RFQ Scope for a Circular Vibrating Screen: Options, Exclusions and Checks
A buyer's guide to scoping an RFQ for a circular vibrating screen used on rock and ore, covering capacity assumptions, option choices and exclusions to confirm before award.
Start your RFQ by fixing the duty point: state the rock or ore type, the feed size distribution up to the stated maximum feed size of 200 mm, and the target tonnage within the 230–800 t/h capacity range. Ask each supplier to state the basis for its quoted throughput and the screening area it assumes; a catalog reference value of 12.6 m² and 22 kW motor power should be treated as reference values, not guaranteed for every supplied model.
Then separate scope into base supply, options and exclusions. Will the offer include the screen body, drive and motor only, or also the support frame, chutes, dust enclosures, liners and access platforms? Which screen media type and aperture are priced, and are spares included? For options, ask for prices on wear liners, alternative deck configurations and monitoring. For exclusions, confirm who supplies foundations, structural steel, electrical cabling and installation.
In a demonstration or acceptance test, agree the material sample, feed rate and measurement method, and record capacity, product size and power draw against the quoted basis.
Before requesting a quote, confirm with the supplier the exact model and its screening area, the motor rating, the maximum feed size it accepts, the capacity basis and test conditions, and a written list of what is included and excluded.