What kind of pipe fitting is this?
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There’s a wedge-shaped object inside, and it seems there’s something that tapers off; I didn’t understand it.
Could you send another panoramic image? It would help to see what the overall appearance is, which would facilitate discussion.
This is the sound generator of the vortex flow meter
A triangular prism that looks like a vortex flow meter
For something like a vortex street measuring tube, without an overall image, it’s impossible to determine
I also see him as a check valve. This can’t be a riddle.