Delavan 0.85GPH, 45W (1) nozzle

This is an oil nozzle from Delavan, listed under the catalogue category of oil nozzles. The article is identified as a 0.85GPH, 45W (1) nozzle, with manufacturer codes P0085-45W1, 3042061, and 345.892.058. Oil nozzles are precision consumable parts that atomise fuel oil into a fine spray cone for complete combustion. They are mounted in the burner's combustion head and receive pressurised oil from the pump. The spray pattern and angle determine how the flame sits relative to the blast tube and the combustion chamber. When replacing a nozzle of this type, the selection must match the burner data plate on three parameters: flow rate (in US gallons per hour or kg/h at the reference pressure), spray angle (typically 30 to 80 degrees), and spray pattern (hollow cone, solid cone, or semi-solid cone). Using the correct rating but the wrong pattern can cause sooting, pulsation, or unstable ignition, regardless of the burner make or model. Parts of this class are single-use items – they are not cleaned or reconditioned. The thread is standard for oil nozzles, but always verify the thread size against the burner's adapter before fitting. The code "45W" in the name refers to the nominal spray angle and pattern type, but the exact meaning of the letter designation should be confirmed on the manufacturer's specification sheet or the burner data plate. No further compatibility or performance details are contained in the available data for this specific article.