Loss-in-weight feeder connections: More flexibility equals better feeding performance
Properly connecting your loss-in-weight feeder to your process equipment can help ensure that the feeder will reliably weigh and dispense dry bulk material to your process. The trick is to install the feeder in a way that prevents external components from interfering with the feeder's weighing ability. This article describes various types of connections and how to install them to ensure that they are flexible and don't impair your loss- in- weight feeder's performance.
A loss-in-weight [LIW] feeder measures the weight loss of a dry bulk material in an integral hopper as the material is dispensed to a process. This weight information is used to control the feedrate. Some of the feeder components are weighed components that move in response to the material's weight loss. These include the feeder's hopper, discharge device [such as a screw feeder, vibratory tray feeder, or belt feeder], and motor. Other components -- including the feeder's frame and support structure -- are nonweighed components that remain stationary. The LIW feeder hopper's load cell or cells, their mounting hardware, and wiring link the feeder's weighed and nonweighed components.