Laminar Flow Pass Box
Core Principle: Laminar flow pass box uses fan & high-efficiency filter to circulate purified air, maintain cleanliness and avoid cross-contamination; built-in UV lamp realizes thorough sterilization.
Body Material: Premium 304 stainless steel housing with rounded corners, convenient for daily cleaning.
Detection Configuration: Fitted with PAO test port and differential pressure gauge for filter inspection and real-time status monitoring.
Intelligent Control: Touch screen supports time setting, sterilization time query and reset for easy operation.
Auto Operation: Automatic door interlock, countdown locking, timeout reminder and timed UV lamp shutdown.
Sealing Upgrade: Groove-type door gasket, more durable and better airtightness than glued type.
- Product Description
Laminar Flow Pass Box - Advanced Cleanroom Transfer Solution
When you require to keep up strict defilement control between cleanrooms, our Laminar Flow Pass Box gets to be your fundamental accomplice. Fabricated by Luoyang Youken Laboratory Equipment in our 30,000 m² generation office, each unit highlights premium 304 stainless steel development with adjusted corners for easy cleaning. Our building group of 100 experts has outlined this progressed exchange framework to provide ISO Course 5 discuss virtue through H14 HEPA filtration with 99.995% efficiency.
The coordinates fan-filter unit gives nonstop vertical wind current at 0.45 m/s, promptly cleansing any particles presented amid fabric exchange. You'll advantage from cleverly touch-screen controls, programmed entryway interlocks, and real-time differential weight checking through the built-in PAO test harbour. With certifications counting ISO, CE, SEFA, and SGS, you can believe this arrangement for pharmaceutical, semiconductor, and biosafety applications where cross-contamination is essentially not an option.

How It Works: The Science Behind Contamination Control
Your materials pass through a self-cleaning wind current zone each single time. The Laminar Flow Pass Box employments a effective fan and high-efficiency channel framework to circulate decontaminated discuss ceaselessly, making a defensive boundary that keeps up cleanliness between diverse review areas.
When you open one entryway, the mechanical or electromagnetic interlock consequently anticipates the other from opening. This guarantees dependable segregation between your clean zones. The built-in UV light gives careful surface sterilization as an extra security measure.
The touch screen lets you set sterilization times, check operation history, and reset parameters with basic taps. Commencement locking anticipates untimely opening, whereas programmed timeout updates and coordinated UV shutdown secure your prepare judgment without consistent monitoring.
Technical Specifications
| Parameter | Specification |
|---|---|
| Body Material | Full 304 Stainless Steel Plate |
| Filter Type | H14 HEPA (99.995% efficiency) |
| Airflow Velocity | 0.45 m/s ± 20% |
| Cleanliness Level | ISO Class 5 / Grade A |
| Noise Level | <65 dB |
| Control System | Intelligent Touch Screen |
| Interlock Type | Mechanical/Electromagnetic |
| Door Gasket | Groove-type sealing |
| Testing Port | PAO test port with differential pressure gauge |
| Sterilization | Built-in UV-C lamp |
| Corner Design | Large-radius coved corners |
| Housing Structure | Double-walled construction |
| Size Options | Fully Customizable |
| Wiring Options | Top or side entry available |
Key Features That Protect Your Process
Interlock Safety System: You never have to stress almost synchronous entryway opening. Our mechanical and electromagnetic interlocks work together to guarantee solid segregation and anticipate any plausibility of cross-contamination between your cleanroom zones.
Effortless Sanitization: The consistent bended inward space kills dead corners totally. You can clean each surface rapidly and completely, assembly the strictest GMP approval conventions without battling with hard-to-reach areas.
Leakproof Double-Wall Plan: The negative weight structure between dividers avoids any discuss spillage. Your weight differentials stay steady, and unfiltered discuss essentially cannot enter the decontaminated chamber.
Durable Development: Corrosion-resistant stainless steel handles forceful cleaning operators without debasement. The tempered glass windows give clear perceivability whereas withstanding day by day operations in requesting environments.
Flexible Arrangement: Select from different styles, glass entryway sorts, and wiring positions. Whether you require beat passage for ceiling-mounted conduits or side wiring for divider establishments, we customize each unit to fit your office format superbly.

