Delavan Oil nozzle 30609-004

The Delavan Oil nozzle 30609-004 is an oil nozzle designed for atomizing fuel oil into a fine cone for complete combustion within the burner head. It is a precision consumable component that directly influences flame shape, combustion quality, and burner stability. This nozzle is selected based on flow rate, spray angle, spray pattern, and thread type, which must match the burner data plate. It is a replacement part for superseded numbers 20210043 and 1088010111.

Parts of this type are selected by flow rate (in gph or kg/h at a reference pressure), spray angle (typically 30-80 degrees), spray pattern (hollow, solid, or semi-solid), and thread type. All three parameters must match the burner data plate. When replacing, handle the nozzle with clean tools, avoid touching the orifice, and use the torque specified by the burner manufacturer to prevent damage.

Using a wrong flow rate, spray angle, or pattern can cause sooting, pulsation, or unstable ignition. Over-tightening can damage the seat, leading to fuel leaks or improper atomization. Check the nozzle for clogging or wear if the burner exhibits poor combustion or instability.