Rev. Date: 3/14/18 Page 54
MODEL #500
GLOSSARY
BRIDGING Tendency of fiber to cling in the hopper forming an air pocket above the
airlock. This hinders the normal feeding process of the machine.
CFM (Cubic feet per minute). A measurement of volume or quantity of air flowing
at a certain rate, or air moving capability, of a blower. It is the volume of air
moved per minute. Higher volume provides increased coverage and velocity
of fiber as it leaves the hose.
CHECK VALVE An apparatus that allows air to flow in one direction only. When mounted on
the outlet of the blower, it protects the blower from fiber contamination
through the air hose when using one blower. When the blower stops, the
valve closes.
COMMERCIAL The application of fiber with adhesive to a surface which will remain ex-
posed. The application must therefore be impacted in a smooth, uniform
manner.
COVERAGE Refers to the amount of fiber coverage, usually measured in square feet,
according to the R-value desired. This information is given on the fiber
package.
NEW CONSTRUCTION The spray application of fiber with water or adhesive into an exposed wall
cavity to later be covered with drywall sheathing, etc.
PSI (Pounds of pressure per square inch). The force exerted on a surface by air/
liquid. High-pressure blowers push the fiber through the hose. Higher
pressure provides less hose plugging and increased compaction in side
wall.
PRODUCTION RATE Pounds of fiber blown per hour.
RPM (Revolutions per minute). Speed at which the shaft of a rotating device (i.e.
blower fan, agitator) is moving.
R-VALUE Resistance value. A precise measurement of the insulation's resistance to
heat transfer. The higher the resistance value, the slower the heat will
transfer through the insulating material.
RETRO-SIDEWALL This refers to the installation of fiber into an unexposed wall cavity. Fiber is
usually installed through holes drilled into the exterior siding.
SETTLED DENSITY The point at which the fiber will not continue to settle further. Any insulation
blown will have a certain amount of progressive settling that occurs after a
period of time. Following the fiber manufacturers recommendations for bag
rate coverage will provide useful information to accommodate for settling.
SETTLING Compression or compaction of insulation fibers caused by the weight of the
material, vibration of structure, temperature, and humidity cycles.
SPRAY ON
WALL CAVITY SPRAY
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