What is the purpose of a gas burner's orifice?

The purpose of a gas burner's orifice is primarily to regulate the flow of gas into the burner. The orifice acts as a precise opening that allows gas to pass from the supply line into the burner at a controlled rate. This regulation is crucial for maintaining optimal burner performance, as it ensures that an appropriate amount of fuel is available for combustion. The size and design of the orifice determine the volume of gas that is permitted to flow, which impacts the burner’s efficiency and the quality of combustion it achieves.

Having the correct flow rate is essential not only for efficient energy utilization but also for safety, as improper flow could lead to hazardous conditions such as incomplete combustion or excessive emissions. While other options address important aspects of gas fitting and safety, the primary function of the orifice itself is the regulation of gas flow into the burner.