York S1-029-21182-255 Burner Orifice #55

The York S1-029-21182-255 Burner Orifice regulates fuel flow to the burner by using a calibrated #55 outlet opening to control the amount of gas entering the combustion passage. Gas passes through the precisely sized opening before reaching the burner, establishing the flow features required by compatible heating equipment in HVAC systems. The orifice is seated at the specified burner or manifold position and remains aligned with the corresponding gas passage during operation. Controlled fuel metering maintains the designated gas flow, supports steady burner ignition, and contributes to consistent combustion during heating cycles.