Published · Kuohai Editorial
State the screw duty
KWS describes screw feeders as metering bulk material with a flood-loaded inlet [1]. This distinguishes the design enquiry from a simple transfer task. Mark the upstream hopper and downstream destination, then ask the supplier to identify the duty of the proposed screw instead of selecting it only by outside diameter.
Provide the material and rate basis
Record material identity, available bulk-density data, normal and peak mass rate and the duration of those cases. Describe observed poor flow or moisture without assigning an invented flow property. Ask which additional sample or test information the supplier requires before confirming the selection.
Include the hopper opening and interfaces
Supply drawings of the outlet opening, available length, inclination and receiving connection. Identify the proposed drive-side access and who supplies the transition. Our procurement recommendation is to keep these interfaces with the capacity enquiry so that an equipment number is not separated from the arrangement it assumes.
Compare the actual offered scope
Ask the supplier to state the screw configuration, drive and control scope, assumptions and exclusions. Agree what records will demonstrate the intended feeding task at commissioning. A workshop image shows a construction form; it does not prove output for a particular material or inlet condition.
FAQ: Can equal screw diameter establish equal feeding duty?
No. Compare the documented material basis, inlet condition and configuration.
FAQ: What if material flow data are missing?
Identify the gap and keep selection preliminary until the supplier confirms the required evidence.
Technical sources and editorial note
Independently written guide. Referenced technical descriptions are attributed in the body; project record and procurement steps are editorial recommendations. Existing photographs are contextual examples and do not establish a brand, certification or project performance. Sources reviewed 4 November 2026.
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Use this guide to prepare for an equipment discussion. Confirm selection and operating requirements against your actual process and site conditions.