English
What is a Static Pass Box?
Created on 04.18
A Static Pass Box is a transfer device used between cleanrooms or controlled environments. It prevents cross-contamination through a sealed, physical isolation design, ensuring that cleanliness levels on both sides remain stable. Unlike a dynamic pass box, a static pass box does not include a Fan Filter Unit (FFU). Instead, it relies on pressure differentials and mechanical isolation to control airflow during material transfer.
Working Principle of a Static Pass Box
A static pass box operates through several key mechanisms designed to maintain cleanliness and prevent contamination:
1. Dual-Door Interlock System
- Ensures that both doors cannot be opened at the same time
- Prevents air exchange between cleanroom areas of different grades
2. Fully Sealed Construction
- Prevents air leakage during material transfer
- Helps maintain stable pressure differentials
3. Optional UV Sterilization Lamp
- Provides surface sterilization for items
- Reduces microbial contamination
4. Durable Construction Materials
- Usually made of 304 or 316 stainless steel
- Smooth surfaces ensure easy cleaning and disinfection
These combined features allow static pass boxes to offer simple, safe, and reliable material transfer between zones.
Main Application Fields of Static Pass Boxes
Static pass boxes are widely used in industries where contamination control is essential. They are commonly found in:
1. Pharmaceutical Manufacturing
- Transfer of raw materials, semi-finished products, or packaging
- Used between GMP cleanroom zones with different cleanliness levels
2. Electronics Manufacturing
- Prevents contamination of precision components such as chips and circuits
3. Food Processing Facilities
- Maintains hygienic standards during ingredient or utensil transfer
4. Research & Biosafety Laboratories
- Reduces contamination risks when moving samples or equipment
5. Hospitals and Medical Centers
- Used between operating rooms and preparation areas
- Ensures safe and sterile instrument transfer
Static pass boxes are especially suitable for environments with moderate cleanliness requirements and controlled transfer needs.
How to Choose the Right Static Pass Box
When selecting a static pass box, consider the following key factors:
1. Size Selection
- Determine internal dimensions based on the size and quantity of items transferred
2. Material Requirements
- 304 stainless steel cost-effective and corrosion-resistant
- 316 stainless steel recommended for stricter hygiene and chemical resistance
3. Sealing Performance
- Ask for air-tightness test reports
- Ensure long-term stability of gaskets and door seals
4. Interlock System
- Choose between mechanical or electronic interlock systems
- Ensure reliable, long-term operation
5. Compliance & Certifications
- Check if the equipment meets GMP, ISO, or local cleanroom standards
6. Optional Functional Upgrades
- UV sterilization lamp
- Touchscreen control panel
- Automatic door options
- Internal shelving or tray systems
Selecting the right configuration ensures the equipment matches your cleanroom workflow.
Installation and Maintenance of Static Pass Boxes
Installation Considerations
- Must be installed directly on cleanroom partition walls
- Ensure airtight integration between the pass box and the wall
- Perform a leakage test after installation to verify sealing performance
Routine Maintenance
- Clean internal and external surfaces regularly
- Inspect door gaskets and replace if damaged
- Test interlock function to ensure safe operation
- Replace UV lamps periodically (if equipped)
Proper maintenance ensures stable performance and extends the lifespan of the equipment.
Conclusion
A Static Pass Box is a cost-effective and reliable solution for material transfer in controlled environments. It is especially suitable for facilities that require contamination control but do not need the higher airflow purification of dynamic pass boxes.
When purchasing a static pass box, consider its size, construction material, sealing performance, and available optional features. Working with a reputable supplier who provides strong technical support and after-sales service will ensure long-term, trouble-free operation.
Contact
Leave your information and we will contact you.
WhatsApp