Ventilation grilles, heavy-duty version, with movable and closable blades, optically free cross-section 88%, physically free cross-section 53%.
Ventilation grille W427 in closed state
Ventilation grille W427 with fly gauze
Versions W427
The operating elements for the W427 lockable ventilation grille can be optimally adapted to the structural conditions. The following drive options are available:
Type W427/2 Wire rope Max. 5000 mm, minimum height 390 mm
Type W427/3Crank drive Max. 7000 mm, minimum height 690 mm
Type W427/4With motor 220 V - 24 V, minimum height 690 mm
Type W427/5 Compressed air, minimum height 390 mm
Material
The ventilation grilles are made of aluminum profiles: AlMgSi 0.5 (according to EN 12020-2)
304 stainless steel insect screen - 6 x 6 mm (2.3 x 2.3 mm mesh size on request)
Silver color (E6/EV1) - bronze color (E6/C34) (20 micron) anodized or powder coated according to RAL colors (60-80 micron)
Ventilation grille dimensions
Installation depth: 82 mm
Overlap dimension: 50 mm
Minimum dimensions: 300 x 290 mm
Maximum width in one piece: 1300 mm
Preferred height = (a multiple of 100) + 290 mm
Please specify when ordering: Installation dimension (width x height)
Note: The minimum height depends on operating options (see description).
Mounting
Wall anchor no. W429
Ventilation grille operation options
W427/1 Manual override
W427/2 Wire rope
W427/3 Crank drive
W427/4 Motor 230V-24V / Spring return actuator 24V
W427/5 Compressed air
Options
Without stop frame
Ventilation grille for frame installation see W427GL
Typical application areas
Power plants
Airport
Skyscrapers
Controlled ventilation
Production halls
Assembly of the ventilation grille Frankfurt Airport
rotec moteurs installing the ventilation grilles
BV. Flughafen Frankfurt/Main
Drawings ventilation grille W 427



Technical data ventilation grille W427
| Air diffuser | EN 13030 |
| K-factor (supply) | 11,41 |
| K-factor (discharge | 11,65 |
| Ce coefficient | 0,296 |
| Cd coefficient | 0,293 |
| Optical free cross section | 88% |
| Physical free cross section | 53% |