Monarch-9.00GPH- und 80PLP-Düse

This article is an oil nozzle from Monarch, catalogue reference 732.892.131, manufacturer code 9.00GPH,80PLP. It belongs to the category of oil nozzles, which are precision consumable components in oil-fired burners. An oil nozzle atomises the fuel into a fine spray cone so that it mixes with combustion air and burns completely. It is a wear part that must be replaced periodically. The nozzle sits at the end of the oil line inside the combustion head, receiving pressurised oil from the pump. Together with the pump, solenoid valve and preheater (if fitted), it forms the oil delivery and atomisation subsystem. For any oil nozzle, three parameters define the flame shape and stability: the flow rate (in GPH or kg/h at the reference pressure), the spray angle (typically between 30 and 80 degrees), and the spray pattern (hollow, solid or semi-solid). The thread size must also match the burner adapter. All three parameters must match the burner data plate exactly. Using a nozzle with the correct flow rate but the wrong pattern can cause sooting, pulsation or unstable ignition. Conversely, a nozzle with the wrong angle or flow rate will produce a flame that does not fit the combustion head, leading to poor combustion or carbon build-up. When replacing, always verify the existing nozzle markings or consult the burner manual to confirm the correct specification.