How should extraction-time control be verified on commercial tea-brewing equipment?

Record programmed extraction time, actual flow time, and stop logic to confirm pressure or flow changes do not terminate the cycle unexpectedly. The buyer should request drawings, parameter limits, and test records so the delivered configuration can be checked objectively. Keep the approved sample and test conditions as a reference for later service, warranty, and performance disputes. The same technical definition should be used during quotation, FAT, delivery inspection, and SAT whenever possible. If the supplier cannot reproduce the agreed test conditions, the claimed capacity should not be treated as a directly comparable figure.