Model VMF-90D™ Volumetric Screw Feeder with Vibratory Agitator

Model VMF-90D™ Volumetric Screw Feeder with Vibratory Agitator


  • Automatic metering screw feed system for mixing and dispensing dry polymers into a secondary process
  • Ideal for water, wastewater and chemical processing applications
  • Heavy-duty, gear-driven auger for metering mechanism
  • Built-in hopper capacity of 1.5 cu. ft.
  • Feed rate 0.77 to 7.73 cu. ft. per hour
  • Accuracy of within 1.0% of volume
  • Optional gravimetric feeding with integrated “Loss in Weight” system

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Scaletron 2 Year Warranty on All Feeder Products

Automatic Metering Screw Feed System for Mixing and Dispensing Dry Polymers into A Secondary Process

The Model VMF-90D Volumetric Screw Feeder with Vibratory Agitator has been designed to be an “off the shelf” option for upgrading or replacing existing volumetric feeding units. The VMF-90D is capable of accurately dispensing many common chemicals found in the water and waste water industries, as well as, a host of other industrial chemicals. Scaletron decided to offer many optional features as standard equipment on the VMF-90D so that one feeder can be adapted to many systems. Features like a concentric material conditioning overwind auger, remote location mountable SCR controller, 4-20mA output, integrated cycle timer, alarm sensor and a vibratory agitator are all standard.

Standard Features

  • Rugged, corrosion resistant 304 stainless steel construction
  • Built-in 1.5 cu. ft. gravity fed hopper in 304 stainless steel with maintenance access hatch and integrated load cell attachment point
  • 1.5″ diameter open helix feed screw in 304 stainless steel with “bayonet” style connection
  • Standard concentric material conditioning overwind auger
  • Electric vibratory hopper agitator/material conditioner
  • Water and dust proof NEMA 4X, variable speed motor controller capable of remote installation
  • 90 VDC right-angle geared, wash down motor


  • Integrated “Loss in Weight” measurement system with four (4) load cells and Model AccuPro 5000 Digital Controller
  • 316 Stainless steel augers and overwind helix augers
  • Explosion proof motor
  • Pneumatic vibratory agitator
  • Lift-off, hinged, clamp-on and adapter lids
  • Feeder stands and elevated loading platforms
  • Programmable controller module stand


Feeder and scale are designed to accurately dispense:

  • Aluminum sulfate (alum), calcium hydroxide (hydrated lime), carbon, ferric and ferrous sulfate, magnesium hydroxide, polymers, potassium, soda ash, sodium sulfite and thiosulfate, and other dry powders or pelletized materials