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.

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.

Valvular control circuit (10) comprising a first valve element (12) coupled with a manual drive member (20) to generate a pilot light (21), a second valve element (14) coupled with a second valve switch (15), a control and command unit (16) coupled with a DC/DC electric voltage converter (17) and able to command said second valve switch (15) by means of a command signal, wherein said valvular control circuit (10) comprises a first thermoelectric power source (22) coupled with the DC/DC electric voltage converter (17), and a second thermoelectric power source (23) coupled with at least one of either the first valve element (12) or the second valve element (14), said thermoelectric power sources (22, 23) both being fed by a pilot light (21).

Gas safety valve that includes a body having an inlet conduit and an outlet conduit. The body includes a housing in which a magnetic group is at least partially disposed. The magnetic group configured to regulate the opening or closing of a gas passage between the inlet conduit to the outlet conduit. The magnetic group includes an electromagnet, a support of the electromagnet and a bushing coupled to the support. The safety valve includes fixing means for fixing the bushing and the magnetic group to the body. The fixing means includes a fixing element having a cylindrical central part the free end of which is adapted to the geometry of the body retaining the fixing element against the body, and a flange extending radially towards the inside and retaining the bushing against the support.

A gas valve unit for controlling a gas throughput guided to a gas burner of a gas device includes a plurality of on-off valves. Each on-off valve includes a movable valve body with a shut-off body and an activation area, a closing spring which, when the on-off valve is closed, pushes the shut-off body onto a sealing seat and thereby closes an opening. A driver lifts the shut-off body away from the sealing seat for opening the on-off valve by a force caused by the driver when engaging into the activation area against a force of the closing spring. The valve body has a shoulder area to accept a torque arising on engagement of the driver into the activation area.

The present invention relates to a gas burner system (10) for a gas cooking hob, in particular for a domestic gas cooking hob. Said gas burner system (10) comprises a gas burner assembly (12) including a plurality of flame ports. At least one pot support (14) is arranged above and/or around the gas burner assembly (12) and defining a distance between said gas burner assembly (12) and a bottom of a cooking pot. At least one supply air fan (16) is provided for generating an air flow (24) to the gas burner assembly (12). A gas inlet (38) is connectable or connected to a gas supply. A gas regulator (18; 30; 36; 38) is provided for regulating a gas flow from the gas inlet (38) to the gas burner assembly (12). A control unit (20) is provided for controlling the supply air fan (16) and the gas regulator (18; 30; 36; 38). At least one thermocouple (22) is provided for detecting flames above the gas burner assembly (12) and for providing a flame signal (28) to the control unit (20).

A flame ignition and control system includes at least one gas burner, which is connected to a gas source via a flame control system, and a safety valve controlled by a flame sensor consisting of a thermocouple. The safety valve has an open state, in which the source supplies gas to the burner, and a closed state, in which gas flow is obstructed, the switching from the open state to the closed state and vice versa being controlled by the electric signal generated by the thermocouple. An igniter device is provided, which consists of an ignition electrode and a power supply unit thereof. Furthermore, at least the operation of the igniter device is controlled according to the current strength of the electric signal generated by the thermocouple.

The object of the present invention is hence an electro-actuator (1) for gas cooktops or the like, piloted by actuating means, comprising at least one safety electromagnet (4) forming part of a pilotstat, at least one cut-off means (2) of the fuel gas, substantially a sleeve provided with an outlet channel (22) and a conduit (23) of the fuel gas, of at least one safety shutter (20) whereon a pushing/pulling force (F.sub.F) acts that operates the safety closing of said outlet channel (22), at least a service shutter (20), and a support structure (10) provided with a cavity (100) within which a stem (21) is placed sliding, whereto at least one ferromagnetic element (32) cooperating with said safety electromagnet (4) and said shutter (20) cooperating with the cut-off means (2) of the fuel gas are constrained, where said safety shutter (20) and said service shutter (20) coincide in a same shutter (20); said ferromagnetic element (32) being anchored to said safety electromagnet (4) through an anchoring force (F.sub.P) of mutual attraction that arises when said safety electromagnet (4) is electrically powered, in particular through the flame sensor of pilotstat,

characterised in that:
said pressing/pulling force (F.sub.F) is of magnetic nature and susceptible to be won by the command forces (F.sub.S) exerted for the opening of said outlet channel (22) and by said anchoring force (F.sub.P).

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 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.