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Electric Sliding Cold Room Door — Insulated Automatic Sliding Door for Cold Storage Facilities
A heavy-duty, motor-driven sliding door engineered for temperature-controlled environments. Designed for high-frequency opening cycles in cold chain logistics, food processing plants, pharmaceutical cold rooms, and agricultural produce storage.
Product Summary
The XNAIR electric sliding cold room door is a fully insulated, motor-driven access solution built for industrial cold storage. It combines a rigid PU foam-core panel (75–150mm thickness options) with a servo-controlled sliding mechanism that delivers smooth, rapid opening and closing — typically 0.2 to 0.8 meters per second, adjustable via the control panel. Designed for continuous duty in environments ranging from −40°C freezer rooms to +40°C ambient loading docks, this door meets CE safety directives and is manufactured under ISO 9001 quality management. Every unit undergoes a full-load factory acceptance test before dispatch.
Technical Specifications
| Parameter | Specification / Options |
|---|---|
| Door Panel Thickness | 75mm / 100mm / 150mm — rigid polyurethane (PU) foam injection, density 40±2 kg/m³ |
| Usable Temperature Range | −40°C to +40°C (ambient side); panel U-value ≤ 0.22 W/m²·K (100mm panel) |
| Door Leaf Dimensions | Width: 900mm – 4000mm; Height: 2000mm – 5000mm (fully customizable) |
| Opening / Closing Speed | 0.2 – 0.8 m/s (variable frequency drive, soft-start & soft-stop) |
| Motor Power Rating | 0.75kW / 1.5kW / 2.2kW — IP54 sealed, Class F insulation |
| Voltage & Frequency | 220V / 380V / 440V — 50Hz / 60Hz (specify at order) |
| Frame Material | Galvanized steel (standard) or SUS304 stainless steel (optional for high-humidity / washdown areas) |
| Gasket / Seal Type | EPDM rubber, dual-fin profile, elastic from −50°C to +120°C; compression set ≤ 25% |
| Track System | Overhead sliding track, galvanized steel with sealed ball-bearing rollers; optional stainless track |
| Safety Features | Infrared obstruction sensor, emergency stop button, manual release handle (standard); safety airbag strip (optional) |
| Control Interface | Push-button wall panel + wireless remote; optional integration with facility BMS via dry contact |
| Certification | CE (Machinery Directive 2006/42/EC), ISO 9001:2015 |
Application Scenario — Cold Chain Logistics & Food Processing
Built for High-Cycle Cold Chain Environments
In large-scale food cold chain logistics hubs, doors must withstand hundreds of open/close cycles per day while maintaining strict temperature separation. The XNAIR electric sliding door is engineered with a reinforced overhead track and high-durability roller assembly rated for over 500,000 cycles. The rapid 0.6–0.8 m/s opening speed minimizes thermal exchange between cold rooms and ambient loading docks, directly reducing refrigeration energy costs. The EPDM gasket system maintains an airtight seal even after prolonged exposure to −25°C freezer conditions, preventing frost buildup around the door perimeter.
Engineering & Construction Details
Panel Construction & Thermal Integrity
The door leaf is manufactured using a continuous high-pressure PU foam injection process, bonding the internal insulation directly to the outer galvanized steel skin without air gaps. At 100mm panel thickness, the thermal transmittance (U-value) is tested at ≤ 0.22 W/m²·K per EN 12412. The perimeter frame uses a thermal break design — a polyamide strip separates the inner and outer metal profiles — preventing condensation on the warm side of the door in high-humidity environments. All fasteners within the cold-side assembly are A2-70 stainless steel to resist corrosion from condensation and cleaning chemicals.
- PU Foam Core: 40±2 kg/m³ density, CFC-free blowing agent, zero ODP, low GWP.
- Thermal Break Frame: 20mm polyamide isolation strip between inner and outer profiles.
- Roller Assembly: Sealed deep-groove ball bearings, Ø68mm nylon-encapsulated wheels, rated 500k+ cycles.
- Bottom Seal: Adjustable-height EPDM blade seal with aluminum retainer bar; compensates for minor floor unevenness.
- Emergency Release: Internal mechanical push-bar allows manual door operation during power failure.
- Heated Gasket Option: Self-regulating trace heating embedded in the gasket channel prevents ice-lock in freezer applications below −18°C.
Global Adaptability — Engineered for Regional Conditions
Africa & Middle East — High Ambient Heat
In regions where ambient temperatures regularly exceed 45°C, standard door motors risk thermal overload. XNAIR configures motors with Class F insulation (155°C rated) and oversized cooling fins on the gearbox housing. The control panel enclosure is ventilated with a dust-filtered intake, and all wiring uses XLPE insulation rated for continuous operation at 90°C ambient. The external door skin can be specified with a reflective white polyester coating to reduce solar heat absorption.
Europe & North America — CE Compliance & Low-GWP Refrigerant Compatibility
For EU and North American markets, the door is fully CE-marked under the Machinery Directive 2006/42/EC and comes with a Declaration of Conformity. The PU foam uses a cyclopentane blowing agent (GWP < 5), aligning with EU F-Gas Regulation targets. Electrical components are sourced from Siemens and Schneider to meet UL / IEC standards. Voltage configurations for 208V/60Hz (US) and 400V/50Hz (EU) are standard catalog options.
