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Food Science and Technology QUESTION #5938
Question 1
What is the primary function of the flow diversion valve (FDV) in an HTST pasteurizer?
  • To divert cream to the separator
  • To automatically divert milk back to the balance tank if milk temperature drops below \(72^{\circ}\text{C}\), preventing underpasteurized milk from reaching the filler✔️
  • To control the flow rate of milk through the holding tube
  • To separate pasteurized from unpasteurized milk for blending
Correct Answer Explanation
The FDV (divert valve) is controlled by the temperature sensor at the end of the holding tube. If milk temperature drops below \(72^{\circ}\text{C}\) (HTST), the FDV automatically diverts milk back to the raw milk balance tank, preventing underpasteurized milk from entering the pasteurized product stream.