LD 135 SERIES
Thermally Broken Aluminum Alloy
Sliding Door/Window
LD 135 SERIES Features
Aluminum:
YKK-AP original aluminum profile, wall thickness 2.2 mm.
Application:
YKK-AP silent and wind‑resistant series sliding window.
Nylon strip:
YKK-AP original, PA66GF25 (nylon 66 with 25% glass fiber).
Glass:
Xinyi original glass sheets – processed by Dalian Huaying.
Rubber seals:
YKK-AP original, EPDM and sponge foam strips.
Hardware fittings:
YKK-AP original.
Performance:
Thermal insulation K‑value: 2.2 W/(m²·K)
Air permeability: Class 8
Watertightness: 700 Pa
Wind load resistance: 2500–3000 Pa
Sound Proof: 32 dB
Main Features
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Sliding design saves interior space; ventilation volume is freely adjustable.
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24 mm thermal break with 90° roll‑formed structure improves insulation; dual AT materials ensure excellent isotherm performance.
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Anti‑thermal‑bow strips reduce frame deformation by 30 % under temperature differences.
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Two‑layer sealing with soft‑hard composite gaskets (fish‑fin design) for high air tightness.
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Pressure‑equalising drainage (patent pending) for superior water tightness.
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Roll‑formed profiles, T‑stiffening ribs on sash, 2 mm wall thickness, and locking blocks for strong wind resistance.
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Double‑glazing offers good sound insulation.
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Ergonomic handles, assist levers, anti‑detachment fittings, and child‑safety limiters (7 cm / 10 cm openings) for safety and ease of use.
Thermal Insulation
The LD135 features 24 mm PA66 thermal break strips, reinforced anti-deformation profiles, and supports triple-glazed insulated glass to minimize heat transfer and deliver outstanding energy efficiency.
Condensation Resistance
An advanced thermal break structure combined with insulated glazing effectively reduces condensation, keeping interior surfaces dry and comfortable even in cold weather.
Acoustic Performance
A dual-sealing system and insulated glazing provide excellent sound insulation, creating a quieter and more comfortable indoor environment.
Wind Resistance
A reinforced sash design and mechanically crimped thermal break profiles ensure excellent structural strength and reliable wind resistance.
Water Tightness
The pressure-equalized drainage system and optimized water channels quickly remove rainwater, providing superior protection against water infiltration during heavy rainfall.
Air Tightness
Soft-and-hard composite seals and a dual weather-sealing design effectively block air leakage, dust, and drafts, improving indoor comfort and energy efficiency.
Ideal Applications
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Thermal insulation (K‑value): 2.2 W/(m²·K)
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Air tightness: Class 8
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Water tightness: Class 6 (≥700 Pa)
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Wind load resistance: Class 4 (≥2500 Pa)
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Sound insulation: Level 3 (up to 32 dB)
Advantages
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Free control of ventilation while saving space.
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Robust weather performance (water, air, wind, noise) with patented drainage and anti‑deformation designs.
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Child‑safe ventilation with fall‑prevention limiters.
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Easy operation for all ages via ergonomic hardware and assist mechanisms.
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Reliable YKK AP quality with proven durability in demanding climates.
