Cleanroom Swing Doors — Hermetic Single & Double Leaf Door Systems
The cleanroom swing door is the most frequently used — and most frequently compromised — boundary in any pharmaceutical or controlled environment. Every opening and closing cycle is an opportunity for differential pressure to be lost and unfiltered air to enter. Metrolabs designs, supplies, and installs precision-engineered hermetic cleanroom swing doors in GI, SS 304, and SS 316L that maintain Class 4 air leakage (<1 m³/h) and restore pressure differential within seconds of closing.
Why a Cleanroom Swing Door Is Not a Standard Commercial Door
A standard swing door has gaps at every edge — head, sides, and floor — through which air, particles, and microbial contamination flow freely. A cleanroom hermetic swing door engineers a positive seal at every edge, every closing cycle, without any manual action by the user.
Automatic Drop Seal — The Floor Gap Solution
The most critical feature of any hermetic swing door is the automatic drop seal. Driven by the door leaf’s own closing momentum, a mechanical mechanism deploys a rubber or brush seal to the floor surface the instant the door closes. When the door opens, the seal retracts automatically to clear the floor. Standard fire or acoustic doors have a permanent floor gap of 6–10mm that allows continuous air leakage regardless of the door position.
Perimeter Brush + Compression Seal System
A continuous brush seal on the head and both vertical jambs provides primary air leakage resistance, while a secondary compression seal on the door stop provides back-up containment. Together they achieve Class 4 air leakage performance (<1 m³/h at 4 Pa) — the certification standard for pharmaceutical cleanroom doors. Standard fire doors achieve Class 3 at best (4 m³/h) under the same conditions.
Flush Vision Panel — No Particle-Trapping Ledge
Standard framed vision panels have a stepped rebate on both faces where the frame meets the glass — a particle-trapping ledge that cannot be cleaned. Our flush-mount vision panel system brings the glass flush with the door face on the cleanroom side, eliminating the ledge entirely. The result is a smooth, fully wipeable surface that meets ISO 14644 cleanroom surface requirements.
Hydraulic Auto-Closer — Every Cycle
A cleanroom door that relies on personnel to close it fully will inevitably be left ajar. A calibrated hydraulic auto-closer ensures the door returns to the full seal position every single time — with adjustable closing speed to prevent slam damage and controlled latching force to compress the perimeter seal fully at every cycle.
Six Cleanroom Swing Door Configurations
Metrolabs supplies cleanroom swing doors in six standard configurations — each optimised for a different opening size, traffic pattern, and cleanroom grade:
Single Leaf Swing Door
The standard cleanroom access door for personnel and small equipment transit. Available in widths from 900mm to 1200mm and heights from 2100mm to 2400mm. Single hermetic leaf with full-perimeter brush seal, automatic drop seal, flush vision panel, and hydraulic closer. Suitable for ISO Class 5–8 pharmaceutical, food, and laboratory cleanrooms. GI, SS 304, and SS 316L frame and leaf options.
Double Leaf (Bi-Parting) Swing Door
Two hermetic leaves opening from a central meeting stile — for wider openings required by equipment transit, trolley traffic, and bulky material movement. Each leaf carries its own perimeter seal and auto-closer. The meeting stile incorporates an interlocking astragal seal to eliminate the central gap between leaves. Available in combined clear widths from 1400mm to 2400mm for wide cleanroom bays.
SS 316L Sterile-Grade Swing Door
Grade 316L stainless steel frame, leaf, and hardware — electro-polished to Ra < 0.5 μm on all cleanroom-facing surfaces. VHP and hydrogen peroxide decontamination resistant. Designed for Grade A/B aseptic manufacturing airlocks, injectable fill-finish suites, and sterile processing departments where all surfaces must withstand repeated aggressive disinfection cycles including oxidizing agents.
Interlocked Airlock Swing Door Pair
Two hermetic swing doors connected to an electro-mechanical interlock controller — ensuring only one door can be open at any time in the airlock. Used in pharmaceutical airlocks, gowning rooms, and pressure buffer zones between GMP grades. Interlock controller provides traffic light status display, audio alert on simultaneous opening attempt, and 21 CFR Part 11-compliant data logging of every door event for GMP audit trails.
Access-Controlled Swing Door
Hermetic swing door with integrated electronic access control — card reader, PIN pad, or biometric scanner — ensuring only authorised personnel can enter specific cleanroom grades. Magnetic lock (maglock) or electric strike release with fail-safe battery backup. Suitable for Grade A/B aseptic suites, controlled substance storage areas, and classified cleanrooms requiring documented personnel access records.
Half-and-Full Leaf Swing Door
A combined half-leaf (for routine personnel access) and full-leaf (for equipment, trolleys, and material transit) configuration in a single frame. The half-leaf provides a smaller active opening that minimises air disturbance during routine personnel transit. The full leaf can be unlatched and opened for larger items. Both leaves are hermetically sealed when closed. Ideal for pharmaceutical production entries with mixed pedestrian and equipment traffic.
Three Material Options — Matched to Your ISO Class
The frame and leaf material of your cleanroom swing door is selected based on the ISO class, chemical wash-down regime, and regulatory requirements of the cleanroom zone it serves:
Galvanised Iron (GI) — Epoxy-Painted
CRCA steel door leaf and frame with epoxy polyester powder coating in white or RAL colour. The most economical hermetic door solution for ISO Class 6–8 pharmaceutical QC labs, food processing cleanrooms, and general industrial controlled environments where aggressive chemical wash-downs are infrequent.
