NBL back flow fiber glass cooling tower　　　
　　As the motor capacity is comparative lower than the other homogenous products, all the cooling towers we produced are power saving. The water temperature of low noise and super low noise types generally could be reduced 3-8℃, suitable for the air condition cooling and other general water cooling.
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　　Based on the low noise cooling tower, super low noise tower adopts another series noise control methods. The standard noise level is  ～5dB（A）lower than the relevant low noise  products. They suit to the quiet required places like hotels, hospitals, public building and the places around civil residence. The basic apparatus, companion pipeline, motor voltage are the same with relative low noise type products, the cooling water volume is also the same.
　　 The moderate and high temperature industry type cooling tower could reduced 10-25℃ of water temperature. Diameter of tower, flow volume, air pressure, power and filling material are added of this type. They are suitable for the high temperature water cooling in industry. This industry tower is with high grade thermodynamic, the customers could choose a much suitable one. Meaning of codes: DBNL3-100type,D low noise, B fiber glass, Nback flow style, L-cooling tower, 3-the third design ,100-flow volume 100m3/h in standard condition, GBNL3-100type, G-for industry, high temperature cooling, CDBNL3-100 ,CDsuper low noise.
　　Parameter of DBL3 series super low noise fiber glass back flow cooling tower:
Type Parameter Water volume when T=28℃m3/h Water volume when T=27℃m3/h Flow volume m3/h Diameter of fan blade（mm） Power（KW） Weight（kg） Pressure（104Pa） Noise（dB） Diameter（Dm）
Δt=5℃ Δt=8℃ Δt=5℃ Δt=8℃ State weight Weight during running

D

DBNL3-12 12 9 15 10 7200 700 0.6 206 484 1.96 54.0 1.5
DBNL3-20 20 15 24 17 12400 800 0.8 230 544 2.00 54.0 1.5
DBNL3-30 30 22 35 27 18000 1200 0.8 406 956 2.21 55.0 1.8
DBNL3-40 40 30 46 34 21500 1200 1.1 478 1118 2.60 55.0 1.8
DBNL3-50 50 37 57 44 28000 1400 1.5 596 1480 2.65 55.0 2.1
DBNL3-60 60 44 68 51 32300 1400 1.5 642 1592 2.90 56.0 2.1
DBNL3-70 70 51 79 60 39200 1600 2.2 790 2064 2.78 56.0 2.5
DBNL3-80 80 61 92 70 43400 1600 2.2 875 2243 3.03 56.5 2.5
DBNL3-100 100 74 114 86 56000 1800 3.0 973 3064 2.86 57.0 3.0
DBNL3-125 125 92 142 108 67200 1800 4.0 1063 3290 3.15 58.0 3.0
DBNL3-150 150 112 171 129 84000 2400 4.0 1695 4125 2.90 58.5 3.6
DBNL3-175 175 131 200 150 94000 2400 5.5 1835 4461 3.15 59.5 3.6
DBNL3-200 200 153 231 180 112000 2800 5.5 2132 5592 3.01 60.0 4.2
DBNL3-250 250 186 283 215 134300 2800 7.5 2344 6365 3.26 61.0 4.2
DBNL3-300 300 225 334 260 168000 3400 7.5 3558 9229 3.50 61.0 5.0
DBNL3-350 350 267 395 304 187400 3400 11.0 3860 9906 3.75 61.5 5.0
DBNL3-400 400 301 455 341 224000 3800 11.0 4300 12086 3.60 62.0 5.9
DBNL3-450 450 343 514 387 242000 3800 11.0 4646 13464 3.85 62.0 5.9
DBNL3-500 500 375 576 427 280000 4200 15.0 5768 16258 3.70 62.0 6.6
DBNL3-600 600 454 680 516 302200 4200 18.5 6570 18360 4.20 63.0 6.6
DBNL3-700 700 528 790 600 39350 5000 18.5 6915 23194 3.95 63.0 7.6
DBNL3-800 800 590 890 685 408000 5000 22.0 7983 25982 4.45 63.0 7.6
DBNL3-900 900 685 1035 790 505200 6000 22.0 8934 32568 4.25 63.5 8.6
DBNL3-1000 1000 783 1139 880 510300 6000 30.0 10560 36420 4.75 64.0 8.6
Instruction:
1.The noise level is measured in standard point D, tower diameter long, and 1.5m above the ground.
2.This type is designed when watery ball temperature T=28℃, flow-in water temperature t1=37℃,flow-out water temperature t2=32℃, that is the reduced water temperature isΔt=5℃, near to  t2-t=4℃.
3.when t=28℃，Δt=5℃ and 8℃，t2=32℃ and T=27℃，Δt=5℃ and 8℃，t2=32℃ cooled water volume could be referred from the table. Another volume should be referred from thermodynamic curve.
4. water pressure refers to the one from pipeline connection . 1kgt/cm2=9.8×104Pa, so the water pressures of this type is between 0.2 to 0.49 kgt/cm2.
　　Parameter of DBL3 series super low noise fiber glass back flow cooling tower
Type  Parameter Water volume when T=28℃m3/h Water volume when T=27℃m3/h Dimesion Flow volume
m3/h 		Diameter（mm） Power（kw）

