this factory-spec assembly provides the exact oven burner rack configuration required for safe and reliable ignition cycles

reducing the need for multiple specialized modules

With a 5 Cv flow factor and a required operating pressure differential of 5-125 PSI

allowing for efficient field replacement and reduced downtime

York S1-9951-1801 Orifice 320788-704 this factory-spec assembly provides theThe York S1 9951 1801 Orifice is a precision engineered fixed bore metering device designed for specific residential and light commercial HVAC applications. Featuring a . 180" orifice size (Sz15), this component is critical for maintaining accurate refrigerant flow control within the evaporator coil. As a genuine OEM replacement part, it ensures proper pressure drops across the liquid line, optimizing heat exchange efficiency in York, Coleman, and