Butterfly 120 mm 80 mm Manual Valve
thingiverse
To build this duct valve, you need: M2.5 x 6 screws to connect the two parts of the valve with the main shaft. Use an M3xX screw or a screwed rod inside the main shaft to secure it in place and increase its strength. The joints with the fan require 4.5mm holes. On March 12, 2020, a modification was added: an 80mm variation of the same lever and screws was introduced. As expected, the lever mechanism functions well, but requires more strength to manage high air flows effectively. Further work is in progress. A high-performance shaft for the main body was developed on April 4, 2020.
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