Delavan 6.50GPH, 45W (7) nozzle

This is a Delavan oil nozzle, catalogue reference 345.892.207, also listed under manufacturer code 00650-45W7. It belongs to the category of oil nozzles, a precision consumable component in oil burners. An oil nozzle of this type atomises the fuel into a fine spray cone so that it can mix with combustion air and burn completely. The nozzle is a wear item; its flow rate, spray angle, and spray pattern together determine how the flame sits in the combustion head. Selection of a replacement nozzle must match all three parameters to the burner data plate. Using the correct flow rate but a wrong pattern or angle can cause sooting, flame pulsation, or unstable ignition, so the burner manufacturer’s specification should be followed exactly. The nozzle threads into the oil pump or gun assembly and works with the pump solenoid and preheater (if fitted) to deliver pressurised fuel at the moment of ignition. When replacing a nozzle, check the GPH rating and the spray angle and pattern markings on the original part. Even a small deviation can affect combustion quality and may lead to lockout or excessive carbon buildup. No additional properties or compatibilities are stated beyond the name and codes provided.