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Explosion-proof conveyors for combustible dusts

| By Gerald Ondrey

The VS pneumatic vacuum-conveying system (photo) features an explosion-proof design that will aid in compliance with the NFPA 660 Standard for Combustible Dusts and Particulate Solids, which aims to consolidate NFPA 61, 484, 652, 654, 655 and 664 into a single standard. Eliminating electrostatic charges as a potential ignition source, the vacuum conveyors automatically transfer ignitable powders in a sealed system without electricity. The conductive design safely dissipates any static charge. Pneumatically driven, non-rotating parts eliminate heat generation as a source of ignition and the enclosed system prevents nuisance dust from accumulating as a fuel source. — Volkmann USA, Bristol, Pa.