The 93 Series frosted glass internal bifold doors from DEJIYOUPIN use a top-hung bottom-slide folding mechanism built for wide openings. Concealed hinges and anti-sag construction make this insulated aluminum bifold door suitable for balconies, living rooms, courtyards, and commercial partitions.
- Top-hung bottom-slide structure for stable folding operation
- 14.8mm thermal barrier strip with 5+27A+5 insulated glass
- Hidden adjustable hinges with integrated balance bearings
- Two track options to match project waterproof and access needs
Product Details
Panels fold and stack to one side, clearing the full opening width. A reinforced center mullion concentrates force at the center point, which lowers panel sag risk over time. When closed, the hinge system disappears entirely, leaving a clean surface for transparent, wide-span designs.
Unlike standard bifold doors, this system builds adjustment capability directly into the hinges. Integrated balance bearings allow on-site correction of common sag issues after installation, without replacing hardware. The 14.8mm barrier strip combined with 5+27A+5 double glazing contributes to thermal and acoustic performance at indoor-outdoor boundaries. Two track configurations serve different priorities: the 48mm raised threshold for water blocking, and the 18mm flush threshold for barrier-free passage where accessibility matters.
Product Features
Clean Visual Finish: Hinges disappear when closed, leaving a minimalist surface that works well in high-end interiors and commercial architecture.
Sag Resistance: Reinforced center mullion with center-point force concentration, plus an even-panel recommendation, cuts long-term door panel sagging risk.
On-Site Adjustability: Balance bearings built into the hinges allow smoother push-pull operation and let installers correct sag without replacing components.
Insulated Performance: The 14.8mm barrier strip paired with 5+27A+5 double glazing supports heat and sound insulation at transition openings.
Track Flexibility: Pick the 48mm raised threshold for water blocking or the 18mm flush threshold for easy passage — match the choice to your project's drainage and accessibility conditions.
Full-Width Opening: Bifold panels fold and stack to one side, maximizing passage width for balconies, terraces, and commercial partitions.
Customizable Styles
Glass Configuration: Standard 5+27A+5 insulated glass; optional 27A electric blinds and 25×25 grid bars. Frosted glass availability should be confirmed with supplier.
Track System Selection: 48mm raised threshold for stronger water blocking, or 18mm flush threshold for convenient passage — choose based on project drainage conditions.
Panel Size Customization: Single panel width 500–850mm, height 1000–3800mm; actual opening dimensions confirmed via project detail drawings.
Panel Count Configuration: Even number of panels recommended to reduce sag risk; 4+0 bifold scheme commonly used with flexible panel arrangements.
Bottom Guard Plate Option: Optional guard plate at door panel base for additional protection and finishing detail.
Hardware Accessories
Concealed Adjustable Hinges: Silver finish with integrated balance bearings and adjustment function; hidden when door is closed for clean aesthetics.
Multi-Wheel Pulley Components: 3-wheel and 2-wheel pulley structures for top-hung bottom-slide operation, keeping folding movement stable and smooth.
Lock Cylinder with Key: Standard keyed lock cylinder for secure locking in residential and commercial settings.
Long Panel Handle: Gray long handle with lock points and lock tongue structure — comfortable grip, reliable latching.
Folding Hinges and Adjustment Rods: Folding hinges and connector rods link panels and allow fine-tuning during installation for precise alignment.
