Processing Magazine

Gravimetric Feeder Accurately Measures, Controls Any Free-Flowing Solid

April 19, 2011

The CentriFeeder™ with Integrated Control Valve (ICV) is both a controlled feed device and a mass flow measurement device in a single multi-functioning unit that will accurately measure and control the flow of any dry, free-flowing solid. Using a highly customizable touchscreen HMI equipped with an integrated servo, a PID control loop is established to control the ICV feeding the CentriFlow® Meter. For precise measurement and control, an integral linear position sensor is used to regulate the blade’s position to within 1 part in 1,000 (based on stroke). For delicate products, the CentriFeeder with ICV is equipped with a Virtual Flow Stop™ function, which stops flow with virtually no damage to the product. The outcome is an easily maintained, consistent flow that can, under some conditions, be controlled over a 100:1 range for batching, blending and ratio-control applications.