Weight（kg）

Pressure
104Pa 		Noise（dB） Diameter
（Dm）
Δt=5℃ Δt=8℃ Δt=5℃ Δt=8℃ Max Height Max Diameter State weight Weight during running

D

10m 16m
DBNL3-12 12 9 15 10 2972 1600 7200 700 0.6 306 584 1.96 50.0 37.1 33.5 1.5
DBNL3-20 20 15 24 17 3062 2000 12400 800 0.8 330 644 2.00 50.0 36.3 32.6 1.5
DBNL3-30 30 22 35 27 3281 2400 18000 1200 0.8 546 1100 2.21 51.0 39.5 35.9 1.8
DBNL3-40 40 30 46 34 3781 2400 21500 1200 1.1 618 1258 2.60 51.0 39.5 35.9 1.8
DBNL3-50 50 37 57 44 3816 2800 28000 1400 1.5 756 1640 2.65 51.0 40.7 37.1 2.1
DBNL3-60 60 44 68 51 4066 2800 32300 1400 1.5 950 1752 2.90 52.0 41.7 38.1 2.1
DBNL3-70 70 51 79 60 4152 3300 39200 1600 2.2 998 2272 2.78 52.0 43.0 39.0 2.5
DBNL3-80 80 61 92 70 4403 3300 43400 1600 2.2 1083 2451 3.03 52.5 43.5 39.5 2.5
DBNL3-100 100 74 114 86 4440 3900 56000 1800 3.0 1230 3322 2.86 53.0 46.0 42.0 3.0
DBNL3-125 125 92 142 108 4690 3900 67200 1800 4.0 1320 3422 3.15 54.0 46.7 43.4 3.0
DBNL3-150 150 112 171 129 4765 4600 84000 2400 4.0 2045 4475 2.90 54.0 47.5 44.1 3.6
DBNL3-175 175 131 200 150 5015 4600 94300 2400 5.5 2182 4808 3.15 55.0 48.5 45.1 3.6
DBNL3-200 200 153 231 180 5194 5700 112000 2800 5.5 2663 6123 3.01 55.0 49.6 46.3 4.2
DBNL3-250 250 186 283 215 5444 5700 134300 2800 7.5 2875 6892 3.26 56.0 50.6 47.3 4.2
DBNL3-300 300 225 334 260 5713 6400 168000 3400 7.5 4132 9805 3.50 56.0 51.8 48.5 5.0
DBNL3-350 350 267 395 304 5963 6400 187400 3400 11.0 4434 10479 3.75 56.5 52.3 49.0 5.0
DBNL3-400 400 301 455 841 6269 7400 224000 3800 11.0 4995 12782 3.60 57.0 53.8 50.7 5.9
DBNL3-450 450 343 514 387 6519 7400 242000 3800 11.0 5341 14160 3.85 57.0 53.8 50.7 5.9
DBNL3-500 500 375 576 427 5890 8200 280000 4200 15.0 6612 17102 3.70 57.0 55.0 51.9 6.6
DBNL3-600 600 454 680 516 7390 8200 302200 4200 18.5 7414 19204 4.20 68.0 56.0 52.4 6.6
Instruction:
1.The noise level is less than 72dB(A) when star type gear retarder is used.  When dynamic retarder is used, its noise level is the same with  low noise type products.
2.The listed cooled water volume is measured when ball watery temperature is t=27℃ and t=28℃, other conditions see the follow: when water reduced temperature Δt=10℃, the flow-in water temperature t1=43℃, flow-out water volume t2=33℃. When water reduced temperature Δt=20℃ and 25℃ , flow-in water temperature t1 is 60 and 55℃, flow-out water temperature t2=35℃.
