The 93 Thermal Break Series folding door handles large openings in balconies, villas, and courtyards. Its top-hung, bottom-sliding structure carries panel weight through upper tracks, keeping movement steady. Panels fold and stack to one side to open up full passage width.
- Concealed hinge system with balance bearings for clean sightlines and smooth folding
- 14.8mm thermal break strip paired with 5+27A+5 insulating glass
- Even-number panel layout with a reinforced center mullion to limit sagging
- High track and water-blocking low track options for different site conditions
Product Details
Weight in this system is carried by the upper track and pulley components, so the bottom rail guides rather than bears load. When closed, the hinges tuck out of sight; when open, they connect and carry. Each hinge includes an adjustment function and balance bearings, allowing installers to correct panel sag on site without replacing parts.
Between panels, a reinforced center mullion spreads operational force across a wider area instead of concentrating it at edge points. This structural choice directly improves wind pressure resistance and sets the system apart from standard folding doors that lack centralized stress engineering. All stress points converge at the door's center, making the overall structure less prone to drooping over time.
Product Features
Concealed Adjustable Hinges: Hidden when closed for uninterrupted sightlines; built-in balance bearings and on-site adjustment correct sagging without part replacement.
Reinforced Center Mullion: Spreads force evenly across panels, improving wind resistance and cutting the long-term sag risk that standard folding doors face.
Top-Hung Bottom-Sliding Structure: Upper tracks carry the load while multi-wheel pulleys keep push-pull movement smooth, even for large, heavy panels.
Thermal Break Engineering: A 14.8mm strip combined with 5+27A+5 insulating glass regulates temperature and dampens sound for more comfortable interiors.
Dual Track Options: The high track (48mm threshold) blocks water effectively in exposed locations; the low track (18mm threshold) allows barrier-free passage where accessibility matters.
Anti-Sag Panel Layout: Even-number configurations focus stress at the center point, minimizing long-term door sag and reducing after-sales maintenance calls for project buyers.
Customizable Styles
Glass Configuration: Standard 5+27A+5 insulating glass; optional 27A electric blinds upgrade for integrated privacy and light control.
Track Type Selection: High track for exposed areas needing stronger waterproofing, or low track for accessible, low-threshold passage—matched to site conditions.
Panel Dimensions: Single panels from 500–850mm wide and 1000–3800mm high, configured to specific project opening requirements.
Glass Grid Bars: Optional 25x25 grid bar design available for decorative preferences and specific architectural styling.
Protective Panel Addition: An optional protective panel can be added below the door panel for durability in high-traffic or demanding environments.
Hardware Accessories
Concealed Adjustable Hinges: Balance bearings keep folding smooth; the adjustment function lets installers correct panel sag on-site during setup.
Multi-Wheel Pulley Components: Three-wheel and two-wheel structures share the load across multiple points, keeping large panels stable in motion.
Handle Lock Set: Grey long panel handle with integrated lock points and lock tongues for secure closing.
Lock Core with Key: Reliable locking for residential and commercial folding door applications.
Adjustment Rods and Connectors: Allow precise panel alignment during installation and support ongoing maintenance adjustments.
