Stable combustion burner "What does that mean?

Efficiency of the boiler rated load / boiler / burner environmental correction coefficient determines the power of choice of the gas burner. Power agas Burner Valves range is a gas valvemodel set later, after certain allowable gas pressure, corresponds to a flow rate range, and the greater the gas pressure, the greater the flow. Visible: the burner can be equipped with different valve, with a valve flow at different gas pressures also different boiler rated load, environmental and boiler efficiency decisions burner power, gas flow decided burner power. Set the gas flow in gas pressure determined, you can select the appropriate gas valve, the gas valve at the gas pressure must be covered and larger than the traffic. "Gas train gas mass flow should enable the boiler operation at rated load, stable combustion burner," what it means.