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CND and CNF
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Catalog excerpts

CND and CNF - 1

Novenco Centrifugal Fans CND and CNF April 2007

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CND and CNF - 2

Product Facts Product and Use Motor Installation Size Corrosion Categories Centrifugal fans of type CND and CNF are light, compact low-pressure and medium fans with high efficiency, low sound level and good operating economy, designed for universal installation. Motor size for CND-CNF, directly coupled. Centrifugal fans of type CND and CNF are, as standard, for operation in corrosion category C5-I (very high) in accordance with the standard DS/EN ISO 12944-2. Coverage Air flow rates from 0.3 to 10 m3/s and pressure rises up to 4000 Pa. Installation Sizes Types CND and CNF are produced in 7...

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CND and CNF - 3

Novenco Centrifugal Fans Motor Sizes - Position Designations 7 Regulation of Air Flow Rate 20

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CND and CNF - 4

Product Description Centrifugal fans of type CND and CNF are light, compact low-pressure and medium fans designed for universal installation in compost plants and greenhouses as well as light industrial plants in aggressive environments. Inlet funnel, mounted in the fan’s front side panel with a boss for duct connection and designed so that the air is conducted with as little loss as possible to the impeller. The fans are intended for continuous operation. The following types of operation can cause fatigue breakage of the impeller and thereby danger of personal injury. Impeller type CND and...

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CND and CNF - 6

Dimensioned Drawings Outlet Flanges G P stk. x øR C F A Connection ducts are made with the same internal dimensions as the fan’s outlet opening (A x B). MxK NxT Mating flanges with the same bolt holes as the outlet flanges are available as accessories. See dimensioned drawing. B CND/CNF Size A [mm] B [mm] C [mm] F [mm] G [mm] K [mm] M [mm] N [mm] T [mm] P [qty.] R [mm] 315 315 220 30 347 252 110 1 2 142.5 10 7 400 400 280 30 432 312 140 1 2 185 10 7 450 450 315 30 482 347 125 2 2 185 12 7 500 500 350 35 536 386 125 2 3 155 14 7 560 560 395 35 596 431 125 2 3 155 14 7 630 630 440 35 666 476...

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CND and CNF - 7

Motor sizes Position designations for impeller Pos. LG Pos. RD Motor sizes CND/CNF size Motor size - 80 - 90 - 100 - 112 315 * * * * 400 * * * * * 450 * * * * * 500 * * * * * 560 * * * * 630 * * * * * * * 710 - 132 - 160 - 180 * NB!:Motor flange B5 (large flange for all motor sizes) The motor’s junction box must also be coordinated with the fan’s motor cover. Max. RPM for CND/CNF Fan types CND and CNF are designed and produced with the same geometry and material, but where the CND is partially welded, the CNF is all-welded and thus designed for higher operating RPMs, as shown in the table....

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CND and CNF - 8

Motors Motor installation The tables show the maximum motor size that can be installed directly on the fan. Motor on the side – vertical motor panel Motor installation sizes for directly coupled motors Motor on the top – horizontal motor panel Belt-driven motor on the top Belt-driven motor on the side Fan type CND/F size Motor installation size CND CNF 315 400 450 500 560 630 710 80-112 80-132 80-132 80-132 100-160 100-160 112-180 Max. motor Max. motor CND CNF Type Weight –315 –400 –450 –500 –560 –630 –710 112 112 112 132 132 132 132 40 40 40 70 70 70 70 CND/F d –315 28h6 30 8 –400 30 8 31...

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CND and CNF - 9

Dimensioning Curves If the fan is used in the shaded area, it is necessary to consider in particular whether the necessary power can be achieved with the max. standard motor size. CND-315 Max. = 4618 RPM Ipt = 0.0951 kg x m2 CNF-315 Max. = 5874 RPM Ipt = 0.0951 kg x m2 δ = 1.20 kg/m3 (at 20° C) 6000 60 70 65 70 74 74 Pt, Pa 65 5000 109 dB 4000 60% Max. speed 618 4 CND 106 dB 3000 0 400 103 dB 0 350 000 2000 100 dB 3 97 dB 0 250 0 200 Pd 0 Pd + P2 0 P1 Basis for chart (Arr. D) 30 20 40 1000 500 1000 500 50 Symbols pt = total pressure pd = dynamic pressure, outlet p1 = connection loss, inlet...