3.Water pressure is measure at the pipeline connection. As 1kgt/cm2=9.8×104Pa, the water pressure of this type products is between 0.3 to 0.5kgt/cm2.
　　 Installation size of DBL3 GBNL3 cooling tower
Type L L1 L2 R0 ф0 ф1 ф2 ф3 ф4 R B b1 b2 Dg1 Dg2 Dg3 Dg4 Dg5 Dg6
GBNL3 DBNL3
  12 2033 1783 100 - 1210 1100 700     550 300 - - 70 80 25 15 15 25
  20 2123 1873 100 - 1460 1350 800     660 300 - - 70 80 25 15 15 25
  30 2342 2044 100 - 1912 1800 1200     820 400 - - 80 100 25 15 15 25
  40 2842 2542 100 - 1912 1800 1200     820 400 - - 80 100 25 20 20 25
  50 2830 2530 100 - 2215 2100 1400     985 500 - - 100 125 32 20 20 25
  60 3080 2780 100 - 2215 2100 1400     985 500 - - 100 125 32 20 20 25
  70 3194 2790 400 - 2629 2500 1600     1214 800 - - 150 200 40 20 20 40
  80 3440 3040 400 - 2629 2500 1600     1214 800 - - 150 200 40 20 20 40
70 100 3426 2926 400 - 3134 3000 1800     1415 1100 - - 150 200 40 20 20 40
80 125 3676 3276 400 - 3134 3000 1800     1415 1100 - - 150 200 40 20 20 40
100 150 3753 3353 200 - 3732 3600 2400 410 450 1836 - 300 320 200 250 80 25 25 50
125 175 3803 3603 200 - 3732 3600 2400 410 450 1836 - 300 320 200 250 80 25 25 50
150 200 3835 3615 220 - 4342 4200 2800 460 500 2193 - 350 370 200 250 80 32 32 50
175 250 4085 3865 220 - 4342 4200 2800 460 500 2193 - 350 370 200 250 80 32 32 50
200 300 4223 3993 230 - 5134 5000 3400 540 600 2606 - 460 460 250 300 80 40 40 50
250 350 4473 4243 230 - 5134 5000 3400 540 600 2606 - 460 460 250 300 80 40 40 50
300 400 4618 4388 230 - 6044 5900 3800 580 640 3030 - 460 460 250 300 100 50 50 50
350 450 4868 4638 230 - 6044 5900 3800 580 640 3030 - 460 460 250 300 100 50 50 50
400 500 5219 4913 300 - 6746 6600 4200 660 720 3369 - 560 560 300 350 100 50 50 80
450 600 5719 5419 300 - 6746 6600 4200 660 720 3369 - 560 560 300 350 100 50 50 80
500 700 5889 5589 300 - 7766 7600 5000 760 820 3890 - 560 560 350 400 100 80 80 80
600 800 6089 5789 300 - 7766 7600 6000 760 900 3890 - 560 560 350 400 100 80 80 80
700 900 6089 5740 300 - 8836 8600 6000 840 900 4422 - 650 650 400 450 100 80 80 80
800 1000 6580 6240 300 - 8836 8600   840 900 4422 - 650 650 400   100 80 80 80

　　Parameter of GBNL3 industry style back flow fiber glass cooling tower
Type       Parameter Cooling water volume when T=28℃（m3/s） Cooling water volume when T=27℃（m3/s） Dimesion（mm