CFI Dry Fabric Pre-Filter is used in air conditioning, compressor air intake and general ventilation as a pre filter at the atmosphere end.
CFI Dry Fabric Pre-Filter is made of one layer washable type non-woven polyester media with HDP backing on both sides and stiched together in a deep crimped formation to provide maximum filteration area. The media is separated by G.I. spacers to allow uniform flow and finally fitted in G.I. Filter Frame.
The size of this filter is generally 610 x 610 x 150 mm in both Cassette (Box) type and Fanged type, but it can be made in any other size according to the requirement of the system.
Recomended Air Velocity :2 m/sec. to 2.5 m/sec.
Initial Pressure Drop : 4 mm Wg.
Final Pressure Drop : 8 mm Wg.
(When Filter needs Cleaning)
Average Synthetic Dust Wt. Arrestance : 85%
As per BS. EN. 779 & ASHRAE 52.1 .
Average Atmospheric Dust Efficiency (Micronic) :
45% Using Laser-based Particle Counter