Delavan Oil nozzle 00125-60W1

The Delavan oil nozzle 00125-60W1 is a precision consumable component that atomizes fuel oil into a fine spray for complete combustion. It has a capacity of 1.25 gallons per hour (GPH) and a spray angle of 60 degrees. The nozzle is of the W type, described as 'all purpose', meaning it is neither truly hollow nor solid and can often replace either type. It is installed in the combustion head and works with the oil pump, solenoid valve, and preheater. This nozzle is suitable for fuel oil and is part of a compatibility range from 0.40 to 8.00 GPH.

When selecting a replacement nozzle of this kind, three parameters must exactly match the burner data plate: flow rate (GPH), spray angle, and spray pattern (hollow, solid, or semi-solid). The thread type is also fixed by the burner design. For W type nozzles, they can frequently be used in place of either solid or hollow cone nozzles within the compatibility range, but the lower flow rates tend to be more hollow. Always confirm the manufacturer code matches the original part before fitting.

A worn or incorrectly selected nozzle can cause poor atomisation, pulsation, or delayed ignition. Combustion symptoms such as sooting or unstable ignition may appear, and the nozzle may affect flame proving, potentially leading to lockout. Regular replacement during routine burner servicing is recommended to avoid these issues.