Type WG-KUL

Combination with a non-return damper

Combinations of external weather louvres and non-return dampers as a protection against the direct ingress of rain, leaves and birds, and to prevent air from flowing against the intended airflow direction.

  • Maximum width of 2000 mm, maximum height of 1665 mm
  • Low differential pressure due to aerofoil blades
  • Low air-regenerated noise
  • All aerodynamic data is measured in aerodynamics and acoustics laboratories
  • Maximum differential pressure: 100 Pa
  • Available in standard sizes and many intermediate sizes
  • Pre-assembled combination, hence fast and easy to install


Optional equipment and accessories

  • Installation subframe
  • Insect screen
  • Powder-coated or anodised surface

Combination of external weather louvre and non-return damper, variant WG-AL-KUL-1 00136504_0


  • Application
  • Description

Application

  • Combinations of Type WG external weather louvres and Type KUL non-return dampers for protecting fresh air and exhaust air openings in air conditioning systems
  • Protection against the direct ingress of rain as well as against leaves and birds
  • Recommended face velocity for fresh air openings: 2 – 2.5 m/s max.
  • Prevention of unwanted airflows against the intended airflow direction when the system is not in operation
  • Blades close automatically when the system is shut down

Special characteristics

  • Any intermediate sizes within the standard size range are available
  • Low installation effort on site since external weather louvre and non-return damper are factory combined and assembled
  • Operating temperature 20 – 80 °C
  • For very large sizes, several combinations can be arranged side by side or on top of each other
  • Maximum pressure of 100 Pa
  • Low differential pressure due to aerofoil blades
  • Non-return dampers are opened and closed by the airflow; no actuator is required

Nominal sizes

  • B: 200 – 1600 mm, in increments of 1 mm
  • H: 180, 345, 510, 675, 840, 1005, 1170, 1335, 1500, 1665 mm (intermediate sizes 183 – 1664 in increments of 1 mm)
  • Any combination of B × H

Variants

  • WG-KUL: External weather louvre made of galvanised sheet steel, with non-return damper
  • WG-AL-KUL: External weather louvre made of aluminium, with non-return damper
  • 1: Fresh air opening
  • 2: Exhaust air opening

Parts and characteristics

  • Border
  • Regular blades and bottom blade
  • Wire mesh
  • Optional insect screen
  • Visible mullion or stabilising mullion at the rear, from B = 1385 mm
  • Casing of non-return damper
  • Blades with low-friction bearings
  • Blade restrictors
  • Blade tip seals
  • Bottom travel stop (angle section)
  • Visible mullion at the rear from B = 1000 mm

Accessories

  • Installation subframe: Installation subframe for the fast and simple installation of external weather louvres

Construction features

External weather louvre

  • Free area of approx. 60 %, with insect screen approx. 45 %
  • Wire mesh at the rear, mesh aperture 20 × 20 × 1.8 mm
  • Optional insect screen at the rear, mesh aperture 1.25 × 1.25 × 0.4 mm
  • Border fixing holes


Non-return damper

  • Casing, material thickness 1.25 mm
  • Blades, material thickness 1 mm
  • Flanges on both sides, suitable for duct connection, with corner holes
  • Additional side bar with fixing holes to accommodate the blade shafts and integral blade restrictors (pins)
  • Blade restrictors prevent the blades from opening beyond a certain angle

Materials and surfaces

  • Border, mullion and blades made of formed galvanised sheet steel or aluminium
  • Wire mesh made of galvanised steel or stainless steel
  • Casing and travel stop of the non-return damper made of galvanised sheet steel
  • Blades made of formed aluminium
  • Mullion (from B = 1000 mm) made of galvanised sheet steel
  • Blade shafts made of brass
  • Side bar made of PVC plastic
  • Blade tip seals made of foamed polyester
  • Blade restrictors made of plastic
  • P1: Powder-coated, RAL CLASSIC colour
  • PS: Powder-coated, NCS or DB colour

Maintenance

  • Maintenance-free as construction and materials are not subject to wear
  • Contamination should be removed as it may lead to corrosion and to increased closed blade air leakage

Technische Information

Function, Technical data, Quick sizing, Specification text, Order code, related Products

  • Function
  • Technical data
  • Specification text
  • Order code
  • related Products
Schematic illustration of WG-KUL 00100145_0
① WG border
② WG regular blades
③ WG bottom blade
④ WG wire mesh
⑤ KUL casing
⑥ KUL blade
⑦ KUL blade tip seal


Functional description

External weather louvres are externally mounted air transfer devices for the fresh air and exhaust air of air conditioning systems. They are installed in external walls and façades. Their narrowly arranged blades give good protection against the direct ingress of rain as well as against leaves and birds.

