100mm duct butterfly valve

NOT ORIGINAL CONTENT. Support author and more info : https://www.**********.com/model/137799-100mm-4-butterfly-throttle-valve-type-non-clog-bla

Summary :

In addition to printing filament you'll need 4 short M5 bolts of some kind

and 4 short socket head M3 x 6mm and 1 socket head M3 x 10mm or

12mm bolts. The M5 bolts should self-tap their own threads into the holes

printed into the Tube_1 frame, or, as I did, you could use an M5 tap (or any

other thread size that fits the hole). Likewise for the M3 bolts. The longer

M3 bolt is used to hold the lever on the butterfly shaft. The holes may

need to be eased with a suitable drill bit.

The lever has an arrow-like shape at it's tip, which shows which direction

to rotate it to open the gate.

You need to print 2 tubes, the 2 halves of the butterfly (Butterfly_1 and

Butterfly_2) and 1 lever for each gate.