A Practical and Quality focused filter manufacturer.
 SF Filter (Shuangfa) is one of the earliest water filter manufacturers in China, established in 1991, product certified by NSF since 2015, WQA membership since 2016, implementing ISO 9001 since 2017 and certified in 2022, focused on filter cartridges for water/liquid filtration and purification.  We believe in data, at SF, research and quality control are based on product performance.
  Our product includes String wound filters, Melt blown filters, Activated carbon filters, Pleated filters and filter systems.