Dynamic Pass Box

A dynamic pass box is an active cleanroom transfer chamber installed between rooms of different cleanliness (ISO class) levels. It has interlocking doors and a built-in HEPA-filtered blower to maintain positive airflow inside, protecting the clean environment. Material entering is subjected to vertical HEPA-filtered laminar air flowhvax.in. These units often include UV lights and can even be fitted with vaporized hydrogen peroxide systems (called “bio-decon pass boxes”) .

Type of Dynamic Pass  Box

This is a specialized active pass-through box (also called a “bio-decon pass box” when VHP-equipped). It is classified as ISO Class 5 (Class A) airlock equipment. Key features include motor-blown HEPA filtration, interlocked double doors (only one door opens at a time), and UV sterilization.

Application in Various Industries

Widely used in pharmaceutical, biotechnology, medical-device manufacturing, and semiconductor industries to safely transfer materials between differently classified zones (e.g., from an ISO 8 buffer to an ISO 7 cleanroom) . Dynamic pass boxes ensure cross-contamination is minimized during material handover, meeting strict cleanroom and regulatory standards in labs and production facilities.

Material Selection Considerations

Built almost entirely of stainless steel (typically SS304, SS316 or SS316L) for cleanliness and corrosion resistancehvax.in. Doors may have tempered glass viewing panels. Inner surfaces are hermetically sealed with smooth welds or covings for easy cleaning. HEPA filters, a blower fan, and UV lamps are integrated. All components must withstand regular sterilization (e.g. with alcohol or H2O2) and maintain airtight seals.