49
B
A
180
200
225
250
280
300
315
355
400
450
500
180
3,1433
2,5092
2,0162
1,6711
1,4773
1,3192
1,1951
1,0336
0,9095
0,8126
0,7429
200
2,9529
2,3545
1,9584
1,5657
1,3991
1,2512
1,1186
0,9673
0,8500
0,7582
0,6919
225
2,7795
2,2032
1,8326
1,4909
1,3226
1,1594
1,0438
0,9231
0,8143
0,7157
0,6562
250
2,6401
2,1012
1,7204
1,3923
1,2172
1,0795
0,9911
0,8568
0,7514
0,6698
0,6120
280
2,5721
2,0417
1,6677
1,3413
1,1577
1,0506
0,9333
0,8313
0,7242
0,6375
0,5984
300
2,5075
1,9822
1,5725
1,2784
1,1373
1,0081
0,9078
0,8075
0,7055
0,6239
0,5627
315
2,4055
1,9108
1,5283
1,2376
1,0897
0,9843
0,8806
0,7752
0,6800
0,6052
0,5525
355
2,3103
1,8343
1,4552
1,2121
1,0676
0,9265
0,8602
0,7412
0,6511
0,5797
0,5287
400
2,2304
1,7697
1,3787
1,1679
1,0217
0,9044
0,8279
0,7140
0,6256
0,5576
0,5083
450
2,1607
1,7153
1,3413
1,1305
1,0013
0,8823
0,8007
0,6902
0,6052
0,5389
0,4913
500
2,1080
1,6711
1,3362
1,1016
0,9452
0,8483
0,7633
0,6715
0,5882
0,5236
0,4777
550
2,0723
1,6507
1,2971
1,0829
0,9231
0,8194
0,7514
0,6613
0,5797
0,5185
0,4726
560
2,0587
1,6320
1,2886
1,0744
0,9061
0,8211
0,7429
0,6545
0,5729
0,5100
0,4658
600
2,0247
1,6116
1,2801
1,0659
0,8959
0,8041
0,7327
0,6443
0,5627
0,5066
0,4590
630
2,0128
1,5946
1,2733
1,0489
0,8857
0,7871
0,7259
0,6392
0,5593
0,4981
0,4539
650
2,0043
1,5742
1,2546
1,0421
0,8687
0,7786
0,7225
0,6324
0,5559
0,4947
0,4505
700
1,9873
1,5674
1,2512
1,0319
0,8517
0,7701
0,7157
0,6290
0,5508
0,4913
0,4471
710
1,9720
1,5623
1,2274
1,0268
0,8534
0,7548
0,7089
0,6256
0,5474
0,4879
0,4437
750
1,9567
1,5419
1,2172
1,0183
0,8483
0,7497
0,6987
0,6188
0,5406
0,4845
0,4386
800
1,9380
1,5351
1,2087
1,0081
0,8432
0,7446
0,6953
0,6137
0,5372
0,4777
0,4352
900
1,9074
1,5096
1,2053
0,9911
0,8228
0,7259
0,6834
0,6035
0,5270
0,4692
0,4284
1000
1,8836
1,4909
1,2002
0,9792
0,7939
0,7106
0,6749
0,5950
0,5202
0,4641
0,4216
1100
1,8615
1,4739
1,1917
0,9673
0,7752
0,7004
0,6664
0,5865
0,5134
0,4573
0,4165
1250
1,8428
1,4569
1,1781
0,9554
0,7735
0,6987
0,6579
0,5814
0,5083
0,4522
0,4114
1400
1,8241
1,4433
1,1696
0,9469
0,7718
0,6970
0,6511
0,5746
0,5032
0,4471
0,4080
1500
1,8139
1,4348
1,1611
0,9418
0,7684
0,6936
0,6477
0,5712
0,4998
0,4454
0,4046
1600
1,8054
1,4280
1,1169
0,9367
0,7667
0,6902
0,6443
0,5678
0,4981
0,4420
0,4029
lindab | we simplify construction
Smoke Control Damper
SDR
2
-M
Lindab reserves the right to make changes without prior notice
Last modified: 2021-10-26
Rev: 2021-03-26
Tab. 8.1.1. Coefficient of local pressure loss
8. Coefficient of local pressure loss
8.1. Coefficient of local pressure loss
ξ
(-)