Pass boxes acts as barriers between 2 classified areas. They might be used for material transfer either directly into manufacturing zones for further processing like Blending, Mixing, Sieving, process cleaning and or sterilization. These passboxes also aid in packing areas and also transferring used equipment parts and utensils out of classified areas.
In such casses essentially these are used as temporary barriers. They must be Validated and documented for their efficiency.What ever the Industry you are working (Starting from Orgal solids to Oral powders to Semisolids to Injectable to Oncology products to Biologicals), all such Pass boxes must be Qualified/Validated for suitability of their application and working.