Monarch 6.50GPH, boquilla 60BPS

The oil nozzle is a precision consumable component that atomises fuel oil into a fine spray cone, enabling complete combustion. It is mounted in the combustion head and receives pressurised oil from the pump via the solenoid valve. For a burner to operate cleanly and reliably, the nozzle’s flow rate, spray angle and spray pattern must match the burner data plate – a mismatch leads to sooting, pulsation or unstable ignition. Flow rate is expressed in US gallons per hour (GPH) at the test pressure, spray angle typically ranges from 30° to 80°, and pattern is described as hollow, solid or semi-solid. The thread is standard for the burner type. This article is a Monarch nozzle designated 6.50GPH, 60BPS. The code indicates a flow rating of 6.50 GPH, a spray angle of 60° and a BPS pattern. When replacing a nozzle, confirm that all three parameters (flow, angle, pattern) match the original specification – do not rely on part number alone. The nozzle is a consumable item; replace it at the interval recommended by the burner manufacturer or whenever service history shows drift in combustion readings.