Under certain unfavourable conditions, such as heavy rain, and depending on the airflow velocity it might happen that slight quantities of water enter together with the air.

This is why the airflow velocity in fresh air openings should not exceed 2 – 2.5 m/s.


Non-return dampers close automatically.

When the system is in operation, the blades open when air flows.

When the system is shut down, the blades close due to their weight. They safely prevent air from flowing against the intended airflow direction.

Nominal sizes

200 × 180 to 1600 × 1665 mm

Free area

Approx. 60 %, with insect screen approx. 45 %

Total differential pressure – exhaust air

55 Pa at 2.5 m/s

Total differential pressure – fresh air

60 Pa at 2.5 m/s

Operating temperature

–20 to 80 °C

Maximum pressure

100 Pa


Combinations of an external weather louvre and a non-return damper.

Rectangular external weather louvre as a protection of air conditioning systems against the direct ingress of rain, leaves and birds into fresh air and exhaust air openings.

Rectangular non-return damper to prevent air from flowing against the intended airflow direction.

Ready-to-install component which consists of a border, aerofoil rain defence blades, and a wire mesh at the rear.

Non-return damper which consists of a casing, blades with low-friction bearings, and travel stop and sealing parts.

Special characteristics

  • Any intermediate sizes within the standard size range are available
  • Low installation effort on site since external weather louvre and non-return damper are factory combined and assembled
  • Operating temperature 20 – 80 °C
  • For very large sizes, several combinations can be arranged side by side or on top of each other
  • Maximum pressure of 100 Pa
  • Low differential pressure due to aerofoil blades
  • Non-return dampers are opened and closed by the airflow; no actuator is required

Materials and surfaces

  • Border, mullion and blades made of formed galvanised sheet steel or aluminium
  • Wire mesh made of galvanised steel or stainless steel
  • Casing and travel stop of the non-return damper made of galvanised sheet steel
  • Blades made of formed aluminium
  • Mullion (from B = 1000 mm) made of galvanised sheet steel
  • Blade shafts made of brass
  • Side bar made of PVC plastic
  • Blade tip seals made of foamed polyester
  • Blade restrictors made of plastic
  • P1: Powder-coated, RAL CLASSIC colour
  • PS: Powder-coated, NCS or DB colour

Technical data

  • Nominal sizes: 200 × 180 to 1600 × 1665 mm
  • Free area: approx. 60 %, with insect screen approx. 45 %
  • Total differential pressure – exhaust air: 55 Pa at 2.5 m/s
  • Total differential pressure – fresh air: 60 Pa at 2.5 m/s
  • Operating temperature: –20 – 80 °C
  • Maximum pressure: 100 Pa

Sizing data

  • V _______________________ [m³/h]
  • Δpt _______________________ [Pa]

Air-regenerated noise

  • LWA _______________________ [dB(A)]

This specification text describes the general properties of the product. Texts for variants can be generated with our Easy Product Finder design programme.

00240721_0

 Type
WG-KUL       Combination of external weather louvre and non-return damper

 Material – WG
       No entry: galvanised steel
AL       Aluminium

 Construction – WG
       No entry: wire mesh
1       Insect screen, galvanised steel
2       Wire mesh, stainless steel (only WG-AL)
3       Insect screen and wire mesh made of stainless steel (only WG-AL)

 WG border
       No entry: With fixing holes
U       Without fixing holes

 

 Airflow direction
1       Fresh air opening
2       Exhaust air opening

 Nominal size [mm]
       B × H

 Installation subframe – WG
       No entry: None
ER       With (not for construction without fixing holes)

 Surface – WG
       No entry: standard construction
P1       Powder-coated, RAL Classic colour
PS       Powder-coated, DB colour
       Only for WG-AL
S2       Anodised to EURAS standard, E6-C-… (31 to 35)
S3       Anodised to EURAS standard, E6-C-0

       Gloss level
       RAL 9010 50 %
       RAL 9006 30 %
       All other RAL colours 70 %

Notes on the order code

⑥ The nominal size equals the dimensions of the duct connected to the non-return damper. Depending on the size of the installation opening, an installation subframe may have to be used.

