NFPA 660 8 ft³ Rule
If the dirty-side volume of an air-material separator is greater than 8 cubic feet, the enclosure should be protected against the effects of an explosion.
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If the dirty-side volume of an air-material separator is greater than 8 cubic feet, the enclosure should be protected against the effects of an explosion.
A Guide to NFPA 660 Standards for HAZLOC and ORDLOC Dust Collection and Vacuuming
Compact 120V Electric Vacuums for explosive powders in food production.