Ugello Steinen 0.50GPH, 60ST

An oil nozzle of this type atomises fuel oil into a fine, cone-shaped spray so that it burns completely within the combustion head. It is a precision consumable: the flow rate, spray angle and spray pattern together determine how the flame sits relative to the blast tube and heat exchanger. A nozzle with the correct flow rate but the wrong pattern or angle can cause sooting, pulsation, or unstable ignition, so all three parameters must match the burner data plate. Selection is based on the flow rate in GPH (or kg/h) at the reference pressure, the spray angle (typically 30–80 degrees), the pattern (hollow, solid or semi-solid), and the thread size. The nozzle is fitted into the oil gun and works together with the oil pump, solenoid valve and – on heavy-oil installations – a preheater. During the burner start sequence, the burner control energises the pump solenoid; pressurised oil then passes through the nozzle, where it is atomised and ignited. This article is a Steinen oil nozzle with a rated flow of 0.50 GPH and the designation 60ST (catalogue article 908.892.054, manufacturer code 0.50GPH,60ST, 908.892.054). When replacing a nozzle of this type, always check that the GPH rating matches the burner output and that the angle and pattern – indicated by the manufacturer’s code – are identical to the original part. Nozzles are single-use service items; install a new nozzle during every annual burner service.