Description
The York S1-9951-1281 Natural Gas Orifice 30 PSI is a precision fuel-metering component used in gas heating equipment such as furnaces and rooftop unit heaters. It operates by regulating natural gas flow through a calibrated 0.1285″ opening ensuring the correct pressure and air ratio for stable combustion. It is installed directly into the burner manifold in HVAC systems where it controls gas delivery into the combustion assembly. In operation, it supports consistent flame features, improves combustion efficiency, and ensures secure heating performance by maintaining accurate gas supply during each ignition cycle.
