Characteristics: Simple, moderate life, moderate noise medium and heavy duty models, high noise extra heavy duty models, easily adjusted
Description:
A simple design with one rotating roller in most models. Force outputs
are generated at higher frequencies than a comparable ball vibrator.
Driven by compressed air, a ring shaped roller rotates inside the
vibrator housing. The centerline of the roller is slightly offset from
the centerline of the vibrator housing. This produces a centrifugal
force as the roller spins which causes the vibrator to vibrate.
On larger sizes, there are two rollers. There are no bearings. The
force output is easily adjusted by varying the supply air line
pressure.
MODELS:
- Medium Duty - low to medium force output; ideal for small to medium size hoppers.
- Heavy Duty - low to medium for output, but more robust construction than a VR series; uses a precision cast iron roller rotating in high tensile steel races; well suited for the concrete industry.
- Extra Heavy Duty - low to high force output, lower air consumption, high noise levels; ideal to help place, consolidate, and finish precast concrete; repairable.
RECOMMENDATION: Intermittent operation (2 to 4 hours/day) when considering energy usage and life.
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