The official Heidelberg naming for L8.164.1515 is “Filter cartridge.” Heidelberg’s online shop lists the exact part under that name, confirming the base part number and official terminology.
A Heidelberg-related PowderStar operating manual gives a more precise technical description: “Compressed air filter element for rotary multi-vane compressor DT4.40/K.” That makes this part suitable to describe commercially as a filter cartridge or compressed air filter element for the Heidelberg powder spray system.
For part-number verification, the documented base number is L8.164.1515. In the sources reviewed here, I did not find a reliably documented Heidelberg suffix variant for this exact number, so the safest listing keeps the base reference only.


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