Delavan 22.00GPH, 80BPS VariFlo nozzle

This article is an oil nozzle from Delavan, designated 22.00GPH, 80BPS VariFlo, with catalogue code 345.892.042 and manufacturer codes 33769-089 and 345.892.042. It belongs to the category of oil nozzles, which are precision consumable components in oil-fired burners. An oil nozzle atomises fuel into a fine spray cone so that combustion can occur completely and stably. It is fitted at the end of the blast tube in the combustion head, directly downstream of the oil pump and the solenoid valve. The nozzle is a replaceable wear item; its condition directly affects flame shape and combustion efficiency. Parts of this type are selected by three parameters: flow rate (in GPH or kg/h at a reference pressure), spray angle (typically between 30° and 80°), and spray pattern (hollow, solid, or semi-solid). The thread size must also match the burner assembly. A nozzle with the correct flow rate but the wrong pattern can lead to sooting, pulsation, or unstable ignition. When replacing, all three parameters must match the burner data plate exactly. The burner data plate or the original manufacturer’s specification is the only reliable source for the correct nozzle choice.