This 304 stainless steel pass box is designed for cleanrooms, laboratories, and controlled environments, offering a seamless, smooth surface to prevent dust accumulation and ensure maximum cleanliness. It is equipped with double-layer glass windows for clear visibility and safety during operations.

Key Functions:

• Mechanical/Electronic Interlock Options: Unidirectional airflow control with “double interlock” prevents both doors from opening simultaneously, reducing contamination risks.
• Optional HEPA Filter: High-efficiency (≥99.97%) HEPA filter makes it suitable for biosafety labs, electronics cleanrooms, and pharmaceutical applications.
• Durable Materials: Internal surfaces made of polished stainless steel for smoothness and wear resistance; external cabinet made from cold-rolled steel or stainless steel with baked finish.
• Easy Maintenance & Operation: Simple structure, convenient handling, and long-lasting performance.
• Special Sealing Strips: Ensures airtightness and maintains controlled cleanroom conditions.
• Multiple Sizes & Customization: Standard sizes from 400×400×400 mm to 800×800×800 mm; non-standard dimensions are available upon request.

• Adopted bulge gate design for stability
• Smooth, polished work area with wear-resistant stainless steel plate
• Two-sided doors with mechanical interlock to prevent simultaneous opening
• Optional accessories: electronic interlock, ultraviolet germicidal lamp, walkie-talkie

Note: Custom sizes are available for non-standard applications.

Ideal for clean environments, including:

• Micro-electronics and precision instruments
• Laboratories and biosafety facilities
• Pharmaceutical and biopharming industries
• National defense and opto-electronics
• Aseptic packaging and other controlled environments

Q1: What is the “double interlock” function?
A: Prevents both doors from opening simultaneously to maintain cleanliness and avoid contamination.

Q2: Does a stainless steel pass box require a HEPA filter?
A: Dynamic pass boxes require HEPA filters (≥99.97%), while static pass boxes do not.

Q3: Which industries use pass boxes?
A: Pharmaceuticals, hospitals, laboratories, food processing, electronics/semiconductors, and more.

Q4: How to choose the size of a pass box?
A: Select based on item dimensions. Standard sizes range from 400×400×400 mm to 800×800×800 mm, with custom options available.