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

Options

• 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

Chemicals

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