Static and Dynamic pass through boxes for cleanroom
SR Air System is a leading Clean Room Passbox manufacturer and supplier, providing essential contamination control solutions for critical environments. Based in Ahmedabad, Gujarat, India, we specialize in designing and fabricating high-quality SS 304 Clean Room Pass Boxes (also known as Clean Room Pass Throughs).
Our pass boxes are engineered to facilitate the secure, sterile transfer of materials between controlled and uncontrolled areas, ensuring the pressure differential is maintained and preventing cross-contamination in your Pharmaceutical, Laboratory, or Healthcare facility.
Your Complete Range of SS Clean Room Passbox Solutions
At SR Air System, we manufacture a complete range of Pass Boxes designed to maintain the integrity of your cleanroom. From passive airlocks to active laminar flow units, our systems are built with 304-SS Jindal Stainless Steel to meet WHO-GMP and ISO Class 5 standards.


Dynamic Single Phase Pass Box
High-performance active laminar flow optimized for standard 230V single-phase industrial power setups.


Ss 304 Pass Box


3 Way Dynamic Pass Box
A specialized T-shape or L-shape unit allowing material transfer between three adjacent clean zones with a synchronized interlocking system.


Three Way Static Pass Box
Provides flexible, passive material access from three sides without disturbing room pressure; ideal for central laboratory hubs.


Ss Pass Box (Standard)
A durable, cost-effective solution for general hospital and laboratory use, featuring a seamless, easy-to-clean interior.


Rectangular Dynamic Pass Box
Features a wide-entry profile and deep chamber designed to accommodate large laboratory trays and bulky medical equipment.
Cleanroom Passbox Technical Specification
| Feature | Dynamic Models (Active) | Static Models (Passive) |
|---|---|---|
| Airflow Pattern | HEPA Filtered Laminar Flow | Passive Airlock (No Airflow) |
| Material (MOC) | SS 304 / SS 316 Jindal | SS 304 / SS 316 Jindal |
| Filtration Efficiency | 99.999% @ 0.3 Microns | N/A |
| Interlocking System | Electromagnetic / PLC Based | Mechanical / Electromagnetic |
| Sterilization | UV-C Germicidal Lamp (254nm) | UV-C Germicidal Lamp (254nm) |
| Typical Usage | Between Different Cleanliness Classes | Between Same Cleanliness Classes |
Technical Highlights & Design Features
- Airtight Construction: Precision-engineered doors with high-quality Silicon Gaskets provide a leak-proof seal against pressure differentials.
- Coved Corner Interiors: All units feature a seamless internal design with curved corners to prevent microbial growth and ensure easy disinfection.
- Safety Interlocks: Our interlocking mechanisms are rigorously tested to ensure only one door opens at a time, preserving your cleanroom’s air quality.
- Custom Dimensions: As an Ahmedabad-based manufacturer, we offer customized sizing to fit your specific wall thickness and cleanroom architecture.







