Static Pass Box
Static Pass Box | Transfer Hatch
The static pass box(also known as transfer hatch) is the most cost-effective pass box solution, which allows materials to be transferred between clean zones without personnel movement, reducing the risk of cross-contamination.
Working principle of static pass boxes is they are fitted with interlocking system(mechanical or electromagnetic type), that means when one of doors is open, another door is not allowed to be opened at the same time. Further, UV lights are equipped to sterilize the bacteria on the surface of materials.
As an experienced static pass box manufacturer in China, we can customize based on special requirements. Please send us your specifications to tailor static pass box solutions.
Static Pass Box Specifications
| Model | SPB-500 | SPB-600 | SPB-800 |
| External Size(W*D*H) mm | 650*560*680 | 750*650*780 | 950*850*980 |
| Internal Size(W*D*H) mm | 500*500*500 | 600*600*600 | 800*800*800 |
| Main Body Material | Stainless Steel / Painted Galvanized Steel | ||
| Interlocking System | Mechanical / Electromagnetic Type | ||
| Door Type | 2 Doors / 3 Doors | ||
| Mounted Type | Wall Mounted / Floor Mounted | ||
| UV Light | Yes | ||
| Customized design for size, material, and other specifications is available, click the button below for asking a tailored solution. | |||
Structure
1. Recessed Flush Door 2. View Glass 3. Interlock System 4. Sanitary Sealing Strip 5. Control Panel 6. UV Light
Features
- Doors adopt recessed and flush design for cleaning easily without collecting dust.
- The material of pass box body are optional with high quality stainless steel and painted cold-rolled steel.
- The interiors of pass box adopt coving design, which is smooth and easy to clean.
- Interlocking system are equipped to prevent from cross-contamination, mechanical and electromagnetic type can be options.
- Wall mounted or floor mounted installation method are available based on requirements.
- Sanitary sealing strips are equipped to ensure airtightness.
- Micro-computer control panel makes operation easily.
- Comply with GMP and ISO 14644 standards.
Static Pass Boxes Manufacturer-The Complete FAQ Guide
Learn more about the static pass box with this guide. We prepare some questions and answers for you.
- What Is A Static Pass Box?
- Can Static Pass Boxes Be Used Between Clean Zones of Different Classes?
- What Are the Application Scenarios for Static Pass Boxes?
- What Are the Main Types of Interlocking Systems for Static Pass Boxes?
- How Is A Static Pass Box Installed?
- Why Choose KINROM Pass-Through Boxes?
- What Parameters Are Required to Get A Quotation for A Static Pass Box?
What Is A Static Pass Box?
A static pass box is a fundamental cleanroom transfer device that relies exclusively on physical isolation and an interlocking system to facilitate the movement of materials. Its operation is characterized by the following key aspects:
Core Principle: It utilizes a mechanical or electronic interlock to ensure both doors are never open simultaneously, creating a physical barrier that prevents air exchange between adjacent areas.
Primary Function: To provide a basic, yet highly reliable, barrier against cross-contamination during material transfer.
Key Distinction: Unlike dynamic pass boxes or air shower pass-through boxes, it contains no fans, HEPA filters, or any active air purification components.
Typical Application: It is specifically designed for use between areas of the same or very similar cleanliness classification, where the primary requirement is isolation rather than an improvement in the cleanliness of the items being transferred.
Picture 1 Static Pass Box
Can Static Pass Boxes Be Used Between Clean Zones of Different Classes?
No, it is not recommended and generally prohibited. Static pass boxes should only be used between clean zones of the same classification. This restriction is due to their fundamental design limitation: the complete lack of active purification capability.
Using a static pass-through to connect areas of different cleanliness levels poses a significant contamination risk for the following critical reasons:
Cannot Handle Contaminant Transfer: Materials transferred from a lower-classification area carry dust and microorganisms on their surfaces. The static pass-through box has no mechanism (like HEPA filtration) to remove these contaminants, allowing them to be directly introduced into the higher-classification zone, causing cross-contamination.
Ineffective Against Surface Pollution: While the interlock system prevents bulk air exchange, it does nothing to address the surface contamination on the items themselves. Introducing items from a less clean area can directly compromise the stringent environment of the critical clean zone.
