Delavan Delavan nozzle adapter 17147

The Delavan nozzle adapter 17147 (type designation DLN 17147) is a fitting used in oil burner systems to connect the fuel line to the nozzle. It is designed for use with Delavan SNA and DA series nozzles, ensuring proper alignment and a leak-tight mount. The adapter has a 1/4 NPTF connection for the air inlet and a 1/8 NPTF connection for the fuel inlet. It is manufactured by Delavan and falls under the category of oil filters.

When selecting a nozzle adapter of this kind, verify that the thread sizes on both the fuel line and the nozzle match the adapter's connections. Check the overall length and hex size to ensure clearance in the burner housing. If the adapter includes an internal filter or restrictor, confirm that the flow diameter is compatible with the burner's firing rate. Always compare the thread of the existing adapter with the new one before installation.

A worn or cross-threaded adapter can cause fuel leakage, air ingress, or a poor spray pattern. Symptoms may include visible fuel drips, uneven flame, or difficulty igniting. Inspect the threads and sealing face for damage or debris during replacement.