Dynamic Pass Box

What is a Dynamic Pass Box?

A dynamic pass box is an auxiliary device installed between rooms of different cleanliness grades (e.g., from a standard area to a clean area, or from a low-clean area to a high-clean area).

Dynamic Pass-Through Box Structural Analysis Diagram

Its distinction from a standard (static) pass box lies in the term “dynamic”:

• Static Pass Box: Simply an interlocked steel box without self-cleaning capability. Limited to transferring items between areas of the same cleanliness level.
• Dynamic Pass Box: Equipped internally with a fan and HEPA filter. When items are placed inside, the device automatically activates laminar flow purification mode. This blows off and filters dust from the item’s surface, ensuring it meets cleanliness standards before entering the core clean area.

Why Upgrade to a Dynamic Pass-Through Chamber?

In GMP pharmaceutical facilities or precision electronics workshops, we recommend dynamic pass-through chambers primarily due to the following design advantages—standards that boben Modular Cleanroom Manufacturers consistently upholds in product design:

A. Integrated Inner Tank with Radius Corner Design (Hygienic Design)

We understand that “cleaning dead zones” are breeding grounds for microorganisms. Therefore, we employ an integrated SUS304 stainless steel inner tank with large radius corners (R corners) at internal junctions.

• Advantages: Seamless construction allows for thorough cleaning with a single wipe, fully meeting FDA and GMP cleaning validation requirements.

B. Smart Interlock System

• Electronic Interlock: When one door opens, the electromagnetic lock on the opposite door automatically engages, accompanied by an indicator light. Compared to traditional mechanical interlocks, it offers enhanced durability and lower failure rates.
• Sealing Performance: The door features dual-layer embedded sealing strips, delivering exceptional airtightness that resists aging even with prolonged use.

C. Differential Pressure and Test Port

High-end models feature a differential pressure gauge for real-time monitoring of filter resistance. A dedicated DOP/PAO test port is provided to facilitate third-party integrity testing of the filter—a critical requirement for certification.

Comparison: Dynamic vs. Static

To help you make the most informed budget decision, we’ve created this comparison chart:

Features	Static Pass Box	Dynamic Pass Box
Self-purification capability	None	Active HEPA Filtration
Applicable Scenarios	Between areas of the same cleanliness level	Between areas of different cleanliness levels
Key Features	Physical barrier to prevent convection	Physical barrier + Remove dust from surfaces
Price Cost	Low	Medium-high
Common Applications	General electronics factories, food packaging areas	Pharmaceutical cleanrooms, biological laboratories, semiconductor manufacturing facilities

Although the dynamic pass-through chamber is just a small piece of equipment in a cleanroom, it serves as a critical defense against contamination. Poor-quality pass-through chambers often suffer from seal deterioration and leakage, along with interlock malfunctions and jamming, all of which pose significant risks to production.

Dynamic Pass Box Customer Case Studies

With years of export experience, boben Modular Cleanroom Manufacturers provides dynamic pass-through chamber solutions that meet international standards.