What an Automatic Spray Tunnel Does to a Filled Package
A spray tunnel changes package temperature through controlled water-spray zones. It can serve heating or cooling duties according to its design. Temperature conditioning should not automatically be described as a validated pasteurization process.

Inspect the complete temperature path
Measure product or package temperature using the method required by the process. Check spray distribution, conveyor residence and entry conditions. A zone-water display alone cannot show whether every bottle experiences the required treatment.
Check downstream effects
Inspect closure condition, container deformation and surface moisture at discharge. Uneven sprays or blocked nozzles can create different results across conveyor lanes. Use the approved process limits when correcting the tunnel rather than raising every zone temperature together.
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