KUL

Casing with flange holes (KUL-G)

Blades with restrictor

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

Schematic illustration of KUL-G

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.

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. Precise intermediate values can be calculated with our Easy Product Finder design program.

KUL, width 200 – 600 mm, volume flow rate at 2.5 m/s

H	B
	200		300		400		500		600
	[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

KUL, width 800 – 1600 mm, volume flow rate at 2.5 m/s

H	B
	800		1000		1200		1400		1600
	[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 [m/s]	Δp_t [Pa]
0.5	11
1	14
2	20
3	26

Specification text

Rectangular non-return dampers to prevent air from flowing against the intended airflow direction; for installation into internal walls and into rectangular ducts. Casing with flange holes if required. Ready-to-install component which consists of a casing, blades with low-friction bearings, blade restrictors and blade tip seals.

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

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

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: 23 Pa at 2.5 m/s
Maximum differential pressure in closing direction: 100 Pa
Operating temperature: -20 to 80 °C

Sizing data

qᵥ [m³/h] volume flow rate
Δp_t [Pa] total differential pressure
v [m/s] airflow velocity

KUL	–	G	/	800 × 1015	/	ER	/	P1 - RAL 9010
\|		\|		\|		\|		\|
1		2		3		4		5

1 Type
KUL Non-return damper

2 Construction
No entry: casing without flange holes
G Casing with flange holes

3 Nominal size [mm]
Specify size (width × height)

4 Installation subframe
No entry: without installation subframe
ER With Installation subframe (only with construction G)

5 Surface
No entry: standard construction
P1 Powder-coated, specify RAL CLASSIC colour

Gloss level
RAL 9010 GU50
RAL 9006 GU30
All other RAL colours GU70

Order example: KUL-G/800×1015/ER/P1-RAL9010

Type	KUL
Construction	Casing with flange holes
Nominal size [mm]	Width 800, height 1015
Installation subframe	With installation subframe
Surface	Powder-coated RAL 9010, pure white

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
H	200	300	400	500	600	800	1000	1200	1400	1600
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

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 – 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_G: Height, no. of flange holes

H	No. of holes n
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 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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