1.Filter dust, pre-filter through air filter 
2.program, also used in the clean room
3.Type: synthetic fiber foldaway filter
4.Frame: aluminum or galvanized, with dismountableframe design
5.Media: washable synthetic fiber, can wash 6-8 times
6.EN779 class: G3,G4
7.Average arrestance:84%-88%(ASHRAE52.1-1992)
8.EUROVENT4/5 class: EU3,EU4
9.DIN53438 Non-flammability Standard: F1 
10.Final resistance: (suggest) 200Pa-250Pa
11.Max. air flow: 125% of the rated air flow
12.Temp. resistance: ≤100°C
13.Humidity:100%
It mainly filters the particles with diameters of over 5 micron, the frame is made of hard anti-flame paper boards or aluminum and it was combined with synthetic glass fiber or glass fiber, the filter can be flat or folded, the cost is much lower, resistance is small, the dust capacity is large, it is changed easily. The filtration grade is G3,G4, it is used widely for primary filtration.

Note: Other specifications are available on request