controls fluid flow for the remaining of the plurality of magnets. When the magnet controlling fluid flow for the remaining of the plurality of magnets is energized, fluid flow is permitted to the remaining of the plurality of magnets. When the remaining of the plurality of magnets are energized, fluid flow is permitted to the respective plurality of fluid outlets.

A control gas ball valve for high pressure gas cooking appliances provides a linear surface slot along its rotation direction. When turned by a control knob and enters a gas inlet, the said surface slot is able to channel gas input to a hole that connects said surface slot to the center of the valve ball. The gas in the center of the valve ball is directed away to a burner for cooking purposes. The said linear surface slot is able to provide constant flowrate slope for continuously variable power adjustment and a maximum power plateau. These are the most desirable features in residential cooking.

A switching assembly of a gas stove includes a regulating valve, a knob, a stop board, and a restricting device. The regulating valve has a valve member and a regulating member, which is rotatable to regulate a gas flow through the valve member. The knob is connected to an end of a shaft which is connected to the regulating member with an opposite end thereof, and therefore the regulating member can be rotated by turning the knob. The stop board is located between the valve member and the knob, wherein the stop board has a curved slot, which has a first stop portion and a second stop portion. The restricting member is movable in the curved slot and is restricted by the first or the second stop portions. When the restricting member touches the first stop portion, the switching assembly allows larger gas flow to flow through.

According to one implementation a gas safety valve is provided that includes a reel onto which a coil is wound, the coil including a phase wire and a grounding wire. The reel has an elongated projection having first and second electrical contact areas onto which the phase wire and grounding wire are respectively arranged. The gas safety valve further includes an electromagnet having a core that is at least partially housed in an internal cavity of the reel. The safety gas valve also includes a support and a phase connector. The first electrical contact area is arranged such that it is inserted in the phase connector and the second electrical contact area is arranged such that it is inserted in the support, both electrical contact areas exerting an elastic force against the phase connector and the support, respectively, assuring the electrical connection between the phase wire and the phase connector, and between the grounding wire and the support, respectively.

A self-regenerative combustion system comprising a single burner, capable of operating both during the combustion step and the waste gas aspiration step, and a valve with four ways and three positions, capable of switching the regeneration and the on/off control (oxydizing agent end and waste gas end). The system is provided for obtaining the maximum efficiency, flexibility, minimum fuel consumption and minimum environmental impact with reduced NOx emissions.

A gas cock that according to some embodiments includes an electromagnetic actuator having an electrically conductive static element and an electrically conductive moving element. The gas cock has a closure element that is attached to and moves with the moving element. The gas cock has an actuator shaft that in a first position does not contact the moving element, and in a second position pushes against the moving element to cause the moving element to make contact with the static element. The static element is electrically coupled to a signal line. When the actuator shaft is in the second position the closure element is positioned to permit gas flow through the gas cock and the actuator shaft is electrically coupled with the signal line.

A burner apparatus and process are described. The burner apparatus includes an inlet chamber in communication with a combustion chamber. A primary conduit delivers fuel gas to the combustion chamber. Each of a plurality of primary tips is located in the throat of the burner tile. Each of a plurality of cavities is disposed on a downstream wall of the burner tile and stabilize the flame. The primary tips have an end port and a lateral port. A secondary conduit provides fuel gas to a plurality of secondary tips. In a passive control mode, the fuel gas to the primary tips and secondary tips is a mixed gas comprising flue gas and fuel gas. In an active mode, valves are provided to proportion the amount of fuel gas fed to the primary tips and the amount of flue gas provided to the secondary tips.