{"id":5539,"date":"2025-08-19T15:23:54","date_gmt":"2025-08-19T07:23:54","guid":{"rendered":"https:\/\/www.watercarechem.com\/?p=5539"},"modified":"2026-02-04T12:41:30","modified_gmt":"2026-02-04T04:41:30","slug":"polyferric-sulfate-pfs-classification","status":"publish","type":"post","link":"https:\/\/www.watercarechem.com\/de\/polyferric-sulfate-pfs-classification\/","title":{"rendered":"Polyferric Sulfate (PFS) Classification: Grade I vs Qualified Grade and How to Choose for Water Treatment"},"content":{"rendered":"

Polyferric Sulfate (PFS)<\/a> Classification: Grade I vs Qualified Grade and How to Choose for Water Treatment<\/h1>\n

Many water treatment engineers<\/strong> and procurement professionals<\/strong> often ask: “What\u2019s the difference between Grade I PFS and Qualified Grade PFS? Can industrial-grade PFS be used for drinking water?”<\/em><\/p>\n

The answer lies in Polyferric Sulfate\u2019s (PFS) clear classification system<\/strong>\u2014based on national standards, product forms, and application scenarios. Choosing the right type not only ensures regulatory compliance but also optimizes performance and saves costs<\/strong>.<\/p>\n

According to the WHO drinking water quality guidelines<\/a>, proper selection of coagulants like PFS is critical for safe water treatment.<\/p>\n

Below is a complete guide to help you make the right choice.<\/p>\n

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1. Polyferric Sulfate (PFS) Classification by National Standard (GB\/T14591-2016): Ensuring Compliance<\/h2>\n

National standards are critical<\/strong>, especially for drinking water treatment<\/strong>. GB\/T14591-2016 divides PFS into Grade I (First Class)<\/strong> and Qualified Grade<\/strong>, with strict limits on iron content, basicity, and heavy metals.<\/p>\n

\n
\n\n\n\n\n\n\n\n\n\n\n\n\n
Index<\/th>\nGrade I (First Class)<\/th>\nQualified Grade<\/th>\n<\/tr>\n<\/thead>\n
Total Iron Content (Liquid)<\/td>\n>11.0%<\/td>\n\u226511.0%<\/td>\n<\/tr>\n
Total Iron Content (Solid)<\/td>\n>19.5%<\/td>\n\u226519.5%<\/td>\n<\/tr>\n
Grundwissen<\/td>\n8.0%-16.0%<\/td>\n5.0%-20.0%<\/td>\n<\/tr>\n
Arsenic (As) Limit<\/td>\n\u22640.0001% (1ppm)<\/td>\n\u22640.0005% (5ppm)<\/td>\n<\/tr>\n
Lead (Pb) Limit<\/td>\n\u22640.0002% (2ppm)<\/td>\n\u22640.001% (10ppm)<\/td>\n<\/tr>\n
Cadmium (Cd) Limit<\/td>\n\u22640.00005% (0.5ppm)<\/td>\n\u22640.00025% (2.5ppm)<\/td>\n<\/tr>\n
Raw Material Requirement<\/td>\nFerrous sulfate must meet Grade I<\/td>\nNo strict raw material grade<\/td>\n<\/tr>\n
Application Scenario<\/td>\nDrinking water treatment<\/td>\nIndustrial or non-potable water treatment<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n

Selection Tip:<\/strong><\/p>\n