Boquilla Delavan 3.00GPH, 90B (7)

This Delavan oil nozzle, catalogue article 345.892.045, manufacturer code 00300-90B7, is a precision component that atomises fuel oil into a fine spray cone for complete combustion in an oil burner. Parts of this type are consumable items; their condition directly affects flame shape, ignition stability and soot formation. The nozzle sits between the oil pump and the combustion head, receiving pressurised fuel and delivering a metered, atomised mist into the air stream. Selecting a replacement nozzle requires matching three parameters: flow rate (in USGPH or kg/h at the reference pressure), spray angle (typically 30 to 80 degrees), and spray pattern (hollow, solid or semi-solid). Using a nozzle with the correct flow and angle but the wrong pattern can cause pulsation, delayed ignition or excessive soot. The thread type must also match the burner’s nozzle holder. No further specification for this particular article is available beyond the data shown; always verify the rating, angle and pattern against the burner data plate before fitting.