Basic Parameters
Performance Item | Available Information | Buyer Notes |
|---|---|---|
Thermal Insulation | 14.8mm thermal break strip + 5+27A+5 insulated glass | Buyers should request thermal test certificates for project compliance verification |
Wind Pressure Resistance | Reinforced center mullion with center-point force concentration | Buyers must verify wind load rating for high-rise or high-wind-area installations |
Water Tightness | High track 48mm threshold or low track 18mm threshold with multi-seal | Confirm water penetration rating; low track requires on-site drainage design |
Air Tightness | Multi-cavity thermal break profile with sealing rubber strips | Buyers should request air permeability test data for energy compliance requirements |
Sound Insulation | 5+27A+5 insulated glass configuration with sealing system | Buyers must confirm acoustic performance rating for project-specific sound insulation needs |
Product Specifications
Parameter | Specification |
|---|---|
Product Name | 93 Thermal Break Series Bifold Door |
Product Type | Thermal break aluminum bifold door |
Thermal Break Strip Width | 14.8mm |
Standard Glass | 5+27A+5 insulated glass |
Profile Wall Thickness | 2.0mm standard (parts range 1.5–2.5mm) |
Single Panel Width | 500–850mm |
Single Panel Height | 1000–3800mm |
High Track Dimensions | W93mm × H63mm, threshold 48mm |
Low Track Dimensions | W93mm × H33mm, threshold 18mm |
Glass Grid Bar | 25×25 (optional) |
Top Track Profile Thickness | 2.5mm |
Recommended Panel Count | Even number preferred |
Fixed Glass on Top | Not configurable |
Notes | Specifications subject to project detail drawing confirmation; contact supplier for complete profile system data |
Advantages
Clean Visual Design: Hidden hinges and narrow frame profile create a minimalist look for modern interiors and large openings.
Lower Sag Risk: Even panel recommendation, adjustable hinges, and reinforced mullion reduce long-term maintenance and warranty concerns for B2B buyers.
Installation Efficiency: Hinges with balance bearings simplify on-site fitting, cutting labor time and installation costs for contractors.
Flexible Project Configuration: Two track options and wide panel size range accommodate diverse project waterproof, accessibility, and spatial requirements.
Insulated Performance: Thermal barrier structure with insulated glass supports indoor comfort for spaces connecting interior and exterior environments.
Application Scenarios
Apartment: The 18mm flush threshold lets residents move between living areas and balconies without stepping over a high barrier — useful in compact layouts where floor space matters.
Home Office: Folding panels separate workspace from living areas on demand; frosted glass may be available as a privacy option (confirm with supplier).
Hotel: Grand bifold openings connect lobby or suite interiors to outdoor terraces; the concealed hinge design maintains the clean aesthetic standard expected in hospitality settings.
Office Building: Internal bifold partitions divide or open meeting and collaboration spaces; the insulated profile supports energy-efficient operation in commercial buildings.
Outdoor: Bifold doors open courtyards and terraces to exterior areas; confirm weather resistance, water tightness, and surface finish for exposed transitional spaces before specifying.
Residential Building: Living room-to-balcony connections combine insulation with wide passage access for family homes and multi-unit complexes.
Exterior: Insulated aluminum construction with double glazing handles exterior exposure; verify wind pressure rating and surface finish suitability for your outdoor installation conditions.
Villa: Expansive bifold openings suit courtyard and sunroom applications; the hidden hinge aesthetic aligns with high-end residential design expectations.
FAQ
What is this product?
The 93 Thermal Break Series is a top-hung bottom-slide insulated aluminum bifold door by DEJIYOUPIN, built for large internal openings with hidden hinge aesthetics and anti-sag engineering.
Where can it be used?
Balconies, living rooms, courtyards, terraces, sunrooms, shops, villas, and indoor-outdoor partitions — anywhere requiring wide opening access and reliable insulation.
Can it be customized?
Yes — panel sizes from 500–850mm wide and 1000–3800mm high, raised or flush track options, optional electric blinds and grid bars. Confirm frosted glass and color availability with supplier.
What information is needed for a quote?
Opening dimensions, preferred track type, panel count, glass configuration, project location, and quantity. Detailed project drawings help us provide accurate pricing and specification.
Can it be used for B2B projects?
Yes — the anti-sag engineering, adjustable installation hardware, and dual track options support commercial project requirements. Request project-specific test certificates for compliance verification.
Are technical documents available?
Product demonstration videos and profile system data are available. Note: the existing installation video covers the N93X inward-opening window, not the 93 bifold — request bifold-specific installation documentation from supplier.
What should buyers confirm before ordering?
Actual opening dimensions via project drawings, track type for site drainage, panel count, glass options, and that fixed glass on top is not configurable on this model.
How should buyers confirm certification, packaging, and shipping?
Certification and compliance details should be confirmed with supplier for your target market. Packaging and shipping methods are arranged per project; contact supplier for specific documentation and logistics.
