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MLL Ventilation grid type 622L

Ventilation grids

MLL Ventilation grid type 622L

Ventilation grids
  • 62% free ventilation cross-section
  • Z-slats
  • Insect or bird protection grids
  • Assembly enclosed in brickwork openings
  • High-quality aluminium
  • Proven clip system

Product Description

The weather protection grid, System 622L, from MLL Hamburg, is a ventilation grid made of aluminium with a free ventilation cross section of 62%. The system 622L is equipped with a Z-slat of the medium series of type 020L, which in turn is installed in enclosed Frame 602 by means of a proven clip technology. The slats fastened with the MLL clip system are also removable afterwards for repair work on on the facade or similar purposes.

MLL-Ventilation grid type 622L
MLL medium series, Z-slat
MLL-Slat 020L in Frame 602

Surface :
Anodised E6/EV1, C31-35
RAL according to choice / unfinished
Special colors on request

Scope :
Weather protection grid from MLL for enclosed
assembly, e.g.: Brickwork opening.

Area of Application :
For indoor and outdoor use.

Struture :
Pre-assembled for frame with bracket and slat

Required Accessory :
Fixture screws
Fastening bracket
Wall anchor

Optional Accessory :
Fly screen: Fibreglass mesh 1,4 mm / Stainless steel mesh 1,4 mm
Bird protection: Galvanized mesh 10 mm / Stainless steel mesh 8 mm

Technical Data

Assembly Enclosed
Grid dimension of the supporting pillar / max. span of the slat 1000 mm
Free ventilation cross-section 62%
Slat distance 50 mm
Loss coefficient exhaust air 5,9 Flow coefficent exhaust air 0,40
Loss coefficient supply air 6,7 Flow coefficent supply air 0,38
flow velocity in m/s dB (A) 1,0 m/sec dB(A) 31
1,5 m/sec dB(A) 32
2,0 m/sec dB(A) 35
2,5 m/sec dB(A) 36
3,0 m/sec dB(A) 37
3,5 m/sec dB(A) 38
4,0 m/sec dB(A) 39
4,5 m/sec dB(A) 41
5,0 m/sec dB(A) 45
6,0 m/sec dB(A) 50
7,0 m/sec dB(A) 57
Construction product Yes / certification acc. to DIN EN 10204

System Components

Lamella

Slat 020L

Variant
Z-slat, free ventilation cross section 62%.

Material
Aluminium Al Mg Si 0.5

Surface

RAL according to choice / unfinished
Special colors on request

Technical drawing:
Click on the image to zoom.

Technical drawing: Slat 020L

Holdfast

Retainer 12.0

Variant
Clip holder for slat facades and weather protection-/ventilation grids. Retainer 12.1 for weather protection/ventilation grids. Retainer 12.2 for slat facades.

Material
Aluminium Al Mg Si 0.5

Surface

RAL according to choice / unfinished
Special colors on request

Technical drawing:
Click on the image to zoom.

Technical drawing: Retainer 12.0

Support Rail

Frame 602

Variant
Frame profile for weather protection/ventilation grid for enclosed assembly. Used for weather protection slat 020, 020L, 020LL, 020V, 020VFM, 050C, 090.

Material
Aluminium Al Mg Si 0.5

Surface

RAL according to choice / unfinished
Special colors on request

Technical drawing:
Click on the image to zoom.

Technical drawing: Frame 602

Our satisfied customers

A small extract of our references
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Skoda Car Dealership, Munich

MLL-weather protection | System type: Type 775XL

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Gosch am Kliff, Sylt - New building Fish Restaurant

MLL-weather protection | System type: Type 621

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Equipment enclosure Zeppelin, Garching

MLL-Weather Protection |System type: Equipment enclosure

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Ventilation hood - Victoria, Düsseldorf

MLL-Weather Protection | System type: 625