Buse Steinen 2.75GPH, 60S

This article is a Steinen oil nozzle, a precision component that atomises fuel oil into a fine spray for complete combustion. The nozzle sits at the end of the oil gun, directly upstream of the combustion head, and receives pressurised oil from the pump. Parts of this type are consumable and must be replaced at regular intervals or when the burner shows signs of poor combustion. Selection of such a nozzle is based on three interdependent parameters: flow rate (given here as 2.75 GPH), spray angle, and spray pattern. The flow rate is the quantity of oil delivered at the reference pressure; the angle determines how widely the spray cone spreads; and the pattern (hollow, solid, or semi-solid) governs how the oil droplets are distributed within that cone. All three must match the burner manufacturer’s specification. A nozzle with the correct flow but the wrong pattern or angle can cause sooting, pulsating flame, or unstable ignition. The designation 60S on this nozzle indicates its spray angle and pattern, though the exact meaning should be verified against the burner data plate. When replacing a nozzle of this type, always confirm the flow rate, angle, and pattern, and ensure the thread size matches the oil gun. Because the nozzle is a precision part, even minor deviations from the original specification can affect flame shape and efficiency.