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KUL

For installation into ductwork

Non-return dampers prevent unwanted airflows against the intended airflow direction when the system is not in operation

  • Maximum differential pressure: 100 Pa

  • Casing with flange that fits rectangular ducts

  • Maximum width of 1600 mm, maximum height of 1615 mm

  • Available in standard sizes and intermediate sizes (in increments of 1 mm)

  • Non-return damper with formed aluminium blades for normal requirements; blades are fitted with seals

Optional equipment and accessories

  • Casing with flange holes

  • Installation subframe (only KUL-G)

  • Powder coating, RAL CLASSIC colour

General information

Application

  • Non-return dampers for installation in ducts

  • 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

  • Maximum differential pressure 100 Pa


Special features

  • Any intermediate sizes within the standard size range are available

  • Operating temperature -20 to 80 °C

  • Maximum differential pressure: 100 Pa

  • Non-return dampers are opened and closed by the airflow; no actuator is required

  • Non-return damper with formed aluminium blades for normal requirements; blades are fitted with seals for attenuating the blade noise


Nominal sizes

  • B: 200, 400, 600, 800, 1000, 1200, 1400, 1600 mm (intermediate sizes: 201 – 1599 mm in increments of 1 mm)

  • H: 215, 315, 415, 515, 615, 715, 815, 1015, 1215, 1415, 1615 mm (intermediate sizes: 216 – 1614 mm, in increments of 1 mm); the design of the lowest blade and travel stop may differ depending on the damper height

  • Any combination of B × H


Variants

  • KUL: Casing without flange holes

  • KUL-G: Casing with flange holes


Parts and characteristics

  • Casing

  • Blades with low-friction bearings

  • Blade restrictors

  • Blade tip seals

  • Bottom travel stop (angle section)

  • Visible mullion from B = 997 mm


Accessories

  • Installation subframe for the fast and simple installation of mechanical self-powered dampers (only KUL-G)


Construction features

  • Casing, material thickness 1.25 mm

  • Blades, material thickness 1.0 mm

  • Casing with flanges on both sides

  • Additional side bar with fixing holes to accommodate the blade shafts and integral blade restrictors

  • Blade restrictors prevent the blades from opening beyond a certain angle


Materials and surfaces

  • Casing, mullion and travel stop (angle section) made of galvanised sheet steel

  • Blades made of formed aluminium

  • Blade shafts made of brass

  • Side bar made of PVC plastic

  • Blade tip seals made of polyester foam

  • Blade restrictors made of PC plastic

  • P1: Powder-coated, RAL CLASSIC 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

Technical information

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

  • Function
  • TECHNICAL DATA
  • QUICK SIZING
  • SPECIFICATION TEXT
  • ORDER CODE
Schematic illustration of KUL-G KUL_gc_02ai.png

1 Casing with flange holes (KUL-G)

2 Blades (closed)

3 Mullion from B = 997 mm

4 Travel stop (angle section)

5 Blades (open)

6 Blade restrictor

7 Blade tip seals

8 Side bar

Non-return dampers open and 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.

Dimensions and weight

  • DIMENSIONS AND WEIGHT
KUL
  • B: 200 – 1600 mm, intermediate sizes 201 – 1599 in increments of 1 mm
  • H: 215 – 1615 mm, intermediate sizes 216 – 1614 mm in increments of 1 mm



Flow cross section to calculate the airflow velocity

  • A = B × H

Unit of measure for B and H: m


Weight [kg]

H

B

2003004005006008001000120014001600
215233445681011
315234456791011
4153445678101113
5153456679111215
61545567810121317
71545678811131518
81556689913161719
10155679101115181920
121567710111317202022
141567811121518212224
161578811131719222426

Product details

  • PRODUCT DETAILS
Flange holes – KUL-G 

① Even number of holes (hole pitch = 150 mm)
② Uneven number of holes (hole pitch = 150 mm)

KUL-G: Width, no. of flange holes

B

No. of holes n
200 – 3462
347 – 4963
497 – 6464
647 – 7965
797 – 9466
947 – 10967
1097 – 12468
1247 – 13969
1397 – 154610
1547 – 160011



KUL_G: Height, no. of flange holes

H

No. of holes n
215 – 3622
363 – 5123
513 – 6624
663 – 8125
813 – 9626
963 – 11127
1113 – 12628
1263 – 14129
1413 – 156210
1563 – 161511

Installation and commissioning

  • Horizontal airflow: vertical installation required
  • Vertical airflow: Installation into ducts with an upward airflow; horizontal installation
  • Straight upstream section required (at least B + H) on the discharge side of fans
  • Ensure a gradual start-up of fans to avoid a sudden pressure increase
  • Only for installation in internal spaces
  • For external walls the damper should be combined with a Type WG-KUL external weather louvre

The airflow downstream of a fan is characterised by strong turbulence, and there is no uniform velocity profile. As a consequence, the blades of the non-return dampers are not uniformly subject to the airflow, and this may result in individual blades becoming subject to forces that might lead to mechanical damage.
Safe operation requires a straight upstream section of at least B + H.

Downloads

product information

  • Product data sheet Type KUL

    KUL_PD_2022_09_22_DE_en Product data sheet 400 KB pdf

certificates

  • Declaration of conformity or declaration of incorporation Type KUL

    Kul_HC_2024_05_DE_en Declaration of conformity or declaration of incorporation 1.8 MB pdf

  • Non-CE Manufacturer's statement KUL

    KUL_NotCE_2022_02_08_14_43_06_DE_en Certificate 1.8 MB pdf

operation manuals

  • Installation manual Type KUL

    2018/10/A00000053072 Installation manual 440 KB pdf
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