NO delivery device with emergency dosing system

A nitrogen oxide (NO) delivery device for supplying an NO-containing gas, comprising:

• an injection line for conveying the NO-containing gas,
• a valve device arranged on the injection line for controlling circulation of the NO-containing gas in the injection line, said valve device being configured to be normally in a closed position for preventing any circulation of gas in the injection line,
• a flow rate measurement device arranged on the injection line for performing one or more measurements of a flow rate of the NO-containing gas circulating in the injection line,
• an emergency line fluidically connected to the injection line upstream and downstream of the valve device, said emergency line comprising an emergency solenoid valve configured to be normally in an open position for allowing circulation of gas in the emergency line, and a flow rate control device, and
• operating means configured to cooperate with the emergency solenoid valve, the flow rate control device, the valve device and the flow rate measurement device,
• wherein, in an event of a malfunction causing shut-down of all cooperation with the operating means:
• the emergency solenoid valve is configured to pass to an open position for allowing circulation of gas in the emergency line,
• the valve device is configured to pass to a closed position in order to stop all circulation of gas in the injection line, and
• the flow rate control device is configured to supply the NO-containing gas at a pre-fixed emergency flow rate of gas,
• wherein said emergency flow rate of gas:
• is determined by the operating means based on at least one gas flow rate measurement supplied by the flow rate measurement device, during normal functioning of the NO delivery device prior to said malfunction, and
• is pre-regulated through command of said flow rate control device by the operating means, during said normal functioning of the NO delivery device.