Application
Special characteristics
Nominal sizes
Variants
Parts and characteristics
Accessories
Construction features
Materials and surfaces
Maintenance
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.
Sizing example
Given data
V =2000 l/s (7200 m³/h)
v = 2.5 m/s
Fresh air
Maximum width: 1000 mm
Quick sizing
UL-2/1000×815
Calculation procedure
A = 1.000 × 0.815 = 0.815 m²
v = V ∕ A = 2000 ∕ 0.815 ( ∕ 1000) = 2.5 m/s
Δpt = 30 Pa
UL, KUL: Width 200 – 600 mm, volume flow rate at 2.5 m/s
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
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
0.5 | 10 | 12 |
1 | 16 | 18 |
2 | 20 | 24 |
3 | 25 | 30 |
4 | 30 | 40 |
5 | 40 | 55 |
6 | 45 | 65 |
Rectangular non-return dampers to prevent air from flowing against the intended airflow direction; for installation into internal walls and into rectangular ducts.
Ready-to-install component which consists of a border, blades with low-friction bearings, and travel stop and sealing parts.
Special characteristics
Materials and surfaces
Technical data
Sizing data
Air-regenerated noise
|
|
Order example: UL–2/600×1615/ER
Direction of airflow | Towards the rear |
Nominal size | 600 × 1615 mm |
Installation subframe | With |
Surface | Standard construction |
Flow cross section to calculate the airflow velocity
Unit of measure for B and H: m
UL, weights
215 | 3 | 3 | 3 | 4 | 4 | 5 | 6 | 7 | 8 | 9 |
315 | 3 | 3 | 4 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
415 | 3 | 4 | 4 | 5 | 5 | 6 | 7 | 8 | 9 | 10 |
515 | 4 | 4 | 5 | 5 | 6 | 7 | 8 | 9 | 10 | 11 |
615 | 4 | 5 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 |
715 | 5 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 |
815 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 |
1015 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 |
1215 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 |
1415 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 |
1615 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 |
UL: Standard sizes, width, no. of flange holes
200 | 1 | – | 100 |
300 | 1 | – | 150 |
400 | 2 | 303 | 48.5 |
500 | 2 | 403 | 48.5 |
600 | 3 | 252 | 48.5 |
800 | 3 | 352 | 48.5 |
1000 | 3 | 452 | 48.5 |
1200 | 3 | 552 | 48.5 |
1400 | 3 | 652 | 48.5 |
1600 | 4 | 501 | 48.5 |
UL: Standard sizes, height, no. of flange holes
215 | 1 | – | 107.5 |
315 | 1 | – | 157.5 |
415 | 1 | – | 207.5 |
515 | 1 | – | 257.5 |
615 | 2 | 320 | 147.5 |
715 | 2 | 420 | 147.5 |
815 | 3 | 260 | 147.5 |
1015 | 3 | 360 | 147.5 |
1215 | 3 | 460 | 147.5 |
1415 | 3 | 560 | 147.5 |
1615 | 4 | 440 | 147.5 |
UL: Intermediate sizes, width, no. of flange holes
201 – 396 | 1 | – | B ∕ 2 |
397 – 596 | 2 | B − 97 | 48.5 |
597 – 1596 | 3 | (B − 97) ∕ 2 | 48.5 |
1597 – 1599 | 4 | (B − 97) ∕ 3 | 48.5 |
UL: Intermediate sizes, height, no. of flange holes
216 – 614 | 1 | – | H ∕ 2 |
616 – 814 | 2 | H − 295 | 147.5 |
816 – 1614 | 3 | (H − 295) ∕ 2 | 147.5 |
Installation and commissioning
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