  • Installation opening without installation subframe: B + 95 mm, H + 95 mm
  • Installation opening with installation subframe: B + 115 mm, H + 115 mm

Order example: WG–KUL–1/1600×600/ER

Material – WG

Galvanised steel

Construction – WG

Wire mesh

Direction of airflow

Fresh air opening

Nominal size

1600×600 mm

Installation subframe – WG

With

Surface – WG

Standard construction


 

Variants, Dimensions and weight

  • Variants
  • Dimensions and weight

WG-KUL

Variants

  • External weather louvre made of galvanised sheet steel, with non-return damper
  • 1: Fresh air opening
  • 2: Exhaust air opening

Nominal sizes

  • B: 200 – 1600 mm, in increments of 1 mm
  • H: 180, 345, 510, 675, 840, 1005, 1170, 1335, 1500, 1665 mm (intermediate sizes 183 – 1664 in increments of 1 mm)
  • Any combination of B × H

Parts and characteristics

  • Border
  • Regular blades and bottom blade
  • Wire mesh
  • Optional insect screen
  • Visible mullion or stabilising mullion at the rear, from B = 1385 mm
  • Casing of non-return damper
  • Blades with low-friction bearings
  • Blade restrictors
  • Blade tip seals
  • Bottom travel stop (angle section)
  • Visible mullion at the rear from B = 1000 mm

Construction features

External weather louvre

  • Free area of approx. 60 %, with insect screen approx. 45 %
  • Wire mesh at the rear, mesh aperture 20 × 20 × 1.8 mm
  • Optional insect screen at the rear, mesh aperture 1.25 × 1.25 × 0.4 mm
  • Border fixing holes


Non-return damper

  • Casing, material thickness 1.25 mm
  • Blades, material thickness 1 mm
  • Flanges on both sides, suitable for duct connection, with corner holes
  • Additional side bar with fixing holes to accommodate the blade shafts and integral blade restrictors (pins)
  • Blade restrictors prevent the blades from opening beyond a certain angle

Materials and surfaces

External weather louvre

  • P1: Powder-coated, RAL CLASSIC colour
  • PS: Powder-coated, DB colour

WG-AL-KUL

Variant

  • External weather louvre made of aluminium, with non-return damper
  • 1: Fresh air opening
  • 2: Exhaust air opening

Nominal sizes

  • B: 200 – 1600 mm, in increments of 1 mm
  • H: 180, 345, 510, 675, 840, 1005, 1170, 1335, 1500, 1665 mm (intermediate sizes 183 – 1664 in increments of 1 mm)
  • Any combination of B × H

Parts and characteristics

  • Border
  • Regular blades and bottom blade
  • Wire mesh
  • Optional insect screen
  • Visible mullion or stabilising mullion at the rear, from B = 1385 mm
  • Casing of non-return damper
  • Blades with low-friction bearings
  • Blade restrictors
  • Blade tip seals
  • Bottom travel stop (angle section)
  • Visible mullion at the rear from B = 1000 mm

Construction features

External weather louvre

  • Free area of approx. 60 %, with insect screen approx. 45 %
  • Wire mesh at the rear, mesh aperture 20 × 20 × 1.8 mm
  • Optional insect screen at the rear, mesh aperture 1.25 × 1.25 × 0.4 mm
  • Border fixing holes


Non-return damper

  • Casing, material thickness 1.25 mm
  • Blades, material thickness 1 mm
  • Flanges on both sides, suitable for duct connection, with corner holes
  • Additional side bar with fixing holes to accommodate the blade shafts and integral blade restrictors (pins)
  • Blade restrictors prevent the blades from opening beyond a certain angle

Materials and surfaces

External weather louvre

  • P1: Powder-coated, RAL CLASSIC colour
  • PS: Powder-coated, DB colour
  • S2: Anodised to EURAS standard, E6-C-31...35
  • S3: Anodised to EURAS standard, E6-C-0

