Boquilla Delavan 8.00GPH, 60B (7)

This is a Delavan oil nozzle, listed under the catalogue code 345.892.123 and manufacturer references 00800-60B7 and 3042252. The designation 8.00GPH, 60B (7) indicates a nominal flow rate, spray angle and pattern, although the exact meaning of the suffix is defined by the manufacturer’s coding system. Parts of this type are precision consumables that atomise fuel oil into a fine cone for complete combustion. The nozzle sits at the end of the oil pump line inside the burner’s combustion head, and it works together with the pump, solenoid valve and, where fitted, a preheater. Selection of a replacement nozzle must be based on the burner data plate. Three parameters are critical: the flow rate in GPH (or kg/h) at the reference pressure, the spray angle (typically 30 to 80 degrees), and the spray pattern (hollow, solid or semi-solid). The pattern determines how the flame sits in the combustion head. A nozzle with the correct rating but the wrong pattern can cause sooting, pulsation or unstable ignition. The thread size must also match the burner’s nozzle holder. When replacing, it is good practice to use only a genuine nozzle that matches the original specification exactly, as even small deviations affect flame shape and burner efficiency.