Description
Aerospace Applications
Because of the hazardous nature of the chromate paints used in painting aerospace vehicles and components, there are National Emissions Standards for Hazardous Air Pollutants (NESHAP) efficiency requirements for the filters used in these applications. The requirements are based on the EPA Method 319 Test, which is a particulate efficiency test using both a dry particulate (potassium chloride) and a wet particulate (oleic acid).
When tested per the EPA Method 319 Test protocol, the SureStop 319Plus filter exceeds the NESHAP requirements in existing 2-stage aerospace applications.
Multi-Layer Media Design
The media composition of the SureStop 319Plus filter consists of two, multi-layered pieces of media, and is designed for both high paint holding capacity as well as high efficiency on paint overspray particulate.
Prefilter Layer – composed of a dual density, heavy duty, synthetic paint arresting media. The initial layer is a blend of four fiber sizes forming an open media for collecting large quantities of the overspray material. The second layer is a densified material made of a single fiber size providing a graded density material for added depth loading and structural support.
Efficiency Layer – composed of a polypropylene fine fiber layer, between two layers of polypropylene scrim material for increased strength and durability.
Self-Sealing Design
The finished filter is formed by sonically bonding the media around an internal wire support frame. The bonding of the media around the frame forms a built-in gasket between the wire support frame and holding frame that secures the filter in place and seals it to prevent bypass. The self-sealing design provides the fastest, easiest installation of any extended surface filter on the market.
Prefilters
The SureStop 319Plus 2-pocket cube filter meets the NESHAP requirements, as a freestanding filter. No specific prefilter media or filter is required. This provides the end user the flexibility to use the prefilter of their choice. AAF also offers a wide range of paper, paper/synthetic, and fiberglass paint arrestor products for use as a prefilter.
