Which parts need special consideration when packaging acidic powders?
• Product-contact hopper, auger filler and former must be 316L stainless steel or PTFE-coated; carbon steel is prohibited.
• Heat-seal jaws and sealing grippers require acid-resistant coating (e.g. Teflon) or Hastelloy to prevent corrosion of the seal surface.
• Load cells and vibratory feeders in the metering system need IP65+ full sealing to avoid acid powder ingress causing weighing drift.
• Dust extraction and exhaust ducts must be PP or PVC with acid mist neutralization filters to protect the fan and meet emission limits.
• All gaskets and flexible connections must be EPDM or FKM, not standard NBR, with replacement interval shortened to 3 months.
• Heat-seal jaws and sealing grippers require acid-resistant coating (e.g. Teflon) or Hastelloy to prevent corrosion of the seal surface.
• Load cells and vibratory feeders in the metering system need IP65+ full sealing to avoid acid powder ingress causing weighing drift.
• Dust extraction and exhaust ducts must be PP or PVC with acid mist neutralization filters to protect the fan and meet emission limits.
• All gaskets and flexible connections must be EPDM or FKM, not standard NBR, with replacement interval shortened to 3 months.