Delavan 4.50GPH, 90B (7) nozzle

The Delavan 4.50GPH, 90B (7) nozzle is an oil nozzle listed under catalogue article 345.892.050 and manufacturer code 00450-90B7. It belongs to the oil nozzles category. Nozzles of this type atomise fuel oil into a fine spray cone to enable complete combustion. They are precision, consumable parts — the flow rate, spray angle and spray pattern together determine how the flame sits in the combustion head. Selection depends on three parameters: flow rate (in GPH or kg/h at the reference pressure), spray angle (typically 30 to 80 degrees), and spray pattern (hollow cone, solid cone or semi-solid). The thread size must also match the burner. A nozzle with the correct flow rate but wrong pattern or angle can cause sooting, pulsation or unstable ignition. When replacing, always verify that all three parameters match the burner data plate. No additional performance or compatibility claims are made for this specific article beyond the identifiers provided.