Detailed Product Description
We supply kinds of vertical hinged heat prevention doors.

Features:
1) Easily opened, tightly closed, easy operation, spacious feeling, good lighting
Effect
2) Low air and water infiltration, soundproof, heat insulation, fireproof, damp-proof
And corrosion-proof
3) Available in any sizes

Performance parameters:
1) Sound insulation: RW≥ 28dB
2) Wind pressure resistance: Third class (GB/T7106)
3) Air permeation resistance: Third class (GB/T7108)
4) Water resistance: Third class (GB/T7108)