Indoor Air Quality (IAQ) has become a
popular topic during the past decade. Where it was mainly a concern
of building managers and company owners, interest in clean indoor air
has become a major concern of home owners in today's society. Allergy
sufferers are among those especially affected.
For air filters, efficiency is determined by the relative size of the
filter fibers, the density of the fibers in the filter, the adhesive, if
applied, and the velocity at which the air is moving through the filter.
Generally, large filter fibers are effective on large particles at high
velocities and small filter fibers work best on small particles at low
velocities. Proper filter design, including choice of fiber diameter,
density of media, and the proper adhesive, are necessary for a filter to
function properly. With proper design it is possible for a filter to
function well beyond its nominal theoretical efficiency range. For
example, a properly designed synthetic media filter, with the proper
adhesive, will function as well or better in the medium efficiency range
than a dry fine fibered filter.
If the filter fibers are designed to remove large particles, they will
not be effective on smaller particles regardless of the depth of the
filter. For this reason, properly designed filters must be used to stop
fine dust particles. Also, many filter fibers will initially stop dust
particles, but will release them after unless the proper adhesive is
employed to permanently trap the particles.
Fiberglass Filters
Fiberglass filters perform best in conditions where
large quantities of lint, dust, and other particles are present.
Their rugged construction makes them industry leaders in the
high-velocity system, pre-filter market.
The unique Monobond concept involves a one-piece frame sealed to the
media under heat and pressure. This construction feature produces a
continuous bond of media to board around the periphery of the frame
eliminating weak corners and air bypass. The use of a high tensile
strength polyethylene binder increases the integrity of the seal,
allowing the filter to withstand varying temperatures and humidity
levels.
Pleated Filters
Effective in stand-alone applications or as a pre-filter in place of a
disposable, permanent, or media pad/frame filter.
Easy to install in new or existing side-access housings, package air
handling units, and built-up filter banks.
Average efficiency: 25-30%
Average arrestance: 90-93%
Media: Lofted, non-woven pleated filter media composed of non-dyed
cotton and synthetic fibers.
Media support: Continuously bonded to a corrosion resistant, expanded
metal grid allowing 95% open face area.
Pleat configuration: Formed into aerodynamic, semi tapered, wedge-shaped
pleats expanding its capability to capture contaminants.
Assembly: A fully bonded double wall frame combines with the integral
corner flaps and forms a rugged, durable filter which will not rack,
warp or leak under normal operating conditions.
To assure no dirty air bypass, the media pack is securely bonded to the
periphery of the enclosure frame with solvent-free water based glue.
Recommended operating temperature: <200 F. |