Basic Parameters
Performance Item | Available Information | Buyer Notes |
|---|---|---|
Thermal Insulation | 14.8mm thermal break strip + 5+27A+5 insulating glass | Confirm specific U-value requirements with local building codes for compliance. |
Wind Pressure Resistance | Reinforced center mullion with centralized stress distribution | Request specific wind load rating in Pa or kN/m² for project structural approval. |
Water Tightness | Multi-cavity profile with sealing strips; high track 48mm or low track 18mm | Low track projects require detailed site drainage and waterproofing node design verification. |
Air Tightness | Multi-cavity thermal break profile with sealing rubber strips | Request specific air permeability test data for project energy compliance documentation. |
Sound Insulation | 5+27A+5 insulating glass with black fluorocarbon aluminum spacer | Confirm specific Rw dB rating for projects with acoustic performance requirements. |
Product Specifications
Parameter | Detail |
|---|---|
Series | 93 Thermal Break |
Thermal Break Strip Width | 14.8mm |
Standard Glass | 5+27A+5 insulating glass |
Single Panel Width Range | 500mm - 850mm |
Single Panel Height Range | 1000mm - 3800mm |
Main Profile Wall Thickness | 2.0mm (ranges 1.5-2.5mm by component) |
High Track (W x H x Threshold) | 93mm x 63mm x 48mm |
Low Track (W x H x Threshold) | 93mm x 33mm x 18mm |
Recommended Panel Count | Even number design |
Upper Fixed Glass | Not available |
Optional Upgrades | 27A electric blinds, 25x25 grid bars, bottom protective panel |
Notes | Actual opening dimensions and panel combinations require project detail drawing confirmation. |
Advantages
Clean Sightlines: Hinges tuck out of sight when closed, keeping visual lines uninterrupted while retaining full folding function when opened.
Lower Installation Labor: On-site hinge adjustment with balance bearings simplifies sag correction, cutting installation time and labor costs.
Flexible Track System: High and low track options let a single product line serve different project waterproofing and accessibility needs.
Fewer Maintenance Calls: Even-number panel layout with central stress concentration limits long-term door sag, reducing after-sales service volume.
Accurate Procurement Planning: A complete profile system with exact model numbers and theoretical weights enables precise project cost calculation.
Application Scenarios
Apartment: Connects living rooms to balconies with a wide folding opening, drawing in natural light and ventilation while the thermal break maintains energy efficiency.
Home Office: Works as an indoor partition or terrace access point, dividing space flexibly with smooth folding operation for adaptable work environments.
Hotel: Serves as a courtyard or terrace entrance in hospitality settings, giving guests easy indoor-outdoor transitions with a clean, concealed-hinge look.
Office Building: Fits shop storefronts or interior partitions with professional styling, thermal break performance, and integrated lock security.
Outdoor: Functions as a courtyard or terrace door with the high track option for stronger waterproofing; confirm weather resistance and site drainage before installation.
Residential Building: Links indoor living spaces to balconies or gardens, offering wide unobstructed openings when folded and thermal plus acoustic insulation when closed.
Exterior: Acts as a villa courtyard or sunroom entrance with a wind-resistant center mullion structure; verify water tightness and surface finish for prolonged exposure.
Villa: Creates a grand opening for courtyards and terraces by stacking panels to one side, combining atmospheric scale with structural stability.
FAQ
What is the 93 Thermal Break Series Folding Door?
A top-hung bottom-sliding thermal break aluminum bifold door with concealed hinges, built for large openings in balconies, villas, courtyards, and commercial spaces.
Where can this bifold door be used?
Balconies, living rooms, courtyards, terraces, sunrooms, shops, villas, and indoor-outdoor partitions that need wide, unobstructed openings.
Can the door be customized to my project size?
Yes. Single panels range 500–850mm wide and 1000–3800mm high, with high or low track options. Actual configurations need project detail drawings for confirmation.
What information is needed for a quote?
Opening dimensions, preferred track type, panel count, glass configuration, color preference, and project location—these allow accurate pricing and lead time estimates.
Does DEJIYOUPIN support B2B commercial projects?
Yes. The complete profile system with exact specifications supports cost calculation, custom panel configurations, and detailed technical drawings for commercial procurement.
Are technical documents and installation drawings available?
Project-specific node drawings, profile specifications, and assembly references including 4+0 folding schemes are available on request for installation planning.
What should I confirm before placing an order?
Opening dimensions, track type based on waterproofing needs, panel count following the even-number recommendation, glass configuration, and site drainage conditions.
What about certifications, packaging, and shipping?
Certification and compliance details vary by market; packaging and shipping specifications are confirmed per order. Contact DEJIYOUPIN for project-specific documentation and logistics arrangements.
