Hebei Hong'an Fire Door Co., Ltd. is one of the most reliable manufacturers and suppliers of airtight door in China. If you're going to buy durable airtight door made in China, welcome to get free sample from our factory. All customized products are with high quality and low price.
An airtight door, also known as a gas-tight or hermetic door, is a precision-built closure solution engineered to block the transfer of air, moisture, dust, microorganisms, hazardous chemicals and radioactive particles between separate spaces. Unlike conventional industrial doors, this unit maintains stable pressure differentials indoors and satisfies strict air leakage standards, with a typical leakage rate kept below a specified threshold - for instance, no more than 0.25% of the room's total volume per hour under set pressure differences. It serves as a critical facility component for spaces that require consistent clean, sterile or hazard-isolated atmospheric conditions.
Key Features
High-Performance Sealing System
We adopt double or triple peripheral sealing with closed-cell foam gaskets made of EPDM or silicone material to deliver reliable barrier performance.
An optional inflatable gasket is available for scenarios requiring full air isolation. The gasket expands automatically once the door is closed to seal all micro gaps and retracts before door opening, enabling seamless operation and complete tightness.
Multi-point locking cams and over-center toggle handles work together to apply even compression force across the entire door frame, ensuring consistent sealing all around.
Robust Construction
The door leaf is crafted from heavy-gauge galvanized steel, 304/316L stainless steel or powder-coated carbon steel, with plate thickness ranging from 1.5mm to 3.0mm to suit different usage demands.
Internal anti-twist steel rib reinforcements enhance structural stability, while an optional mineral wool core delivers effective thermal insulation and noise reduction performance.
The door frame adopts full welding and continuous seam sealing technology, eliminating hidden air leakage paths thoroughly.
Advanced Pressure Control
The door can withstand differential pressures ranging from ±500Pa to ±5000Pa, with customized pressure resistance options available for special working conditions.
Its air tightness performance complies with Class 2 and Class 3 standards specified in EN 12207 for air permeability and ISO 10648-2 for glovebox tightness.
A optional pressure equalization valve can be installed to facilitate smooth door opening and closing in environments with large pressure differentials.
User-Friendly Operation
Multiple latching options are provided, including single-lever, double-lever and handwheel mechanisms, with standard non-locking design and optional key locking for safety management.
Self-closing hinge configurations are available, which automatically close the door via spring torque to maintain consistent sealing status.
The door opens and closes smoothly and quietly with minimal operating force, ideal for areas with frequent pedestrian and trolley passage.
Advantages & Benefits
|
Advantage |
Benefit |
|
Superior containment |
Effectively prevents cross-contamination between clean areas and hazardous zones, covering BSL-3/BSL-4 laboratories, pharmaceutical isolation facilities and chemical storage rooms. |
|
Energy efficiency |
Greatly reduces conditioned air leakage and lowers HVAC system load. For pressure-controlled facilities, it can deliver 15-25% energy savings compared with ordinary industrial doors. |
|
Low maintenance |
EPDM gaskets feature excellent resistance to ozone, UV rays, chemical corrosion and extreme temperatures (-40°C to +120°C). Inflatable seals can be replaced on-site without removing the entire door, simplifying daily maintenance. |
|
Customizable fit |
Available in diverse sizes, including single-leaf (800×2000mm) and double-leaf (2400×3000mm) specifications, adaptable to most existing door openings. Multiple surface finishes are optional, such as antimicrobial coating, acid-resistant epoxy and food-grade white coating. |
|
Compliance ready |
Designed and manufactured to meet mainstream industry standards including GMP, EU GMP Annex 1, ISO 14644 for cleanrooms, ASME AG-1 for nuclear industries and NFPA 99 for healthcare facilities. Official factory leakage test reports are provided for each product. |
Typical Applications
Pharmaceutical & Biotech
Aseptic filling workshops, sterility testing isolation rooms, tablet coating production areas.
Healthcare
Operating rooms, airborne infection isolation wards, bone marrow transplant units.
Laboratories
BSL-2/3/4 laboratories, chemical fume hood rooms, animal research laboratories.
Food & Beverage
High-hygiene production zones such as dairy processing and ready-to-eat food packaging workshops that require stable positive pressure environments.
Industrial Manufacturing
Electronic clean production workshops, battery dry rooms with dew points below -40°C, powder processing and handling areas.
Hazardous Containment
Radiochemical laboratories, toxic gas storage rooms, pharmaceutical cytotoxic production suites.
Quality & Certification
Our airtight doors are produced in strict accordance with the ISO 9001:2015 quality management system. Every single door undergoes independent on-site leakage testing via SF₆ tracer gas or blower-door testing methods, with a formal signed test report supplied upon delivery. Third-party witness testing services are also available on request.
If you are looking for durable, code-compliant and high-performance airtight door solutions to protect your production processes, products and on-site personnel, our airtight doors deliver reliable and long-lasting performance.
Contact our professional technical team today to get free customized size selection and pressure differential calculation solutions based on your cleanroom or hazardous area operation requirements.
Hot Tags: airtight door, China airtight door manufacturers, suppliers, factory, Armour Guard Doors, Blast Resistant Door, Explosion Proof Airtight Door, explosion proof door, Explosion Relief Door, Steel Explosion Proof Door