Southeast Asia & South America — High Humidity & Corrosion Resistance
In tropical climates with 80–95% relative humidity, condensation and mold growth on door surfaces can become a persistent problem. XNAIR offers a full SUS304 stainless steel frame and track option with electropolished surface finish. The motor housing is upgraded to IP65 sealing, and all exposed fasteners are A4-80 marine-grade stainless. An optional anti-sweat heater wire embedded in the door frame perimeter prevents surface condensation without affecting the cold room's internal temperature stability.
Pharmaceutical & GMP Environments
For pharmaceutical cold storage under GMP (Good Manufacturing Practice) guidelines, the door can be supplied with a flush-mount track system that eliminates overhead ledges where dust might accumulate. The door skin uses a food-grade PVC laminate over galvanized steel for easy wipe-down cleaning. Full IQ/OQ documentation packages are available to support regulatory audits and facility qualification protocols.
Shipping & Logistics — Sea freight-Ready Packaging
Heavy-Duty Crating for International Ocean Freight
Every XNAIR electric sliding cold room door is packed in a fumigated, ISPM-15 compliant plywood crate with internal high-density foam cushioning. The door leaf is vertically strapped to prevent warping during transit, and the track assembly is secured in a separate compartment to avoid abrasion. Each crate is reinforced with steel edge protectors and rated for stacking up to three units high in a standard 40ft HC container. A vacuum-sealed desiccant pack is included to maintain internal humidity below 40% RH during extended sea freight journeys, protecting metal surfaces from salt-spray corrosion.
Factory Quality Control — 100% Pre-Shipment Testing
Every Door Tested Under Full Load Before Dispatch
No XNAIR cold room door leaves the factory without undergoing a complete functional acceptance test. Each unit is fully assembled on the test bench and subjected to 50 consecutive open/close cycles at the rated speed while the motor current draw, gasket compression, and control logic are monitored in real time. The test protocol includes: (1) electrical safety ground-bond and insulation resistance testing per IEC 60335, (2) mechanical alignment verification using laser measurement, and (3) thermal imaging of the panel surface to confirm insulation uniformity. A signed test report with serial number traceability is included in every shipment.
Frequently Asked Questions
What is the minimum and maximum door size you can manufacture?
We manufacture electric sliding cold room doors from 900mm × 2000mm (width × height) up to 4000mm × 5000mm. For oversized openings exceeding these dimensions, our engineering team can design a bi-parting (double-leaf) sliding configuration. Fully custom dimensions are available upon request — we provide detailed CAD drawings for client approval before production begins.
How do you ensure the door seal remains airtight after years of heavy use?
Our doors use EPDM rubber gaskets with a dual-fin profile that maintains elasticity from −50°C to +120°C. The gasket compression rate is factory-set at 25–30% of its uncompressed height, which is the optimal range for long-term sealing performance without permanent deformation. The gasket is mounted in a slotted aluminum retainer channel, allowing easy field replacement without disassembling the door leaf. Replacement gasket kits are stocked as standard spare parts and can ship within 5 working days.
What safety features does the electric sliding door include as standard?
Every XNAIR electric sliding cold room door includes: an infrared obstruction sensor across the door opening that reverses door movement if a person or object is detected; an emergency stop button on the control panel; and a mechanical manual release handle on the interior side that allows the door to be pushed open during a power failure. An optional safety airbag contact strip along the door's leading edge is available for high-traffic installations where forklifts and personnel share the same doorway.
Can the door operate reliably in high-humidity tropical environments without corrosion issues?
Yes. For tropical and high-humidity regions (Southeast Asia, coastal South America, etc.), we offer a full SUS304 stainless steel package covering the door frame, track assembly, fasteners, and motor housing (upgraded to IP65). The EPDM gasket is inherently mold-resistant. For freezer applications in humid climates, we also offer a heated gasket option — a self-regulating trace heating element embedded in the gasket channel prevents ice buildup that could compromise the seal. This option draws approximately 25W per linear meter and activates only when the surface temperature drops below 2°C.
Quality Assurance & Industry Certifications
XNAIR electric sliding cold room doors are manufactured by Shanghai XiangNing Electromechanical Equipment Co., LTD under an ISO 9001:2015 certified quality management system. Every door undergoes a rigorous multi-point factory acceptance test (FAT) prior to shipment, with results documented in a traceable inspection report bearing the unit's unique serial number.
Our standard factory test protocol includes:
- Electrical Safety Test: Ground-bond resistance ≤ 0.1Ω and insulation resistance ≥ 10MΩ at 500V DC, per IEC 60335-1.
- Mechanical Cycle Test: 50 consecutive open/close cycles at rated speed; motor current, track alignment, and gasket compression are monitored for deviation.
- Thermal Uniformity Scan: Infrared imaging of the entire door panel surface to verify consistent PU foam density and detect any internal voids.
- Control Logic Verification: Functional test of all safety sensors, emergency stop, manual release, and optional BMS dry-contact integration.
Applicable Certifications & Standards: CE Marking (Machinery Directive 2006/42/EC), ISO 9001:2015, EN 12412 (thermal transmittance testing), IEC 60335 (electrical safety). Additional regional certifications (e.g., UL, EAC) can be arranged for specific markets upon request.
