Description
The Modine 5H54751-25 Natural Gas Main Orifice is a structural component used in gas-fired unit heaters to regulate the flow of gas to the burner assembly. It is installed at the gas valve outlet or burner manifold. where it controls fuel delivery during ignition and steady-state heating operation in HVAC systems. The orifice is maintaining proper combustion parts by ensuring the correct gas-to-air ratio within the heating chamber. It is used in residential and commercial heating equipment to support consistent burner performance and safe system operation during heating cycles.
