Hethon feeders are dosing devices with screw discharge but with a flexible wall hopper to ensure bridging and rat holing of difficult material is eliminated. The flexible walls are massaged by an arrangement of paddles to ensure an uninterrupted flow without any contact with the material itself.

Five models in the range provide a feed rate between 120 and 30,000 litres per hour.

> Model 40 for maximum 120 l/h.
> Model 50 for maximum 480 l/h.
> Model 60 for maximum 1200 l/h.
> Model 70 for maximum 2500 l/h.
> Model 80 for maximum 30000 l/h

The Hethon feeder comes with many options, interchangeable screws to suit different materials, extension hoppers, using different contact parts and with control options including gravimetric metering.