Scope, Options and Exclusions in a Centrifugal Spray Dryer RFQ
A buyer-focused guide to framing an RFQ for a centrifugal spray dryer, using reference temperature and atomizer ranges to structure scope, options and exclusions.
Start by deciding whether your RFQ asks suppliers to quote a complete drying line or only the dryer core, because that single choice shapes every option and exclusion that follows. A complete-line scope might cover feed preparation, the centrifugal atomizer, drying chamber, air heating, powder recovery and controls; a core-only scope leaves those interfaces to you.
Use the reference values as discussion points, not guarantees: inlet air temperature 100–280 °C, outlet air temperature 60–130 °C, and rotary atomizer speed 18,000–24,000 rpm. Ask each bidder to state the operating window it proposes for your liquid and how it will hold that window during turndown. In the RFQ, require a demonstration or acceptance test that records inlet and outlet temperatures and atomizer speed at agreed setpoints.
List options explicitly: feed pump and atomizer drive, chamber and duct materials, powder collection method, cleaning access, instrumentation and control philosophy. List exclusions explicitly too, such as utilities, civil works, installation, commissioning, spare parts and operator training. Ask bidders to price each option separately so comparisons stay meaningful.
Before requesting a quote, confirm with the supplier which items are inside the quoted scope, which are options, and which are excluded, and ask how the proposed temperature and atomizer speed ranges will be verified at acceptance.