Servo gas system, gas burner and method for operating the gas burner

Servo gas system for a gas burner, namely for controlling a pressure regulation valve positioned in a gas duct of the gas burner, thereby controlling a gas pressure within the gas duct being present downstream of the pressure regulation valve and thereby controlling a pressure difference between a pressure in a burner chamber of the gas burner and said gas pressure within the gas duct, the servo gas system comprising:

• a static servo gas flow branch and a dynamic servo gas flow branch being connected in parallel,
• a flow sensing element being connected between the static servo gas flow branch and the dynamic servo gas flow branch and providing a signal used to control the pressure regulation valve by an electric actuator.

A method for controlling a gas pressure in a gas duct of a gas burner via a pressure regulation valve positioned in the gas duct, wherein the gas burner includes a static servo gas flow branch and a dynamic servo gas flow branch situated in a parallel arrangement between the gas duct downstream of the pressure regulation valve and the gas burner, wherein the dynamic servo gas flow branch includes a pneumatic pressure regulator and wherein a flow sensor is connected between the static servo gas flow branch and the dynamic servo gas flow branch downstream of the pneumatic pressure regulator, the method comprising:

• receiving a signal from the flow sensing element, the signal indicative of a flow between the static servo gas flow branch and the dynamic servo gas flow branch downstream of the pneumatic pressure regulator;
• and
• adjusting the pressure regulation valve based on the signal received from the flow sensing element.