Vertical Lifting Doors – Insulated High-Speed Industrial Cold Storage Doors
Xnair vertical lifting doors are purpose-built for temperature-controlled logistics environments. With polyurethane insulation from 40mm to 150mm panel thickness, 0.3 m/s fast opening, and multi-voltage motor compatibility, each door is fabricated to order for cold storage warehouses, food processing plants, and pharmaceutical clean rooms worldwide.
Technical Specifications
| Parameter | Specification | Unit / Standard |
|---|---|---|
| Door Size Range (W × H) | 2000×2000 to 8000×10000 (larger upon engineering review) | mm |
| Panel Thickness Options | 40 / 60 / 80 / 100 / 120 / 150 | mm |
| Insulation Material | High-density polyurethane (PU), 40–45 kg/m³ core density | DIN EN 13165 |
| Thermal Transmittance (U-value) | 0.8 (40mm) down to 0.3 (150mm) | W/m²K |
| Opening Speed | 0.2–0.5 (factory preset 0.3) | m/s |
| Motor Power | 0.75 / 1.5 / 2.2 / 3.0 / 5.5 | kW |
| Power Supply | 220–240V/1Ph/50–60Hz or 380–415V/3Ph/50–60Hz | IEC 60038 |
| Motor Protection Grade | IP65 | IEC 60529 |
| Wind Load Resistance | Class 3–5 (up to 1200 Pa) | EN 12424 |
| Air Tightness | Class 3 (max 2.5 m³/m²·h at 50 Pa) | EN 12426 |
| Operating Temperature Range | -40°C to +50°C (cold side); external ambient to +55°C | °C |
| Door Leaf Material | 0.6mm galvanized / galvalume steel skins + PU core | DX51D+Z |
| Perimeter Seal | EPDM rubber, low-temperature grade (-40°C) | ASTM D2000 |
| Safety Devices | Photoelectric sensor + bottom safety edge + emergency manual release | EN 12453 |
| Design Cycle Life | 100,000+ cycles between major service intervals | Factory tested |
Engineered for Demanding Cold Chain Environments
In frozen food distribution centers operating at -25°C, every second of door-open time translates directly to energy loss and frost buildup. Xnair vertical lifting doors are deployed in high-traffic loading bays where 80–120 cycles per day are routine. The 0.3 m/s opening speed minimizes thermal exchange, while the full-perimeter EPDM seal compresses against the galvanized steel frame to lock in cold air. For food processing plants subject to HACCP audits, the smooth, crevice-free door face eliminates bacterial harborage points and withstands daily washdown protocols.
Structural Engineering & Material Integrity
Each door leaf is a bonded sandwich of 0.6mm galvanized steel skins encapsulating a high-density polyurethane core. The PU foam is injected under high pressure to achieve a uniform 40–45 kg/m³ density with zero voids, verified by thermal imaging spot checks. The counterweight system uses powder-coated steel guide rails with nylon roller bearings for low-friction vertical travel. For facilities requiring visual access, double-pane heated glass vision panels (24V anti-condensation) can be integrated into the door leaf without compromising the U-value beyond 5% of the base panel rating.
Global Adaptability – Engineered for Every Climate Zone
Africa & Middle East – High Ambient Heat
For Gulf region cold stores where external ambient temperatures exceed 50°C, Xnair specifies enhanced 80–150mm PU panels with a UV-stabilized exterior coating. The thermal gradient across the door is rigorously calculated to prevent external face sweating. Motor drives are fitted with extended-temperature capacitors rated for continuous operation at 55°C ambient.
Europe & North America – Regulatory Compliance
All Xnair vertical lifting doors shipped to EU and North American markets carry full CE marking (EU 305/2011) and are built to EN 13241-1 industrial door standards. Electrical components meet IEC/EN 60204-1, and control panels accept 208–240V/60Hz for the North American grid. Documentation packages include Declarations of Performance (DoP) for thermal transmittance.
Southeast Asia & South America – High Humidity & Corrosion
In tropical climates with 85–95% RH year-round, all exposed steel components are upgraded to grade 304 stainless steel (track brackets, hinge pins, fastener kits). The galvanized door skins receive an additional epoxy primer coat. EPDM seals are formulated with anti-fungal additives to resist mold growth in damp conditions. Sea-freight packaging includes vacuum-sealed VCI (vapor corrosion inhibitor) film for long-haul container transport.
Container-Ready Packaging for Damage-Free Global Shipping
Every vertical lifting door assembly is secured in a custom-built export-grade plywood crate with internal steel angle bracing. The door panel rests on high-density polyurethane cushion blocks that absorb container vibration during ocean transit. All steel surfaces are treated with VCI film to prevent salt-spray corrosion on 30–45 day sea routes. Each crate includes a QR-coded packing list, torque-checked bolt kit, and a printed installation manual in English (Spanish, French, and Arabic translations available on request).
100% Factory Testing Before Dispatch
Before crating, every single Xnair vertical lifting door undergoes a mandatory 50-cycle run-in test on our in-house test rig. Technicians record opening/closing speed, motor current draw, seal compression uniformity (measured with 0.1mm-resolution feeler gauges at 8 perimeter points), and emergency stop response time. These readings are compiled into a serial-numbered Factory Acceptance Test (FAT) report that ships with the door. Spot thermal imaging audits verify insulation integrity on 15% of production units.
Frequently Asked Questions
You need a level concrete floor with adequate header space above the opening – typically door height plus 400–600mm for the lifting drum and motor assembly. Three-phase power supply (380–415V) is standard; single-phase 220–240V is available for smaller models up to 3.0kW. We provide a detailed site preparation checklist with anchor bolt layout drawings after order confirmation.
Xnair maintains a dedicated spare parts inventory for all vertical lifting door models. Standard wear parts – EPDM seals, roller bearings, motor brushes, control board modules – can be dispatched within 48 hours via air freight. For urgent needs, DHL/FedEx express reaches most global destinations in 3–7 business days. Each door ships with a recommended spare parts list keyed to the serial number.
Yes, every Xnair vertical lifting door is built to order. We accommodate widths from 2,000mm to 8,000mm and heights from 2,000mm to 10,000mm as standard. Larger sizes are available upon engineering review. Custom panel thickness, RAL color matching, vision window placement, and control system integration (Modbus, dry-contact interlocks) are all supported. Lead time for custom-sized doors is typically 25–35 working days plus shipping.
Monthly visual inspection of EPDM seals for wear or ice buildup is recommended in sub-zero applications. Quarterly lubrication of roller tracks and counterweight guide rails with low-temperature grease, plus biannual motor drive system checks (torque verification, brake gap measurement). The control panel should be inspected annually by a qualified technician. Our doors are designed for 100,000+ cycles between major service intervals under normal cold storage conditions.
Quality Assurance & Industrial Certifications
Factory Acceptance Testing: Every Xnair vertical lifting door is subjected to a mandatory 50-cycle operational test on a dedicated rig before crating. We measure and record opening/closing speed, motor current profile, seal compression uniformity at 8 perimeter check points (using 0.1mm-resolution feeler gauges), and emergency stop response time. These results are compiled into a serial-numbered FAT report. Additionally, 15% of production units undergo thermal imaging audit to verify insulation integrity.
Applicable Standards & Certifications: Our vertical lifting doors conform to EN 13241-1 (industrial, commercial, and garage doors), with air permeability tested per EN 12426 Class 3 and wind load resistance per EN 12424. Electrical systems comply with IEC/EN 60204-1. All doors shipped to EU markets carry full CE marking under Regulation (EU) 305/2011. Our manufacturing facility operates under an ISO 9001:2015 certified quality management system.
