00136534_0
Non-return damper, variant KUL-G


00137425_0
Bearings


00137428_0
Casing and duct connection


00136534_0
00137425_0
00137428_0

Type 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 U-channel connection suitable for rectangular ducts
  • Available in standard sizes and many intermediate sizes
  • Non-return damper with formed aluminium blades for normal requirements; blades are fitted with seals for sound attenuation


Optional equipment and accessories

  • Installation subframe
  • Powder coating (RAL or DB)

Application

Application

  • Type KUL non-return damper for installation into ductwork
  • 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 characteristics

  • Any intermediate sizes within the standard size range are available
  • operating temperature: –20 – 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 sound attenuation

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)
  • Any combination of B × H

Description

Variants

  • KUL: Non-return damper, duct connection without flange holes
  • KUL-G: Non-return damper, duct connection 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: Installation subframe for the fast and simple installation of mechanically self-powered dampers

Construction features

  • Casing, material thickness 1.25 mm
  • Blades, material thickness 1.0 mm
  • Flanges on both sides, suitable for duct connection
  • 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

  • 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 foamed polyester
  • Blade restrictors made of plastic

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, Related products

  • Function
  • Technical data
  • QUICK SIZING
  • Specification text
  • Order code
  • Related products
Schematic illustration of KUL 00106691_0.
① Border
② Blades (closed)
③ Mullion from B = 997 mm
④ Blades (open)
⑤ Blade restrictor
⑥ Seal


Functional description

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.

Nominal sizes

200 × 215 to 1600 × 1615 mm

Volume flow rate range

110 – 6460 l/s or 396 – 23256 m³/h at 2.5 m/s

Total differential pressure

25 Pa at 2.5 m/s

Maximum differential pressure in closing direction

100 Pa

Operating temperature

–20 to 80 °C


Quick sizing tables provide a good overview of the volume flow rates with an airflow velocity of 2.5 m/s. Intermediate values can be interpolated.

UL, KUL: Width 200 – 600 mm, volume flow rate at 2.5 m/s

H B [mm]
H 200 300 400 500 600
mm l/s m³/h l/s m³/h l/s m³/h l/s m³/h l/s m³/h

215

110

396

160

576

215

774

270

972

325

1170

315

160

576

235

846

315

1134

395

1422

475

1710

415

210

756

310

1116

415

1494

520

1872

625

2250

515

260

936

385

1386

515

1854

645

2322

775

2790

615

310

1116

460

1656

615

2214

770

2772

925

3330

715

360

1296

535

1926

715

2574

895

3222

1070

3852

815

410

1476

610

2196

815

2934

1020

3672

1220

4392

1015

510

1836

760

2736

1020

3672

1270

4572

1520

5472

1215

610

2196

910

3276

1220

4392

1520

5472

1820

6552

1415

710

2556

1060

3816

1420

5112

1770

6372

2120

7632

1615

810

2916

1210

4356

1620

5832

2020

7272

2420

8712


UL, KUL: Width 800 – 1600 mm, volume flow rate at 2.5 m/s

H B [mm]
H 800 1000 1200 1400 1600
mm l/s m³/h l/s m³/h l/s m³/h l/s m³/h l/s m³/h

215

430

1548

540

1944

645

2322

755

2718

860

3096

315

630

2268

790

2844

945

3402

1100

3960

1260

4536

415

830

2988

1040

3744

1250

4500

1450

5220

1660

5976

515

1030

3708

1290

4644

1550

5580

1800

6480

2060

7416

615

1230

4428

1540

5544

1850

6660

2150

7740

2460

8856

715

1430

5148

1790

6444

2150

7740

2500

9000

2860

10296

815

1630

5868

2040

7344

2450

8820

2850

10260

3260

11736

1015

2030

7308

2540

9144

3050

10980

3550

12780

4060

14616

1215

2430

8748

3040

10944

3650

13140

4250

15300

4860

17496

1415

2830

10188

3540

12744

4250

15300

4950

17820

5660

20376

1615

3230

11628

4040

14544

4850

17460

5650

20340

6460

23256


Differential pressure

v Δpt
m/s Pa

0.5

10

1

15

2

20

3

25


Rectangular non-return dampers to prevent air from flowing against the intended airflow direction; for installation into ductwork.

