De Dietrich Pilotbrenner-Düse 0.4mm, 200006191

This is a De Dietrich pilot torch nozzle with an orifice diameter of 0.4 mm. The part belongs to the gas nozzles and injectors category and carries the manufacturer codes 200006191 and 336.736.005. The genuine De Dietrich marking confirms it is intended for use in De Dietrich burners and boilers, although no specific appliance models are listed here. A pilot torch nozzle meters the gas flow to the pilot burner, which provides the flame that ignites the main burner during the start-up sequence. The orifice diameter (0.4 mm) determines the gas throughput and, together with the gas pressure, defines the pilot flame size and stability. When replacing such a nozzle, the critical selection parameter is the orifice size, which must match the burner’s design and the gas type. The nozzle’s thread type and sealing method should also be verified against the old part. A worn or blocked nozzle can cause a weak or unstable pilot flame, leading to ignition failures or lockouts.