Stainless Steel 304 — #4 Brushed
SS 304 frame and door leaf in #4 brush finish for pharmaceutical production, food manufacturing, and hospital facilities requiring a fully washable, corrosion-resistant door. Resistant to standard laboratory disinfectants, caustic cleaning agents, and dilute acids. Suitable for ISO Class 5–7 GMP-regulated cleanrooms with daily chemical wash-down protocols.
Stainless Steel 316L — Electro-Polished
SS 316L frame, leaf, hinges, and hardware — all electro-polished to Ra < 0.5 μm on cleanroom-facing surfaces. For Grade A/B aseptic suites, injectable fill-finish areas, and critical cleanroom zones where VHP decontamination, H₂O₂ vapour, and chlorine dioxide sterilization are routine. Every component that enters the cleanroom zone is SS 316L — no mixed metals that could harbour contamination at dissimilar metal junctions.
Cleanroom Swing Doors Across Every Regulated Application
Pharmaceutical Production
GMP-grade hermetic swing doors for tablet, capsule, injectable, and API production zones — WHO, EU Annex 1, and US-FDA compliant.
Aseptic & Sterile Suites
SS 316L electro-polished interlocked airlock doors for Grade A/B aseptic manufacturing, lyophilization, and fill-finish areas.
Hospital Operating Theatres
Hermetic swing doors for surgical suites, NICU, ICUs, sterile processing (CSSD), and isolation rooms in hospital controlled environments.
Food & Beverage Production
GI or SS 304 hermetic doors for FSSAI and HACCP-compliant food manufacturing cleanrooms and high-care processing areas.
Microbiology & BSL Labs
Interlocked hermetic swing doors for BSL-2 and BSL-3 containment laboratories — maintaining containment during personnel transit.
Electronics Cleanrooms
ESD-safe hermetic swing doors with anti-static vision panels for ISO 5–7 semiconductor and precision electronics assembly cleanrooms.
Biotech & Cell Culture
SS 316L hermetic doors for cell therapy, gene therapy, and biologic manufacturing cleanrooms — VHP decontamination compatible.
NABL & Research Labs
Single and double hermetic swing doors for NABL-accredited testing laboratories and controlled environment research facilities.
Metrolabs Hermetic Swing Doors vs. Standard Commercial Doors
The performance gap between a hermetic cleanroom swing door and a standard fire or acoustic door is enormous — and the consequences of using the wrong door in a cleanroom are severe:
Class 4 Air Leakage — Certified Performance
Our hermetic swing doors achieve <1 m³/h at 4 Pa — tested and certified to EN 12207 Class 4. Standard commercial doors achieve Class 3 or lower (4–8 m³/h), making it impossible to maintain the cleanroom pressure cascade through standard door openings.
Single Supplier — Complete System
Metrolabs supplies doors, frames, closers, vision panels, kick plates, interlock controllers, and access control systems — all from one source, ensuring full compatibility between components and single-point accountability for system performance.
Air Leakage Test Report at Handover
Every Metrolabs hermetic swing door installation is commissioned with an air leakage test. The test result — confirming Class 4 performance at site conditions — is included in the IQ documentation package delivered at project handover.
Interlock and Access Control Integration
Our door controllers integrate seamlessly with building management systems, HVAC controls, and pharmaceutical manufacturing execution systems (MES) — providing real-time door status monitoring and audit trail data from a single platform.
Hermetic Swing Door vs. Standard Commercial Door
From Specification to Commissioned Hermetic Door
Metrolabs manages the complete supply and installation of your cleanroom swing doors — from specification through on-site commissioning:
Door Schedule & Specification
Each door opening is scheduled: size, material, vision panel, hardware, seal system, interlock requirements, and access control. Every door is matched to its ISO class and GMP grade.
Factory Manufacture
Doors and frames are precision-manufactured to the approved schedule. SS 316L units electro-polished and inspected. All hardware pre-assembled and function-tested before delivery.
Frame & Door Installation
Frames installed plumb and square in the panel opening. Door leaf hung, aligned, and adjusted. Perimeter seals verified for consistent contact. Drop seal adjusted to floor surface.
Commissioning & Air Leakage Test
Closer speed and force adjusted. Interlock system commissioned and tested. Air leakage measured and documented. IQ record issued confirming Class 4 performance at site.
Hermetic Swing Doors Required by Every Major Cleanroom Standard
WHO & EU GMP
WHO GMP and EU Annex 1 (2022 revision) require all cleanroom boundaries to be designed for controlled air leakage and differential pressure maintenance. Hermetic swing doors are the primary engineering solution for personnel access points in GMP-regulated facilities.
WHO GMP · EU Annex 1ISO 14644 Cleanroom
ISO 14644-4 requires that cleanroom access systems maintain the design air cleanliness class — specifying that doors must not allow uncontrolled air movement between zones. Hermetic swing doors with certified Class 4 air leakage satisfy this requirement at all access points.
ISO 14644-421 CFR Part 11 (US-FDA)
Interlock controller data logs meet US-FDA 21 CFR Part 11 requirements for electronic records — providing timestamped, audit-trail evidence that the one-door-open protocol was adhered to during critical pharmaceutical operations.
21 CFR Part 11NABL & FSSAI / HACCP
NABL accreditation and FSSAI certification assessors inspect controlled environment access systems. Hermetic swing doors with documented air leakage performance and installation records demonstrate the systematic contamination control that both standards require.
NABL · FSSAI · HACCPReady to Seal Every Access Point in Your Cleanroom?
Contact Metrolabs for a free consultation. Our cleanroom door specialists will prepare a complete door schedule for your facility — specifying the correct size, material, seal system, hardware, and interlock configuration for each opening, with air leakage test certification at handover.
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