Monarch 8.00GPH, 60BPS nozzle

This oil nozzle is a precision consumable part that atomises fuel oil into a fine spray for complete combustion. In the burner system it sits between the oil pump and the combustion head; the pump delivers pressurised oil to the nozzle, where it passes through an internal swirl chamber and exits as a conical mist. The shape and density of the spray are defined by the nozzle’s flow rate, spray angle, and spray pattern. For this article those parameters are given in the catalogue designation: 8.00 GPH flow rate and a 60° spray angle; the pattern is indicated by the BPS code. When selecting a replacement, all three parameters must match the burner manufacturer’s data plate. Using a nozzle of the correct flow rate but wrong pattern can cause sooting, pulsation, or unstable ignition. The nozzle thread and the reference pressure at which the flow rate is stated are additional factors to verify, though they are not specified in the present catalogue entry. As a wear item the nozzle should be replaced during every burner service interval.