Delavan 1/4 standard nozzle adapter 28737-003

The 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. It provides a secure, leak-free connection between the nozzle and the oil pump or nozzle holder. This adapter has a 1/4 inch thread and is available with a cone or flat seat seal type. It is a precision component that requires installation according to the manufacturer's torque specification.

Parts of this type are selected by thread size and seal type (cone or flat seat). Before ordering, check that the thread pitch and sealing face match the existing nozzle and the burner's oil line. Ensure the adapter is clean and free from burrs or debris. Use standard wrenches and tighten to the manufacturer's torque specification.

Over-tightening can distort the nozzle body, while under-tightening can cause fuel leakage. An adapter with the correct thread but wrong seal type can cause leaks or misalignment, leading to poor spray pattern or unstable ignition. Contamination can clog the nozzle's internal filter and affect atomisation.