Delavan Oil nozzle 00350-90B7

The Delavan Oil nozzle 00350-90B7 is a precision consumable part used in oil-fired burners. It has a capacity of 3.5 gallons per hour and a spray angle of 90 degrees, with a spray pattern of type B. This nozzle atomizes fuel oil into a fine spray for complete combustion and is installed in the combustion head. It is suitable for applications in boilers, furnaces, and automobile engines. The nozzle should be replaced at regular service intervals to maintain clean combustion.

Parts of this type are selected by three parameters: flow rate (in US gallons per hour at a reference pressure), spray angle (typically between 30 and 80 degrees), and spray pattern (hollow, solid, or semi-solid cone). All three must match the burner manufacturer's specification on the data plate. When replacing a nozzle of this class, verify the exact rating, angle, and pattern of the original part, and ensure the thread size (standard 1/8" BSP or NPT on most domestic oil nozzles) is compatible with the burner's nozzle adapter.

A nozzle with the correct flow rate but the wrong angle or pattern can cause sooting, pulsation, unstable ignition, or flame impingement. Using a part with wrong parameters can lead to lockout or inefficient operation. During commissioning or troubleshooting, check that the nozzle is clean, correctly seated, and free of carbon deposits.