HEPA level paint booth overspray filtration system for aerospace applications


First Stage

The CPA pre-filter is a multi-layered polyester media constructed of lofted denier and heavier densified fiber. The air leaving side is inkjet printed for identification and proper installation.

Second Stage

The ME/PT pre-filter is constructed of two different layers of tackified polyester media, RF heat-sealed together. Additional face sealing secures the two layers. Each layer is constructed of a multi-layered, multi-density polyester with heavy, non-migrating tackifier on the air-leaving side.

Third Stage

The first patented HEPA level achieving filtration system designed for aerospace applications. The HEPA-XFP™ 6 Pocket Bag Filter is constructed using 2 plies of electrostatic medias. The first and second plies are a composite of melt blown and spun bound polyester fibers. The third, air leaving ply, is constructed of polypropylene and acrylic media.

3 Ply Electrostatic Media

Using 3 layers of electrostatic media, the HEPA-XFP achieves 99.97% efficiency on 0.3 µm size particles of low viscosity and high viscosity paints, as well as Method 319 test agents, KCL and Oleic Acid. High paint holding capacity and low initial pressure drop ensure a cost-effective solution to achieving the highest efficiency standards available.

Securely Sealed with No Paint Bypass

Each pocket is securely sealed with a galvanized metal gasket header. This eliminates any paint bypass through or around the bag filter.


NESHAP Method 319 Test Results

Particle Size Method 319 Efficiency Requirements HEPA-XFP™ Efficiency
Dry Paint Performance – testing agent KCL neutralized
.73 75% 99.992%
1.16 85% 99.998%
2.85 95% 100.000%
Liquid Paint Performance – testing agent Oleic Acid neutralized
0.47 65% 99.992%
1.41 80% 100.000%
2.83 95% 100.000%








Other Test Results

Paint Tested Paint Arrestance - Average Removal Efficiency Paint Fractional Efficiency
Deft 44-GN-72: 0.2 -0.3 µm (dry, low viscosity) 99.999% 99.98%
Deft 02-Y-040A: 0.2-0.3 µm (liquid, high viscosity) 99.997% 99.99%
Initial Pressure Drop
0.245 @ 120 FPM (12” final filter)
ASHRAE 52.2 Efficiency
99.989% - 0.30-1.0 μm - MERV 16

*A.J. Dralle, Inc. is dedicated to developing the most efficient and innovative filtration systems. As a research driven company, our systems are products of thorough testing. To demonstrate our dedication, we also test our systems to determine if they meet EPA NESHAP Method 319 standards with actual paint used in field, as well as Method 319 testing agents. If you are interested in paint test results, please give us a call.