
Rev. Date: 1/3/12
Page 34
MODEL #4200-D
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 contamina-
tion 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
SPRAY-ON
exposed. 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 SPRAY
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 manufacturer’s
recommendations for bag rate coverage will provide useful information
to accommodate for settling.
SETTLING
Compression of compaction of insulation fibers caused by the weight of
the material, vibration of structure, temperature, and humidity cycles.
Содержание 4200-D
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