Model VMF-90C™ Economical Volumetric Screw Feeder

Model VMF-90C™ Economical Volumetric Screw Feeder


  • 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 0.13 to 1.27 cu. ft. per hour
  • Accuracy of within 1.0% of volume

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Scaletron 2 Year Warranty on All Feeder Products

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

The Model VMF-90C Volumetric Screw Feeder has been designed to be a “stand alone” option for adding a simple volumetric feeding unit to any process. The VMF-90C 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. The VMF-90C is the perfect choice for an economical, basic feeder while still incorporating a few standard industry upgrades like a concentric material conditioning auger, SCR motor controller and a vibratory agitator mount.

Standard Features

  • Rugged, carbon steel construction with corrosion resistant zinc oxide primed, dry powder epoxy coating
  • Built-in 1.5 cu. ft. gravity fed hopper with maintenance access hatch and integrated load cell attachment point
  • 3/4″ Diameter open helix feed screw in 304 stainless steel with “bayonet” style connection
  • Standard concentric material conditioning overwind auger
  • Standard vibratory agitator mounting bracket
  • Water and dust proof NEMA 4X, variable speed motor controller capable of remote installation
  • 90 VDC right-angle geared, wash down motor


  • All 304 stainless steel construction
  • 316 Stainless steel augers and overwind helix augers
  • Electric vibratory agitator
  • Lift-off, hinged, clamp-on and adapter lids
  • Feeder stands and elevated loading platforms


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