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CND and CNF - 10

Dimensioning Curves If the fan is used in the shaded area, it is necessary to consider in particular whether the necessary power can be achieved with the max. standard motor size. CND-400 Max. = 3426 RPM Ipt = 0.2440 kg x m2 CNF-400 Max. = 4090 RPM Ipt = 0.2440 kg x m2 δ = 1.20 kg/m3 (at 20° C) CNF CND 5000 60 Pt, Pa 75 70 65 77 75 77 70 Max. speed 4090 n= CNF 65 4000 Max. speed 426 3 CND 3000 60% 106 dB 0 300 103 dB 2000 100 dB 0 250 97 dB 0 200 1000 94 dB 91 dB 0 Pd + P2 0 P1 Basis for chart (Arr. D) 10 CND/F 200 40 30 300 400 500 600 500 10 20 m3/s m/s 4 3 20 100 kW Pd 85 7. 7 0 10 6 v 2...

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CND and CNF - 11

Dimensioning Curves CND-450 Max. = 2957 RPM Ipt = 0.4218 kg x m2 CNF-450 Max. = 3365 RPM Ipt = 0.4218 kg x m2 δ = 1.20 kg/m3 (at 20° C) CND CNF 4000 65 Max. speed = 33 n CNF pt, Pa 65 70 60 75 77 77 70 75 65 106 dB Max. speed 957 2 CND 3000 60% 0 260 103 dB 2000 100 dB 0 220 97 dB 0 180 1000 94 dB 91 dB 0 10 140 qv 0 v 0 Pd 0 Pd + P2 0 P1 Basis for chart (Arr. D) 1 2 kW 8 6 5 4 0 3 2 1 0 3 3 5 m /s 4 m/s 10 20 100 200 30 300 10000 10 20 Symbols pt = total pressure pd = dynamic pressure, outlet p1 = connection loss, inlet p2 = connection loss, outlet v = air speed, outlet Continuous product...

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CND and CNF - 12

Dimensioning Curves CND-500 Max. = 2592 RPM Ipt = 0.6430 kg x m2 CNF-500 Max. = 2927 RPM Ipt = 0.6430 kg x m2 δ = 1.20 kg/m3 (at 20° C) CND CNF 4000 pt, Pa Max. speed CNF 7 n 92 =2 60 65 75 70 79 79 75 70 106 dB 3000 2 Max. speed 259 CND 65 103 dB 60% 0 220 2000 100 dB 0 180 97 dB 94 dB 0 150 1000 91 dB 0 9 k 11 120 Pd 0 Pd + P2 0 P1 4 W 0 3 7 v 2 6 0 1 5 qv 4 0 3 2 1 0 5 6 m3/s m/s Basis for chart (Arr. D) 12 CND/F 10 20 100 200 30 300 400 500 Pa 600 500 10 20 Symbols pt = total pressure pd = dynamic pressure, outlet p1 = connection loss, inlet p2 = connection loss, outlet v = air speed,...

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CND and CNF - 13

Dimensioning Curves CND-560 Max. = 2249 RPM Ipt. = 1.0212 kg x m2 CNF-560 Max. = 2464 RPM Ipt. = 1.0212 kg x m2 δ = 1.20 kg/m3 (at 20° C) CNF CND 60 65 70 80 75 81 81 80 75 Max. speed 4 246 CNF n= 3000 pt, Pa Max. speed 9 CND 224 70 65 2000 0 190 60% 106 dB 0 160 1000 103 dB 0 130 100 dB 97 dB 94 dB 0 91 dB W 8 3 9 2 7 6 1 5 qv 4 3 0 2 1 0 k 11 10 100 4 7 m3/s 6 5 m/s 0 0 Pd 0 P1 30 20 10 Pd + P2 0 Basis for chart (Arr. D) v 100 200 300 400 20 Symbols pt = total pressure pd = dynamic pressure, outlet p1 = connection loss, inlet p2 = connection loss, outlet v = air speed, outlet Continuous...

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