WG-KUL

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]
• Δp_t _______________________ [Pa]

Air-regenerated noise

• L_WA _______________________ [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.

Accessories

Type Installation subframe

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

Surfaces

Nomenclature

L_WA [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

v_t [m/s]

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

V [m³/h] and [l/s]

Volume flow rate

Δp_t [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