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In-depth Analysis of Automatic Airtight Doors: Core Technology & Selection Guide for Operating Rooms and Cleanrooms – From Sealing Principle to Project Implementation
release time:
2026-08-10
# In-depth Analysis of Automatic Airtight Doors: Core Technology & Selection Gui
# In-depth Analysis of Automatic Airtight Doors: Core Technology & Selection Guide for Operating Rooms and Cleanrooms – From Sealing Principle to Project Implementation
Automatic airtight doors rely on a closed-loop sealing structure to control indoor pressure differentials. They are special door and window products exclusively for operating rooms, negative-pressure wards, biological laboratories and pharmaceutical clean workshops. Their airtight performance directly governs the effectiveness of hospital infection prevention and control as well as the pass rate of cleanliness classification acceptance.
Shanghai Tangchenrui Door Industry has independently developed three generations of self-adaptive sealed automatic airtight doors supported by intelligent sheet metal production lines. The product parameters are benchmarked against the international airtight standard EN1026, and the company holds complete fire protection and medical product test certifications. We elaborate on the product selection criteria based on practical experience accumulated from thousands of medical cleanroom projects.
## I. Two Mainstream Structures of Automatic Airtight Doors and Their Application Scenarios
1. Drop-down Automatic Airtight Doors
The door leaf sinks integrally when closed to compress the full-perimeter silicone sealing strips. Air leakage volume is ≤48m³/h per square meter under a pressure differential of 125Pa. It is mainly applied in operating rooms of Grade A Tertiary Hospitals and P2/P3 biological laboratories. Tangchenrui equips these doors with standard radar sensor + foot sensor dual triggering, infrared anti-pinch protection and remote fault early warning system, with the motor’s mean time between failures (MTBF) exceeding 50,000 operating hours.
2. Side-compression Automatic Airtight Doors
This cost-effective model fits general outpatient treatment rooms, nucleic acid testing cabins and small clean testing laboratories. Its sealing performance meets conventional negative pressure requirements of ±50Pa, and multiple opening modes such as card swiping and facial recognition are available.
## II. Fundamental Differences Between Automatic Airtight Doors and Ordinary Automatic Doors
Ordinary glass automatic doors only serve as partitions for dust isolation without pressure differential sealing function. In contrast, automatic airtight doors adopt a full-perimeter gap-free sealing design to block air convection and cross-contamination of pathogens, which are mandatory installations for clean spaces. Many small engineering contractors improperly replace airtight doors with ordinary automatic doors, resulting in failed cleanliness acceptance for hospitals.
## III. Matching Solution: Combined Door Sets for Airtight Spaces
Install automatic airtight doors at the main entrances of operating rooms, match steel medical doors for adjacent buffer rooms, and deploy stainless steel fire-resistant special doors for equipment machine rooms. Tangchenrui provides one-stop supply, unified installation and commissioning for the complete door assembly, eliminating errors caused by coordination among multiple suppliers. This has become the mainstream configuration for large and medium-sized hospitals.
Tangchenrui can customize differentiated airtight parameters according to cleanliness classes (Class 10,000 / Class 1,000 / Class 100) and provide free on-site surveys with tailored door assembly solutions.
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