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COVERAGE - OPEN BLOW
Coverage may be defined as the maximum allowable square feet covered per bag at a minimum specified depth
and weight per square foot at a given “R” value. A manufacturer might recommend that the material be blown
at a rate of 79 sq ft per bag at a depth of 8-3/4" and a weight 0.444 lbs per sq ft to achieve an insulation value
of R-19. If you opened a bag of material and hand distributed it to a depth of 8-3/4", it would only cover 15 - 16 sq
ft. Fiber must be worked or conditioned by your
Volu-Matic 500
machine to achieve coverage of 79 sq ft per bag.
Coverage decreases when feed rates are too low and material is overworked by the machine mechanisms
(or the wrong hose is used) rolling the fibers into tight little balls. Coverage will also decrease if feed rates are
too high, allowing material to pass through the machine before it has been opened to the proper density.
An option to coverage problems can also be controlled to some extent with the use of a stator bar in the
shredder housing. Remove cover plate
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and insert stator bar making sure shredder hammers clear pins
before bolting down. This adjustment should be done only after various settings of the air bleed control valve,
slide gate, and transmission speed do not gain desired results. The stator bar can help increase coverage,
but it can also decrease coverage and slow the feed rate of the machine.
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Summary of Contents for CertainTeed Volu-Matic 500
Page 6: ...6 Introduction...
Page 24: ...24 Preventive Maintenance...
Page 38: ...38 Troubleshooting...
Page 42: ...42 Parts Drawings...
Page 57: ...57...
Page 61: ...61 Preventive Maintenance Record DATE JOB DESCRIPTION PERFORMED BY...