Rongdu 90 Series High-Performance Thermal Break Casement Window (Curtain Wall Matching Engineering Grade)

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  • Estimated Delivery:Jun 28 - Jul 02

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Product description
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I. Core Structure and Profiles

The outer frame width of this product is 90 mm. The wall thickness of main profiles ranges from 1.8 mm to 2.2 mm, while key stress-bearing sections are thickened to 3.0 mm. It adopts high-precision 6063-T5 virgin aluminum alloy, featuring high material hardness and strong deformation resistance, so it resists distortion after long-term service.
This product applies a multi-cavity thermal break structure fitted with 25 mm-wide PA66 nylon thermal strips with an isotherm leveling layout, which effectively blocks heat and cold transfer, delivering superior thermal insulation and energy efficiency compared to conventional thermal break doors and windows.
In terms of processing, precise 45° miter cutting is adopted, reinforced by integrated aluminum injection corner brackets and pins. Corner structural strength is boosted by 50%, fundamentally eliminating common construction defects such as water seepage, air leakage and frame cracking.
For appearance, it features a minimalist flush frame-sash structure together with concealed drainage. No protrusions or exposed drainage holes exist on t

I. Core Structure and Profiles

The outer frame width of this system is 90 mm. Main profile wall thickness ranges from 1.8–2.2 mm, with key load-bearing sections reinforced up to 3.0 mm.

Material: high-precision 6063-T5 virgin aluminum alloy, offering excellent rigidity, high hardness, and strong anti-deformation performance for long-term stability.

The system adopts a multi-cavity thermal break structure combined with 25 mm PA66 nylon thermal strips. The isotherm-aligned design effectively blocks heat transfer and significantly improves energy efficiency.

Precision 45° miter cutting + integrated aluminum injection corner brackets + pin reinforcement. Corner strength increased by 50%, eliminating leakage, air infiltration, and frame cracking issues.

Flush frame-sash design with concealed drainage system ensures a clean exterior facade without exposed holes, enabling seamless integration with curtain wall systems.

II. Sealing and Performance (Curtain Wall Grade Standard)

Triple EPDM automotive-grade sealing strips + equal-pressure drainage structure ensure extreme weather resistance.

Performance ratings:
Air Tightness: Class 8
Water Tightness: Class 6
Wind Resistance: ≥ Class 9 (5.0 kPa+)

Glass system supports 5+20A+5 insulated tempered glass, with optional Low-E coating, laminated safety glass, and argon gas filling.

Sound insulation: 35–42 dB
Thermal insulation: U ≤ 1.8 W/(㎡·K)

Opening types include outward casement, inward casement, tilt-turn, and window-screen integrated systems. Tilt-turn mode supports ventilation + safety + anti-theft functions.

III. Hardware and Durability

European standard groove system with high-precision hardware compatibility. Optional imported hardware brands available.

Multi-point locking system (≥6 locking points) ensures anti-pry safety and smooth operation.

Hinges are made of 304 stainless steel, offering excellent corrosion resistance and durability. Sealing strips are designed for 20+ years service life.

Surface treatment: fluorocarbon coating or powder coating
Salt spray resistance: 1000+ hours
Suitable for coastal and high-humidity environments

Standard safety accessories include anti-fall ropes and limit stays. Tilt-turn models include child safety locks for high-rise protection.

IV. Application Scenarios

Widely used in high-end residential buildings, waterfront apartments, hotels, office towers, curtain wall supporting systems, and coastal typhoon-prone regions.

Ideal for projects requiring high sealing performance, energy efficiency, structural safety, and modern architectural facade aesthetics.
e exterior, enabling seamless integration with glass curtain walls to maintain a neat and unified building facade and meet modern public architectural facade design standards.

II. Sealing and Performance (Curtain Wall Grade Standard)

The window frame is equipped with three layers of automotive-grade EPDM composite sealing strips combined with equal-pressure cavity waterproof construction. It achieves Air Tightness Class 8 (highest national standard rating), Water Tightness Class 6, and Wind Resistance Grade ≥9, capable of withstanding wind pressure above 5.0 kPa, suitable for harsh weather such as typhoons and heavy rains.
Standard glazing is 5+20A+5 insulated tempered glass. Optional upgrades include Low-E coating, laminated safety glass and argon gas filling. Sound insulation performance reaches 35–42 dB with a heat transfer coefficient ≤1.8 W/(㎡·K), balancing outstanding noise reduction and energy conservation.
Diverse opening configurations are available: outward casement, inward casement, inward tilt-turn, and integrated window-screen combinations. The inward tilt-turn mode enables micro ventilation, rainy-day ventilation and anti-theft protection, balancing comfort and practicality.

III. Hardware and Durability

The frame follows European standard groove dimensions, fitted with premium custom precision hardware as standard; imported brand hardware accessories are optional. The multi-point locking system contains no fewer than 6 locking points for anti-prying security and smooth, stable operation.
Hinges are made of 304 stainless steel with strong corrosion and rust resistance. Sealing strips offer a weather-resistant service life of no less than 20 years.
Profile surfaces are finished with fluorocarbon spraying or powder coating, passing salt spray testing exceeding 1000 hours, making them ideal for coastal areas with high humidity and salt corrosion.
Comprehensive safety fittings come standard: anti-fall ropes and limit stays. Inward tilt-turn models add child safety locks, structurally eliminating high-rise window hazards and safeguarding residential safety.

IV. Application Scenarios

Widely deployed in high-end residences, riverfront and sea-view apartments, office building curtain wall supporting projects, hotels, apartments, high-rise buildings and typhoon-prone coastal zones. It suits construction projects with stringent requirements for sealing performance, energy efficiency, safety and facade aesthetics.
Shipping cost is based on weight. Just add products to your cart and use the Shipping Calculator to see the shipping price.We want you to be 100% satisfied with your purchase. Items can be returned or exchanged within 30 days of delivery.

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