Description
The York S1-9951-0891 Gas Orifice 43 is a metering component used in gas-fired heating equipment to regulate the flow of fuel entering the burner assembly. The calibrated opening size ensures controlled gas delivery to the combustion chamber, supporting consistent flame features during operation within HVAC systems. It is installed within the furnace burner manifold in compatible heating systems used in residential and light commercial conditions. The orifice assists in maintaining correct combustion balance by aligning gas input with system requirements, allowing stable heat generation and proper burner operation within the system.
