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Architectural |
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Applications
45 Degree Louver
This is a movable blade louver,
adjustable from closed to 45 degrees open. It is used to control
the flow of air in or out of a building by varying how far the slats are
opened.
90 Degree Louver
This is a movable blade louver, adjustable from closed to 90 degrees open.
It is used to control the flow of air in or out of a building by varying
how far the slats or opened. When the slats are in the 90-degree
position the resistance to air flow is at a minimum offering maximum airflow.
Fixed 45 degree Louver
This is a fixed 45 degree blade
air make-up louver. It is used to allow air to flow freely in or
out of a building, while keeping the majority of the elements out.
Back-Draft Louver
This is a gravity type back draft damper. The blades only open
when the pressure on the rear of the blades is high enough to lift them
open. A fan or blower usually provides this pressure either before
or after the damper. It is automatic and requires no means of operation,
closing when the pressure equalizes across the damper.
Technical Information
All parts, jambs, headers, sills, slats or vanes are made of gel coated
fiberglass reinforced plastic (FRP), using resins tailored to the specific
corrosive environment stated by the purchaser at the time the order was
placed. Louvers have a glass-to-resin ratio of least 30:70.
Chem-Pruf® louvers are of flush construction, with a gel coated outer
surface of approximately 25-mils, defining the color selected. This
color coat, which is integrally molded as the part is made, is the primary
barrier against environmental or chemical attack.
The bosses for securing and positioning the slats or vanes are integrally
molded at one time, as the jambs are formed.
All parts are fabricated or molded as follows: All exterior surfaces are
colored with a 25-mil gel coat layer. This is followed by forming
an envelope, consisting of 2 oz. of continuous strand mat, around the
reinforcement systems to form a completely solid, corrosion-resistant,
armored part. Pultruded glass products do not have the molded-in
gel coat protective barrier.
All reinforcing resins contain a halogenated additive, or co-reactants
with antimony trioxide. Resins yield a maximum flame spread of 25,
per ASTM E-84, and are self-extinguishing per ASTM D-635. The use
of ATH (Hydrated Aluminum Powder) to lower smoke propagation and depress
ignitability is frequently utilized.