hp-Technik 12 / 19 acoplamiento 0820667

The article listed is the hp-Technik coupling 12/19, catalogue number 543.505.003, manufacturer codes 0820667 and 84139100. It belongs to the category of oil filters, coils, tubes and hoses. Couplings of this type are used to connect oil supply lines within the fuel train of a burner. They join sections of tubing between the tank, filter, pump, and nozzle assembly, allowing for a secure, leak-free union that can be disassembled for service. Selection of such a coupling is based on the tube outer diameter (the "12/19" designation likely refers to two sizes, but the exact dimensions should be verified against the existing installation), the thread type (if it uses a threaded connection), and the material compatibility with the fuel oil. When replacing a coupling, check that the sealing faces are clean and that the compression ring or O‑ring is in good condition to avoid air ingress or oil leaks, which can cause erratic burner operation or safety shutdowns.