LD 80 SERIES

Thermally Broken Aluminum Alloy Casement Door/Window

LD 80 SERIES Features

Aluminum:

YKK-AP original aluminum profile, wall thickness 2.0 mm.

Nylon strip:

YKK‑AP original, PA66GF25 (nylon 66 with 25% glass fiber).

Glass:

Xinyi original glass sheet – processed by Dalian Huaying.

Rubber seals:

YKK‑AP original, EPDM and sponge foam strips – suitable for inward tilt‑turn applications.

Hardware fittings:

YKK‑AP original hardware;

Performance parameters:

Thermal insulation K‑value: 1.1 W/(m²·K)

Air permeability class: 8

Watertightness: 700 Pa

Wind load resistance: 3000–3500 Pa

Sound insulation: 30–35 dB

Thermal insulation – 44 mm thermal break + high‑insulation materials around glass.
Air/water tightness – Three‑seal construction, equal‑pressure drainage, horizontal weep holes (no backflow).
Wind resistance – Multi‑point locks + locking blocks (＞3000 Pa).
Acoustics – Optimised sections for good sound insulation.
Slim profile – 90° corner joints for narrower visible frame, better views.
Compliant wall thickness – Meets GB/T 8478‑2020 (ext. window ≥1.8 mm).
Self‑supporting glazing bead – Cavity design improves stability and installation.
Hardware – Concealed tilt‑turn options, ergonomic handle (≥80 mm), restricted stay.
Quality – JIS certified.

K‑value – 0.7～2.0 W/(m²·K) depending on climate zone (per GBT 51350‑2019).
Wind load – ＞3000 Pa (multi‑point locking).
Air/water tightness – Excellent (specific grades not stated, but three‑seal design).
Sound insulation – Good (no exact dB given).
Weather resistance – SG coating retains 100% gloss after 750h UV aging (≈5 years).

Climate – Especially suitable for Southeast China’s hot, rainy coastal areas.
Building types – Residential buildings, from 30% to 95% (zero‑energy) efficiency levels.
Regional codes – Complies with standards in Beijing, Tianjin, Hebei, Shandong, Jiangsu, Shanghai, Zhejiang, Anhui, Hubei, Chongqing, Shenzhen (K‑requirements 1.1～2.0).
Window types – Outward/inward casement, tilt‑turn, top‑hung, fixed, and outward doors.

Aesthetics – Slimmer profile, wider indoor/outdoor views, modern appearance.
Safety & durability – Child‑fall prevention (concealed hardware), robust wind resistance, long lifespan.
Easy installation – Self‑supporting glazing bead snaps in quickly.
High performance – Superior water, air, thermal, and acoustic protection.
Quality assurance – All YKK‑AP original materials (aluminum, nylon PA66GF25, EPDM seals, hardware) with JIS certification.