What Are the Application Scenarios for Static Pass Boxes?
Static pass boxes provide cost-effective contamination control for material transfer between environments with equivalent cleanliness levels. Their key applications include:
1. Industrial Applications
Electronics: Transfer of packaging, garments, and tools in semiconductor/LCD facilities
Precision Manufacturing: Component and jig transfer in assembly areas
2. Internal Clean Zone Buffers
Connections between main production areas and auxiliary spaces (storage, tool rooms)
Maintains isolation while allowing material flow within same-cleanliness zones
3. Non-Sterile Industries
Food & Beverage: Dry materials and packaging transfer
Cosmetics: Packaging components for non-sterile products
What Are the Main Types of Interlocking Systems for Static Pass Boxes?
Static pass boxes utilize two primary interlocking systems, each with distinct characteristics and applications:
1. Mechanical Interlock
Operation Principle: Uses purely mechanical components (links, levers, latches) to physically prevent both doors from opening simultaneously. Requires no electrical power.
Advantages:
High Reliability: Immune to power outages or circuit failures.
Intrinsic Safety: Suitable for explosion-proof environments (no electrical components).
Disadvantages:
Fixed Operation Force: Requires consistent manual effort.
Potential Wear: Mechanical parts may experience wear over time, potentially leading to reduced interlock precision.
2. Electronic Interlock
Operation Principle: Employs sensors and electromagnetic locks controlled by a circuit. Automatically locks the opposite door when one is opened, often with status indication.
Advantages:
User-Friendly: Smooth operation with clear status feedback.
Enhanced Alerts: Can integrate visual/audible alarms for improper door sequencing.
Disadvantages:
Power Dependency: Requires continuous power supply; fails during outages unless backed up.
Explosion Hazard: Not suitable for hazardous areas where electrical sparks pose a risk.
How Is A Static Pass Box Installed?
Why Choose KINROM Static Pass Boxes?
KINROM static pass boxes are engineered with precision and technical excellence to deliver superior performance in basic material transfer applications. Here are the key technical advantages:
1. Advanced Structural Integrity
Material Specification: Constructed with 304 or 316L stainless steel, featuring a low surface roughness (Ra ≤ 0.8 µm) for optimal cleanability
Structural Design: Reinforced frame construction with continuous welding and radiused corners (R≥30mm) ensures structural stability and prevents particle accumulation
Panel Technology: Standard 1.2mm thickness with optional 1.5mm reinforcement for enhanced durability
2. Precision Interlocking Systems
Mechanical Interlock: Utilizes precision-machined stainless steel components with wear-resistant coatings, achieving >100,000 cycle durability
Electronic Interlock: Features Hall-effect sensors and fail-safe electromagnetic locks with response time <100ms, integrated with building management systems via dry contact outputs
3. Superior Sealing Performance
Multi-stage Sealing: Triple-layer silicone gaskets with continuous compression design
Air Tightness: Maintains leakage rate <0.1% at standard operating pressure differentials
Long-term Stability: Gasket materials rated for >10 years service life under continuous compression
4. Precision Manufacturing
Dimensional Accuracy: ±1mm tolerance control across all critical dimensions
Surface Finish: Electropolished or mechanical polished options available.
Modular Design: Standardized components with flexible configuration options
5. Technical Compliance
Standards Compliance: Designed and manufactured in accordance with ISO 14644, GMP, and relevant cleanroom standards
Quality Assurance: Full material traceability with 100% factory testing and certification
6. Custom Engineering Capabilities
Non-standard Applications: Custom sizes, special material requirements, and unique configuration solutions
Integration Ready: Prepared for integration with facility monitoring systems and cleanroom automation
What Parameters Are Required to Get A Quotation for A Static Pass Box?
To receive a precise and timely quotation for KINROM static pass boxes, please provide the following four essential technical parameters:
1. Dimensions
Internal dimensions (Width × Depth × Height in mm)
2. Material Specification
Painted galvanized steel, 304 or 316L stainless steel
3. Interlock Type
Mechanical interlock or electronic interlock
4. Quantity
Number of units required for initial purchase
Providing these core parameters will enable us to generate a comprehensive quotation within 24 hours. Our technical team is ready to review your requirements and provide optimized configuration suggestions.
