DEVICE FOR CONTROLLING THE SUPPLY OF FUEL GAS TO A BURNER , IN PARTICULAR FOR WATER HEATER APPLIANCES

A device for controlling a gas supply to a burner includes a main duct, which is provided with at least one main valve including a valve seat and associated shutter with a control for opening the seat in opposition to a resilient recall member. A pilot duct leads from the main duct to supply a pilot burner, the main duct includes a magnetic thermoelectric safety unit which is manually or automatically armed, acting on the pilot duct to enable gas to flow to the pilot burner when armed. The pilot duct includes a pressure regulator having a shutter with a membrane control, the membrane subject to pressure regulated by the regulator and to a calibration pressure determined in a calibration chamber of the regulator. The device includes a fluid connector between the calibration chamber and the main valve to provide a pressure signal correlated with the gas supply pressure.