Delavan 0.60GPH, 70W (1) nozzle

This is a Delavan oil nozzle, catalogue article 345.892.004, also listed as P0060-70W1. It belongs to the oil nozzle group in the catalogue under the Delavan brand. The product data provides the part numbers and the basic rating information as stated in the name. Oil nozzles of this type are precision consumable components that atomise fuel oil into a fine spray cone, enabling complete combustion in the burner head. The flow rate, spray angle, and spray pattern together determine how the flame sits relative to the combustion head and blast tube. For any oil burner, selecting a nozzle requires matching three parameters: the flow rate (given in US gallons per hour at the reference pressure, typically 100 psi or 7 bar), the spray angle (commonly between 30° and 80°), and the spray pattern (hollow cone, solid cone, or semi-solid). Using a nozzle with the correct gallonage but a wrong pattern can lead to sooting, flame pulsation, or unstable ignition. Therefore a replacement nozzle must exactly match the specifications on the burner data plate. When replacing such a nozzle, note that the thread size is standard for most domestic and light commercial oil burners. The nozzle is a consumable part and should be replaced annually or whenever combustion checks indicate deterioration. Always handle the nozzle with clean hands and tools to avoid blocking the precision orifice. Do not attempt to clean a blocked nozzle; replace it. The rating stamped on the nozzle refers to a reference pressure; if the burner pump pressure differs, the actual flow will change accordingly.