Ready-to-install component 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
  • operating temperature: –20 – 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 sound attenuation

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 foamed polyester
  • Blade restrictors made of plastic

Technical data

  • Nominal sizes: 200 × 215 to 1600 × 1615 mm
  • Volume flow rate range: 110 – 6460 l/s or 396 – 23256 m³/h at 2.5 m/s
  • Total differential pressure: 25 Pa at 2.5 m/s
  • Maximum differential pressure in closing direction: 100 Pa
  • Operating temperature: –20 to 80 °C

Sizing data

  • V __________________ [m³/h]
  • Δpst __________________ [Pa]

Air-regenerated noise

  • LWA __________________ [dB(A)]

00135481_0

 Type
KUL       Non-return damper

 Construction
       No entry: duct connection without flange holes
G       Duct connection, flange holes on both sides

 Nominal size [mm]
       B × H

 

 Installation subframe
       No entry: none
ER       With (only KUL-G)

 Surface
       No entry: standard construction
P1       Powder-coated,        RAL CLASSIC colour
PS       Powder-coated, DB colour

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

Order example: KUL–G/600×1200

Construction

Duct connection, flange holes on both sides

Nominal size

600 × 1200 mm

Installation subframe

Without

Surface

Standard construction


 

Accessories

Type Installation subframe

Dimensions and weight, Product details

  • Dimensions and weight
  • Product details
KUL 00102513_0


  • 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
  • The weight for the next larger size applies

Flow cross section to calculate the airflow velocity

  • A = B × H

Unit of measure for B and H: m

KUL: Weights

H B [mm]
H 200 300 400 500 600 800 1000 1200 1400 1600
mm kg

215

2

3

3

4

4

5

6

8

10

11

315

2

3

4

4

5

6

7

9

10

11

415

3

4

4

5

6

7

8

10

11

13

515

3

4

5

6

6

7

9

11

12

15

615

4

5

5

6

7

8

10

12

13

17

715

4

5

6

7

8

8

11

13

15

18

815

5

6

6

8

9

9

13

16

17

19

1015

5

6

7

9

10

11

15

18

19

20

1215

6

7

7

10

11

13

17

20

20

22

1415

6

7

8

11

12

15

18

21

22

24

1615

7

8

8

11

13

17

19

22

24

26


Flange holes – KUL 00146052_0
① Even number of holes (hole pitch = 150 mm)
② Uneven number of holes (hole pitch = 150 mm)


KUL: Width, no. of flange holes

Width No. of holes
Width n
mm –

200 – 346

2

347 – 496

3

497 – 646

4

647 – 796

5

797 – 946

6

947 – 1096

7

1097 – 1246

8

1247 – 1396

9

1397 – 1546

10

1547 – 1600

11


KUL: Height, no. of flange holes

Height No. of holes
H n
mm –

215 – 362

2

363 – 512

3

513 – 662

4

663 – 812

5

813 – 962

6

963 – 1112

7

1113 – 1262

8

1263 – 1412

9

1413 – 1562

10

1563 – 1615

11


Installation details, Basic information and nomenclature

  • Installation details
  • Basic information and nomenclature
Installation into an internal wall, without installation subframe
00147237_0


00147237_0
00100052_0
00102532_0

Installation and commissioning

  • Horizontal airflow: Vertical installation
  • Vertical airflow: Installation into ducts with an upward airflow; horizontal installation
  • Straight upstream section required (at least B + H) on the positive pressure 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

Nomenclature

LWA [dB(A)]

A-weighted sound power level of air-regenerated noise for the mechanically self-powered damper

A [m²]

Upstream cross section

v [m/s]

Airflow velocity based on the upstream cross section

V [m³/h] and [l/s]

Volume flow rate

Δpst [Pa]

Static differential pressure

Δpt [Pa]

Total differential pressure


All sound power levels are based on 1 pW.

Principal dimensions

B [mm]

Duct width

H [mm]

Duct height

n [ ]

Number of flange screw holes

m [kg]

Weight

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