In cleanroom production and laboratory processes, the frequent transfer of small items through personnel airlocks can lead to numerous door openings, high cross-contamination risks, and reduced efficiency. The pass-through is precisely designed to address this core challenge as a static purification device, acting as a safe, efficient, and controlled material transfer station between areas of different cleanliness classes.
I. Core Functions: Safety Isolation and Efficient Transfer
1. Safety Isolation, Preventing Cross-Contamination
Working Principle: The doors on both sides of the pass-through are equipped with an electronic or mechanical interlock system, ensuring that when one door is open, the opposite door absolutely cannot be opened.
Customer Value: Effectively blocks direct airflow between different clean zones (e.g., corridor and core area) or between clean and non-clean areas, maintaining stable positive pressure and cleanliness integrity in the cleanroom.
2. Internal Self-Cleaning, Ensuring Transfer Quality
Working Principle: Most pass-throughs contain a High-Efficiency Particulate Air (HEPA) filter and a fan. After the doors are closed, the "self-cleaning" cycle can be activated, blowing away particles adhering to the items and purifying the chamber interior.
Customer Value: Provides a "mini-shower" for materials, ensuring contaminants are not carried into higher-classification clean areas. This is particularly crucial for applications with extremely high cleanliness requirements.
3. Process Optimization, Enhancing Work Efficiency
Working Principle: It creates a dedicated material transfer channel through the wall, allowing operators to transfer items quickly without the need for gowning and entry.
Customer Value: Significantly reduces the frequency of personnel entering and exiting the main cleanroom, saving time and lowering both the contamination risk associated with human traffic and the costs related to gowning.
II. Superior Materials and Performance: Built for Cleanliness and Durability
The material selection and design of our pass-throughs aim to meet the long-term, stable operational needs of cleanrooms.
| Component | Primary Materials & Performance | Core Advantages |
| Chassis | SUS 304 Stainless Steel (Primary choice) | Excellent corrosion resistance, easy to clean, dust-free, robust and durable. Fully complies with regulations like GMP. |
| Quality Cold-Rolled Steel Plate (Electrostatically painted) | Cost-effective, smooth surface, rust-proof and easy to clean. Suitable for cost-sensitive environments. | |
| Doors | Same material as the chassis, typically designed as sliding or swing-type, often with tempered glass view windows. | Good sealing, stable operation. The window allows visual confirmation of contents, preventing operational errors. |
| Sealing Gasket | Silicone Rubber or EPDM Rubber | Excellent sealing, aging resistance, and corrosion resistance, ensuring chamber airtightness and extending service life. |
| Filtration System | Pre-filter + HEPA filter, with ≥99.99% efficiency on particles ≥0.3µm. | Provides clean, purified airflow for the self-cleaning cycle, effectively removing particles. This is the core component ensuring transfer cleanliness. |
| Control System | Microprocessor-based intelligent control panel, featuring On/Off, Self-Clean, and optional UV Steriliztion functions. Clear status indicators. | Simple operation, customizable functions. Allows for integration with facility management systems. |
Key Performance Indicators:
Airtightness: Tight seal between door frame and door leaf, with very low leakage rates.
Self-Cleaning Effectiveness: Capable of achieving ISO Class 5 (Class 100) cleanliness or higher inside the chamber within a specified time (typically <2 minutes).
Interlock Reliability: 100% guaranteed prevention of simultaneous door opening, ensuring safety and security.
Noise Level: Low-noise fan operation for a quiet working environment.
III. Common Specifications and Configurations
Pass-throughs can be customized according to your specific needs. The following are common standard specifications for reference:
| Parameter | Common Specifications |
| Standard Dimensions (W x D x H) | 600x600x600mm, 700x700x700mm, 800x800x800mm (Custom sizes available) |
| Suitable For | Small tools, components, reagents, documents, etc. |
| Control Method | Mechanical Interlock / Electronic Interlock / Touchscreen Control |
| Optional Features | UV Germicidal Lamp (for surface sterilization before/after transfer), Audio-Visual Alarm (e.g., for improperly closed doors) |
| Installation Method | Recessed (Embedded into the wall, aesthetic and space-saving) / Surface Mounted (Fixed onto the wall, convenient and fast) |
The pass-through will become an indispensable key piece of equipment in your cleanroom management. We are ready to provide you with targeted selection advice and solutions.