Delavan 2.75GPH, 60W (7) nozzle

This Delavan oil nozzle, catalogue article 345.892.033, is listed under manufacturer codes 00275-60W7 and 3042176. The designation 2.75GPH, 60W (7) is the standard way such nozzles are identified. Oil nozzles of this type are precision consumable parts that atomise fuel oil into a fine spray cone so that it burns completely. The nozzle sits at the end of the oil gun inside the burner’s combustion head. Together with the oil pump and solenoid valve, it determines how fuel is delivered to the flame. Selection of a replacement nozzle depends on three parameters that must all match the burner data plate: the flow rate in GPH (or kg/h) measured at the reference pressure, the spray angle (typically between 30° and 80°), and the spray pattern – hollow, solid, or semi-solid. The thread size must also be compatible with the oil gun. When replacing an oil nozzle, it is not enough to match only the flow rate. A nozzle with the correct gallonage but the wrong pattern will produce sooting, flame pulsation, or unstable ignition. Always compare the original nozzle’s stamped rating, angle, and pattern code against the burner manufacturer’s specification. The brand Delavan is one of several commonly encountered in this category; the part numbers given here correspond to this specific variant.