Cleanroom Equipment
Dynamic Pass Box
Compared to a Static Pass Box, it has larger external dimensions for the same internal size and a higher manufacturing cost. Dynamic pass boxes are divided into two subtypes: Laminar Flow Pass Box, which provides vertical laminar airflow in a top-supply
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Dynamic Pass Box: Self-Circulating HEPA Material Transfer
The dynamic pass box uses a self-circulating, HEPA-filtered airflow pattern to purge particulates from items during transfer between zones of different cleanliness. Unlike a static unit, the dynamic cleanroom pass box actively cleans the material surface, protecting higher-grade areas from cross-contamination.
It is part of our complete material-transfer family with the static pass box, aluminum pass box and VHP pass box.
Dynamic Pass Box Specifications
Standard configuration for the Wonclean dynamic pass box. Airflow type, dimensions and interlock are all customizable to project and cleanroom classification requirements.
| Airflow pattern | Self-circulating; top-supply, bottom-return (laminar type) |
|---|---|
| Air velocity (shower type) | ≥ 25 m/s (typical) |
| Filtration | Built-in HEPA filter with fan; continuous recirculation |
| Chamber material | Stainless steel interior (304/316L options) |
| Interlock type | Dual-door mechanical / electronic interlock |
| Configurations | Laminar-flow (flow straightener) or air-shower (nozzle) type |
| External dimensions | Larger than equivalent static pass box (custom) |
| Optional functions | UV lamp, intercom, observation window |
| Cleanliness grade | ISO 14644-1 Class 5–8 ready |
Values shown are standard/representative configurations. Confirm final certified figures (airflow, filter integrity) against the project datasheet before specification — Wonclean issues a stamped datasheet with every quotation.
Dynamic Pass Box Construction
The self-circulating airflow loop is the engineering secret. A built-in fan drives chamber air through a HEPA filter continuously, creating a micro self-circulating clean environment — offered as a laminar-flow type with flow straightener or an air-shower type with circular nozzles.
Why Choose Our Dynamic Pass Box
Continuous purification
Self-circulating airflow removes contamination continuously to keep the chamber clean.
Active particle removal
Air-shower nozzles (≥ 25 m/s) blow particles off transferred goods before entry.
Uniform laminar option
Flow straightener delivers a uniform laminar micro-environment for sensitive items.
Interlock protection
Dual-door interlock prevents simultaneous opening and protects the pressure cascade.
Higher cleanliness
Built-in HEPA filtration raises internal cleanliness above passive static pass boxes.
Customizable
Optional UV lamp, intercom and custom dimensions to match the transfer application.
Dynamic Pass Box Applications
Specified as active HEPA-filtered transfer pass boxes across regulated and high-precision industries. See real cleanroom project case studies or browse the full cleanroom product range.
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Send your cleanroom classification, floor area and finish requirements. Our Malaysia-based engineering team replies with a stamped datasheet, fire certificate and pricing — 7×24 technical support by email, phone or WhatsApp.
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