Quality Assurance: What We Test So You Don't Have To
Every Laminar Flow Pass Box undergoes rigorous validation before reaching your facility. Our quality control process focuses on five critical inspection points that determine real-world performance.
HEPA Filter Integrity Testing: We perform DOP/PAO aerosol testing on every filter and frame seal. This ensures zero pinhole leaks that could compromise your cleanroom classification.
Airflow Velocity Mapping: Our technicians measure 5-9 points across the working area to verify stable 0.45 m/s downward flow. Uniform velocity distribution means consistent particle removal across the entire transfer surface.
Particle Counting Validation: Dynamic particle counting confirms the internal chamber achieves ISO Class 5 even during active material transfer. Your materials move through truly clean air, not just filtered air.
Recovery Time Testing: We measure how quickly the unit purges a 100:1 particle concentration challenge. Most units achieve complete recovery within 60 seconds, ensuring rapid turnaround between transfers.
Pressure Differential Monitoring: Continuous verification that the internal plenum maintains positive pressure relative to surrounding areas. This prevents any unfiltered air from entering during operation.

Real-World Applications Across Critical Industries
Pharmaceutical Sterile Fill-Finish: Transfer sterilized vials or API containers from Grade C preparation areas into Grade B/A aseptic filling suites. Active cleaning removes particles immediately, maintaining the sterility chain from preparation through filling.
Semiconductor Lithography: In nanotech facilities handling silicon wafers, even sub-micron particles cause catastrophic yield loss. The laminar airflow sweeps away any introduced particles before they can settle on wafer surfaces during zone-to-zone transfer.
Biosafety Laboratories (BSL-3/BSL-4): Safely transfer biological samples between containment levels. Many units integrate VHP (Vaporized Hydrogen Peroxide) sterilization ports to handle high-pathogen materials while maintaining strict pressure barriers that protect laboratory personnel.
Food & Cosmetic GMP Facilities: Maintain product purity during packaging operations. The continuous airflow prevents environmental contaminants from reaching finished products during transfer from processing to packaging zones.
Frequently Asked Questions
Q: How does your unit differ from a standard Dynamic Pass Box?
A: Our product guarantees unidirectional airflow at precisely controlled velocity. Standard dynamic pass boxes may use turbulent airflow that doesn't provide the same consistent particle removal or predictable cleaning performance.
Q: When should I replace the HEPA filter?
A: Replace the filter when pressure drop across it exceeds double the initial reading, or when air velocity falls below 0.35 m/s despite fan adjustment. The built-in differential pressure gauge makes monitoring simple.
Q: Can you integrate the unit into our Facility Monitoring System?
A: Absolutely. Our professional units include RS485 or Modbus interfaces that provide real-time monitoring of differential pressure, fan status, and interlocking alarms. Your facility management system receives continuous status updates.
Q: Is the UV lamp sufficient for sterilization?
A: UV-C lamps provide excellent surface disinfection between transfers. However, your primary contamination control comes from the HEPA-filtered laminar airflow that actively removes airborne particulates during material passage.
Q: Why is the coved corner design important?
A: Coved corners prevent microbial accumulation in 90-degree joints, making cleaning validation much simpler. GMP protocols require proof that every surface can be effectively cleaned, and our large-radius corners eliminate hard-to-reach areas completely.
Q: What maintenance schedule do you recommend?
A: Check the differential pressure gauge weekly. Clean interior surfaces according to your facility's cleaning validation protocol. Schedule professional filter integrity testing annually or whenever pressure readings change significantly.
Why Choose Luoyang Youken for Your Cleanroom Needs
With over 30,000 square meters of manufacturing space and a dedicated team of 100 professional engineers, we deliver more than equipment—we provide complete cleanroom solutions. Our comprehensive product portfolio covers everything from laboratory benches and Fume Hoods to specialized cleanroom equipment.
You benefit from our certifications across ISO, CE, SEFA, and SGS standards. We understand the demanding requirements of pharmaceutical, medical, research, and semiconductor environments because we've supplied facilities worldwide.
Our one-stop approach means you work with a single trusted partner for laboratory furniture, hospital furniture, and cleanroom equipment. From project planning through installation, we simplify procurement while ensuring every component meets international quality standards.
Ready to Upgrade Your Cleanroom Transfer Process?
Contact Us today at ceo@ukenlab.com to discuss your specific requirementd for Laminar Flow Pass Box.











