Food Engineering

Volumetric powder feeders

August 1, 2011


Thayer Scale’s line of volumetric powder feeders handles a wide range of material bulk densities at low to medium feed rates. Each of the three machines in the line include the supplier’s “U-Trough” hopper and feed section, which provides a practical and economical means for metering difficult-to-control powders. The geometry of the trough and agitator effectively de-aerate and contain the powder on initial fill to help prevent flooding. The independently driven agitator maintains optimum material conditioning while screw speed can vary to control flow rate. Material does not build up within the trough or within the continuous screw tube, preventing blinding or erratic feed. Each of the three machines in the line has the ability to feed materials with an accuracy of ±1 to 2 percent of set rate. Models include the PFM-S (feed rate up to 25 ft.³/hr.), PF-S-6 (feed rate up to 635 ft.³/hr.) and the PF-S-4 (feed rate up to 205 ft.³/hr.).

Thayer Scale; 781-826-8101; www.thayerscale.com