What occurs when a gas burner experiences overpressurization?

When a gas burner experiences overpressurization, the phenomenon that occurs is termed as "flame lifting." This happens because an excessive amount of gas is being delivered to the burner, which can disrupt the combustion process. When the pressure of the gas supply exceeds the normal operating range, it causes the gas to flow more rapidly than intended, resulting in a flame that cannot properly stabilize at the burner head.

In a properly functioning burner, the gas and air mixture is balanced, allowing for consistent combustion and a stable flame. However, with increased pressure, the flame tends to lift off the burner surface, indicating that it is no longer properly anchored where it should be. This can lead to unsafe operating conditions and can be a precursor to further complications, such as the risk of flashbacks or inefficient combustion.

Other potential outcomes, such as the flame extinguishing or stabilizing, are not indicative of overpressurization but rather suggest issues related to other factors, such as fuel supply or air mixture changes. Understanding the dynamics of flame behavior under varying pressures is crucial for safe and efficient burner operation in gas systems.