Nordyne 663699 Burner Spud

Nordyne 663699 Burner Spud is a gas flow component that is meant to control the amount of fuel that passes into the burner assembly. It operates by metering gas as it flows through the precision orifice forming a controlled flow of fuel that combines with combustion air during operation in gas furnace HVAC systems. The spud is fitted in the burner manifold where it screws in the gas distribution port and aligns with the burner inlet. The flow of metered gas through the orifice aids in achieving the correct mixing of air and fuel, assists in ensuring that the burner flame properties remain constant, and aids in ensuring that furnace heating operation remains stable.