A Static Pass Box is a transfer device used between cleanrooms or sterile environments. It prevents cross-contamination through physical isolation design while maintaining cleanliness on both sides. Unlike dynamic pass boxes, static pass boxes are not equipped with Fan Filter Units (FFU) and rely on pressure differential principles to control airflow.

Working Principle of Static Pass Box

Static pass boxes operate through:

• Dual-door interlock system: Ensures both doors cannot be opened simultaneously
• Sealed design: Prevents air leakage
• UV sterilization lamp (optional): For surface disinfection of items
• Stainless steel or high-quality steel plate material: Easy to clean and disinfect
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Main Application Fields of Static Pass Box

Pharmaceutical industry: For material transfer between areas of different cleanliness levels

Electronics manufacturing: Prevents contamination of precision electronic components

Food processing: Maintains hygienic production standards

Laboratories: Item transfer in biosafety labs

Hospitals: Instrument transfer between operating rooms and preparation rooms

How to Choose the Right Static Pass Box?

Size selection: Determine based on item size

Material requirements: 304 or 316 stainless steel preferred

Sealing performance: Review air tightness test reports

Interlock system: Ensure reliable mechanical or electronic interlock

Certification standards: Compliance with GMP, ISO and other certifications

Additional features: Consider UV lamp, touch screen control, etc.

Installation and Maintenance of Static Pass Box

Installation considerations:

• Must be installed on cleanroom walls
• Ensure good sealing with the wall
• Leakage test required after installation

Routine maintenance:

l Regular cleaning of internal and external surfaces

• Check door seals for integrity
• Test interlock function regularly
• Regular replacement of UV lamps (if equipped)

Conclusion

Static pass boxes are a cost-effective solution for item transfer in clean environments, particularly suitable for applications with budget constraints but not extreme cleanliness requirements. When purchasing, consider size, material and functional configuration based on actual needs, and ensure suppliers can provide comprehensive after-sales service and technical support.