Non-return damper with linkage
Application
Special characteristics
Nominal sizes
Variants
Construction
Accessories
Standards and guidelines
Maintenance
Functional description
Non-return dampers open and close automatically.
When the system is in operation, the blades open when air flows. The blade opening angle depends on the differential pressure and the volume flow rate; for variant ARK-1 the opening angle is limited by adjustable blade restrictors.
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 × 345 to 1200 × 1995 mm |
Volume flow rate range | 690 – 23950 l/s or 2484 – 86220 m³/h at 10 m/s |
Total differential pressure (horizontal airflow) | 115 Pa at 10 m/s |
Total differential pressure (vertical airflow) | 45 Pa at 10 m/s |
Maximum differential pressure in closing direction | 5000 Pa |
Operating temperature | 0 – 80 °C |
Geometric free area – ARK
345 | 0.043 | 0.097 | 0.152 | 0.206 | 0.260 | 0.314 |
675 | 0.088 | 0.198 | 0.309 | 0.419 | 0.529 | 0.639 |
1005 | 0.133 | 0.299 | 0.466 | 0.632 | 0.798 | 0.964 |
1335 | 0.178 | 0.400 | 0.622 | 0.845 | 1.067 | 1.289 |
1665 | 0.223 | 0.501 | 0.779 | 1.058 | 1.336 | 1.614 |
1995 | 0.268 | 0.602 | 0.936 | 1.271 | 1.605 | 1.940 |
Intermediate sizes: Intermediate widths can be interpolated
Quick sizing tables provide a good overview of the volume flow rates with an airflow velocity of 10 m/s. Values for intermediate widths can be interpolated.
ARK: Maximum volume flow rate
345 | 690 | 2484 | 1380 | 4968 | 2070 | 7452 | 2760 | 9936 | 3450 | 12420 | 4140 | 14904 |
675 | 1350 | 4860 | 2700 | 9720 | 4050 | 14580 | 5400 | 19440 | 6760 | 24336 | 8100 | 29160 |
1005 | 2010 | 7236 | 4020 | 14472 | 6040 | 21744 | 8040 | 28944 | 10050 | 36180 | 12050 | 43380 |
1335 | 2670 | 9612 | 5340 | 19224 | 8020 | 28872 | 10700 | 38520 | 13350 | 48060 | 16000 | 57600 |
1665 | 3330 | 11988 | 6660 | 23976 | 10000 | 36000 | 13300 | 47880 | 16650 | 59940 | 20000 | 72000 |
1995 | 3990 | 14364 | 7980 | 28728 | 11950 | 43020 | 15950 | 57420 | 19950 | 71820 | 23950 | 86220 |
Differential pressure
2 | 50 | 135 |
4 | 75 | 125 |
6 | 95 | 105 |
8 | 110 | 65 |
10 | 115 | 45 |
Rectangular non-return dampers to prevent air from flowing against the intended airflow direction through fresh air and exhaust air ducts of air conditioning systems.
Ready-to-install component which consists of a casing, blades with low-friction bearings, and travel stop and sealing parts.
Special characteristics
Construction
Technical data
Sizing data
Air-regenerated noise
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Order example: ARK–1–A2/1000×1995/P1–RAL 7001
Blade mechanism | Blades with adjustable restrictors |
Material | Stainless steel, with aluminium blades |
Construction | Without holes |
Nominal size | 1000 × 1995 mm |
Installation subframe | Without |
Surface | Powder-coated, RAL 7001, silver grey |
Accessories
ARK
Variant
Nominal sizes
Parts and characteristics
Construction features
Materials and surfaces
ARK-1
Variant
Nominal sizes
Parts and characteristics
Construction features
Materials and surfaces
Flow cross section to calculate the airflow velocity
Unit of measure for B and H: m
ARK: Standard sizes, dimensions
345 | 1 | 0 |
675 | 2 | 1 |
1005 | 3 | 1 |
1335 | 4 | 2 |
1665 | 5 | 2 |
1995 | 6 | 2 |
ARK: Intermediate sizes, dimensions
355 – 505 | 1 | 0 | 5 – 80 |
685 – 835 | 2 | 1 | 5 – 80 |
1015 – 1165 | 3 | 1 | 5 – 80 |
1345 – 1495 | 4 | 2 | 5 – 80 |
1675 – 1825 | 5 | 2 | 5 – 80 |
ARK-1: Standard sizes, dimensions
345 | 1 |
675 | 2 |
1005 | 3 |
1335 | 4 |
1665 | 5 |
1995 | 6 |
ARK-1: Intermediate sizes, dimensions
355 – 505 | 1 | 5 – 80 |
685 – 835 | 2 | 5 – 80 |
1015 – 1165 | 3 | 5 – 80 |
1345 – 1495 | 4 | 5 – 80 |
1675 – 1825 | 5 | 5 – 80 |
ARK, ARK-1: Weights
345 | 8 | 10 | 12 | 15 | 18 | 21 |
675 | 12 | 16 | 19 | 23 | 27 | 32 |
1005 | 17 | 22 | 26 | 31 | 36 | 41 |
1335 | 22 | 28 | 33 | 39 | 45 | 51 |
1665 | 27 | 34 | 40 | 47 | 54 | 61 |
1995 | 32 | 40 | 47 | 55 | 63 | 71 |
ARK, ARK-1, ARK2: width, no. of flange holes
200 – 287 | 1 |
288 – 537 | 2 |
538 – 787 | 3 |
788 – 1037 | 4 |
1038 – 1200 | 5 |
ARK, ARK-1, ARK2: height, no. of flange holes
345 – 461 | 2 |
462 – 711 | 3 |
712 – 961 | 4 |
962 – 1211 | 5 |
1212 – 1461 | 6 |
1462 – 1711 | 7 |
1712 – 1961 | 8 |
1962 – 1995 | 9 |
Installation and commissioning
ARK
ARK-1
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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Contact
We are here for you
Please specify your message and type of request
Tel.: +49 (0)2845 / 202-0 | Fax: +49 (0)2845/202-265
Contact
Thank you for your message!
Your message is send and will be processed shortly.
Our department for Service-Requests will contact you asap.
For general question regarding products or services you can also call:
Tel.: +49 (0)2845 / 202-0 | Fax: +49 (0)2845/202-265