Polypropylene
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Does any friend know or have experience with whether polypropylene containers can withstand negative pressure?
The setting for the breather valve of the polypropylene powder silo is then known (-0.000025–0.015 MPa). And the breather valve on the polypropylene granule silo can hardly be called a breather valve at all; it’s actually just a filter screen that remains connected to the atmosphere under normal conditions. Also, check whether there are any safety accessories for pressure vessels on the polypropylene granule silo.
Reply to 2# passpass: That means it simply can’t hold up