Materials

Order code detail Part Material Notes

Front border

Formed sheet steel, galvanised

Material thickness 1.5 mm

Blades

Formed sheet steel, galvanised

Material thickness 0.63 mm

Mullion

Formed sheet steel, galvanised

From B = 1385 mm

Wire mesh

Galvanised steel


Casing and travel stop (angle section) of the non-return damper

Galvanised sheet steel


Blades

Formed aluminium


Centre mullion

Galvanised sheet steel

From B = 1000 mm

Blade shafts

Brass


Side bar

PVC plastic


Blade tip seals

Foamed polyester


Blade restrictors

Plastic


AL

Front border

Extruded aluminium sections, material no. EN AW-6060 T66

Material thickness 1.7 mm

AL

Blades

Extruded aluminium sections, material no. EN AW-6060 T66

Material thickness 1.35 mm

AL

Stabilising mullion

Extruded aluminium sections, material no. EN AW-6060 T66

From B = 1385 mm

1

Insect screen

Galvanised steel

Only WG-AL-JZ

2

Wire mesh

Stainless steel, material no. 1.4301

Only WG-AL-JZ

3

Wire mesh

Stainless steel, material no. 1.4301

Only WG-AL-JZ

3

Insect screen

Stainless steel, material no. 1.4301

Only WG-AL-JZ


Surfaces

Order code detail Part Surface Notes

Border and blades

Untreated


P1-RAL ...

Border and blades

Powder-coated, RAL ... CLASSIC


PS-DB ...

Border and blades

Powder-coated, DB ...


S2

Border and blades

Anodised to EURAS standard, E6-C-31...35

Only WG-AL-KUL

S3

Border and blades

Anodised to EURAS standard, E6-C-0

Only WG-AL-KUL


WG-KUL, weight

H B [mm]
H 200 400 600 800 1000 1200 1400 1600
mm kg

180

9

10

14

18

22

26

30

34

345

12

14

18

22

26

30

34

38

510

15

18

22

27

31

36

41

46

675

17

22

27

33

38

44

49

54

840

18

24

29

35

40

46

52

58

1005

21

27

33

40

46

53

59

65

1170

23

31

38

45

52

59

66

72

1335

25

33

41

49

56

64

71

79

1500

27

35

43

51

59

67

75

83

1665

30

38

46

54

62

70

78

86


WG-AL-KUL, weight

H B [mm]
H 200 400 600 800 1000 1200 1400 1600
mm kg

180

8

9

13

17

20

24

27

30

345

11

12

16

20

23

27

29

33

510

14

16

19

24

27

31

34

38

675

15

20

24

29

33

38

42

47

840

16

21

25

30

34

40

44

50

1005

18

24

28

35

40

47

51

56

1170

20

27

33

41

46

52

56

62

1335

21

29

37

45

50

56

61

68

1500

24

32

39

47

53

59

65

72

1665

27

36

42

50

56

63

68

75


Installation details, Basic information and nomenclature

  • Installation details
  • Basic information and nomenclature

Installation and commissioning

  • With or without installation subframe
  • Vertical installation
  • Straight upstream section required (at least B + H) on the pressure side of fans
  • Ensure a gradual start-up of fans to avoid a sudden pressure increase

Nomenclature

LWA [dB(A)]

A-weighted sound power level of air-regenerated noise for the louvre

A [m²]

Upstream cross section

v [m/s]

Airflow velocity based on the upstream cross section

vt [m/s]

Airflow velocity based on the upstream cross section (type NL)

V [m³/h] and [l/s]

Volume flow rate

Δpt [Pa]

Total differential pressure


All sound power levels are based on 1 pW.

Principal dimensions

B [mm]

Duct width

B₁ [mm]

Duct width for subdivided louvres

H [mm]

Duct height

H₁ [mm]

Duct height for subdivided louvres

n [ ]

Number of flange screw holes

m [kg]

Weight

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Il nostro dipartimento per la gestione delle richieste ti contatterà appena possibile.
Per domande di carattere generale riguardanti i nostri prodotti o servizi, è possibile contattare:
Tel.: +39 029829741 | Fax: +39 029829760