Volumetric Screw Feeder

The VMF-90D volumetric screw feeder is an automatic, metering screw feed system for mixing and dispensing dry materials into a secondary process. To expedite delivery and installation, Scaletron has included a functionality that previously was available only as options. The resulting feeder is not only operationally robust, but it is also versatile and installs quickly into a wide range of additive metering systems.

Among the numerous efficiency- and productivity-building standard features in the VMF-90D feeder are a concentric material conditioning overwind auger, an SCR controller that may be remotely mounted, a 4-20mA output integrated cycle timer, an alarm sensor, and a vibratory agitator.

Made of rugged, corrosion-resistant stainless steel, the new VMF-90D feeder is designed for use in water, wastewater, and chemical processing applications. The feeder accurately dispenses most chemicals found in the water and wastewater industries at feed rates of 0.77 to 7.73 cu. ft. per hour and with accuracy to within 1.0% of volume. The built-in 1.5 cu. ft. gravity fed hopper is fed via stainless steel, 1.5" diameter open helix feed screw. The hopper features a maintenance access hatch and an integrated load cell attachment point.

Although the unit is pre-engineered to be fully operational off-the-shelf, the Scaletron VMF-90D feeder also offers options for increased versatility and performance. For example, customers may improve precision in dosing operations with an integrated "loss in weight" measurement system available with four load cells and a digital scale controller. For work environments where flammable materials, an explosion-proof motor option drives safety measures and helps give workers peace of mind. Other options include a pneumatic vibratory agitator, removable lid and feeder stand.