volumetric weight feeder

Acrison volumetric weight feeders are universally recognized for their unique ability to accurately and reliably feed an extremely broad variety of dry solid materials.Volumetric feeders can provide reliable feedrates with accuracies to ± 1 % by volume, or ± 3% by weight. Volumetric feeders meter a consistent volume of material, such as a screw pocket, by the speed or revolution rate of the discharge device. This releases a steady quantity of material over time, which provides an economical way to meter materials that have a consistent bulk density.

volumetric weight feeders are utilized industry-wide to reliably dose materials without an integrated scale device. For many applications that require repeatable accuracy within ± 0.25%, agravimetric feeder may be recommended. Gravimetric feeders feature a highly accurate scale which monitors the feeding process by weight and adjusts the feed rate to ensure the proper amount of material is delivered at all times.

The volumetric weight feeder does this by determining the product of the fuel belt load multiplied by the speed to give the actual flow rate (e.g. tons/hr). This flow rate is compared to the boiler set point and the belt speed is varied accordingly.