Delavan 1/4 standard nozzle adapter

This Delavan 1/4 standard nozzle adapter is a fitting used in oil burners to mount the oil nozzle to the burner’s oil supply line. In an oil burner system, the nozzle atomises fuel into a fine spray for combustion, and the adapter provides a secure, leak‑free connection between the nozzle and the oil pump or nozzle holder. Parts of this type are selected by thread size – in this case a 1/4 inch thread – and by the form of the seal (cone or flat seat). When replacing an adapter, check that the thread pitch and sealing face match the existing nozzle and the burner’s oil line. An adapter with the correct thread but wrong seal type can cause leaks or misalignment, leading to poor spray pattern or unstable ignition. Also ensure that the adapter is clean and free from burrs or debris, as any contamination can clog the nozzle’s internal filter and affect atomisation. This nozzle adapter is a precision component; even minor damage can alter the nozzle’s seating and change the spray angle. For correct operation, always use a new adapter when the nozzle is replaced, and tighten it to the manufacturer’s torque specification – over‑tightening can distort the nozzle body, while under‑tightening can cause fuel leakage. The Delavan brand is known in the oil heating industry, and this standard 1/4 adapter is a common replacement part. No special tools are required beyond standard wrenches, but care must be taken not to cross‑thread the connection.