In an automated continuous HTST pasteurization plant, the safety device that prevents sub-pasteurized milk from entering the cooling section by diverting it back to the raw milk balance tank when temperature drops below $72.0^\circ\text{C}$ is the:
Options:
(A) Flow Diversion Valve (FDV)
(B) Back-pressure relief orifice
(C) Centrifugal cream separator
(D) Vacuum deaeration pump
Answer Key:
A
Step-by-Step Solution & Explanation
The Flow Diversion Valve (FDV), actuated by temperature sensors at the holding tube outlet, instantly switches to diversion mode if pasteurization temperature drops below legal limits, recycling milk back to the raw float tank.