I. Definition and Overview

A Sliding Door Air Shower is a specialized cleanroom entry system designed to remove particulate contaminants from personnel or materials entering controlled environments. It uses high-velocity, HEPA (High-Efficiency Particulate Air) or ULPA (Ultra-Low Penetration Air) filtered airflow to minimize contamination, ensuring a sterile and particle-free transition between areas.

Sliding door air showers are critical in facilities adhering to international standards such as ISO 14644-1: Cleanrooms and associated controlled environments and GMP (Good Manufacturing Practice).

II. Working Principle

The sliding door air shower operates using a controlled airflow and filtration system:

• Air Circulation: High-velocity air jets are directed vertically and horizontally to dislodge particles from clothing and equipment.
• Filtration System: Air passes through HEPA/ULPA filters to maintain particle-free discharge.
• Cross-Contamination Prevention: Interlocked sliding doors prevent simultaneous opening, ensuring that contaminated air does not enter the cleanroom.
• Automatic Control System: Microprocessor-based control with touch-screen interface, timing settings, and alarm notifications ensures consistent operation and compliance with cleanroom protocols.

III. Main Functions and Roles

• Removes particulate contaminants from personnel and materials before entering controlled environments.
• Reduces cross-contamination and protects sensitive processes.
• Ensures compliance with global cleanroom standards (ISO 14644, GMP, FDA).
• Enhances operational efficiency and safety in critical industries.

IV. Structural Features and Materials

Sliding door air showers are built from durable, corrosion-resistant materials:

• Stainless Steel (SS304/SS316): Resistant to chemicals, easy to disinfect.
• Powder-Coated Steel: Economical with anti-corrosion properties.
• Aluminum Alloy: Lightweight and durable frame options.
• Tempered Glass Panels: Provide visibility and safety protection.
• Automatic Sliding Doors: Equipped with interlock mechanisms to prevent simultaneous opening.

V. Classification and Technical Parameters

VI. Typical Application Industries

• Cleanroom Engineering & Construction
• Medical and Hospital Engineering
• Biotechnology & Pharmaceutical Manufacturing
• Laboratory Equipment & Research Facilities
• Environmental Science & Green Technology
• Semiconductors, Electronics, and Precision Manufacturing

VII. Installation and Usage Considerations

• Install in ISO-classified environments in compliance with ISO 14644-1.
• Follow GMP guidelines for pharmaceutical or medical applications.
• Ensure proper interlock functionality to prevent both doors from opening simultaneously.
• Train operators on correct entry and exit procedures for contamination control.

VIII. Maintenance and Care

• Regular Cleaning: Clean interior surfaces and air nozzles with approved disinfectants.
• Filter Replacement: Replace HEPA/ULPA filters according to usage, typically every 6–12 months.
• Calibration: Annual calibration of airflow sensors and timer systems.
• Inspection: Check sliding door interlocks, alarms, and structural components periodically.
• Disinfection: Apply UV sterilization if available and perform chemical disinfection regularly.

IX. Conclusion

Sliding door air showers are essential equipment for controlled environments, providing effective contamination control and ensuring compliance with international cleanroom standards. Their application in engineering, biotechnology, healthcare, and electronics industries safeguards products, processes, and personnel while improving operational efficiency and quality assurance.