ISO14644 Classification

CLASS Number of Particles per Cubic Meter by Micrometer Size
  0.1 um 0.2 um 0.3 um 0.5 um 1 um 5 um
ISO 1 10 2        
ISO 2 100 24 10 4    
ISO 3 1000 237 102 35 8  
ISO 4 10000 2370 1020 352 83  
ISO 5 100000 23700 10200 3520 832 29
ISO 6 1000000 237000 102000 35200 8320 293
ISO 7       352000 83200 2930
ISO 8       3520000 832000 29300
ISO 9       35200000 8320000 2

Hebei Fangyu Filter Material Technology Co.,Ltd is the leading innovative developer and manufacturer all kinds of filter materials in China.pocket filter media factory Located in the economically developed Handan Hebei specialized in various kinds of filter materials from Synthetic Media,Paint stop Filter Media Pre- filter Non Woven Fabric ,Wire Mesh Backed Laminated Filter Media,Ceiling filter Auto Cabin Filter Media, polypropylene filter media, Glass Microfiber Filter Media Nonwoven Fabric,Pre- filter non woven fabric, activated carbon filter materials, EN779 bag filter materials, HEPA filter media, air filter HEPA filter media and Filter Accessories.Our filter materials have passed ISO9001:2000 quality certification since 2005.Certified by ISO9001, UL2 and SGS, with emphasis on quality and service. Our strength is the ability to find innovative ways to meet marketplace or product requirements.activated filter media price