Ugello Delavan 1.35GPH, 60W (1)

This is a Delavan oil nozzle rated 1.35 GPH at 60 W (reference pressure, likely 100 psi / 7 bar, though the pressure is not stated for this article). The part is listed under catalogue article 345.892.027 and carries manufacturer codes P0135-60W1, 3042090, and 345.892.027. As with all oil nozzles of this type, it is a precision consumable that atomises fuel oil into a fine spray cone, enabling complete combustion in the burner head. The nozzle sits at the end of the oil gun, immediately after the pump and solenoid valve, and its spray characteristics directly determine flame shape and stability. For any replacement, a nozzle of this class must be selected by three parameters: flow rate (given here as 1.35 GPH), spray angle (typically between 30° and 80°) and spray pattern (hollow, solid, or semi‑solid). The angle and pattern are not stated for this specific article, so they must be obtained from the burner’s data plate or the original part. Using the correct flow rate but a mismatched pattern can cause sooting, pulsation, or unstable ignition. The thread type (usually 1/8″ BSPT or NPT depending on market) should also be verified against the burner oil gun. When replacing a nozzle of this type, always check the burner’s combustion readings afterwards – CO₂ or O₂, smoke number, and flame shape – to confirm that the new nozzle works correctly with the combustion head and air settings.