8
BNA PLENUM FAN with Backward Wheels
BNA PLENUM FAN with Backward Wheels
BNA Series
PLENUM FAN with Backward Wheels
BNA Series
BNA Series Plenum Fans – Backward wheels
Kruger Plenum Fans are designed for air handling applications where the fan operates unhoused within a pressurized plenum. This results in a saving of space normally occupied by the fan housing, transitions and diffusers. The fan wheel pressurizes the entire surrounding air plenum in which the fan is installed. This allows air ducts from any direction to be directly connected to the air handling unit enclosure. The compact size of the plenum fan makes it an excellent selection for retrofit and replacement application and for variable air volume systems.
Type / Operating Limit
Type D This type is supplied with motor support minimal maintenance with no belts or pulley. It is a compact, space saving design with motor directly connected to wheel. This construction is mainly for cleanroom, with or without VFD, since there is an absence of belt residue which may contaminate the airstreams.
Fan Size : 315 to 1400 Volume : 1000 to 10000 m3/h Total Pressure : up to 4000 Pa
Type T Compact design of reduced shaft length with a bearing located in the inlet. It requires separate base for motor mounting.
Fan Size : 315 to 1400 Volume : 1000 to 10000 m3/h
Total Pressure : up to 4000 Pa Drawing and dimension of type T available upon request.
Type U No bearings in the fan inlet to effect performance, requires separate base for motor
mounting.
Fan Size : 315 to 1400 Volume : 1000 to 10000 m3/h
Total Pressure : up to 4000 Pa Drawing and dimension of type U available upon request.
TECHNICAL SPECIFICATION
Wheel
The wheel of BNA series has backward curved blades manufactured in cold rolled sheet steel with polyester powder coating finish. Shaft
Shafts are manufactured from C45 carbon steel using an automatic process for positioning and cutting of the keyways. All dimensional tolerances of the shaft are fully checked to ensure a precision fit and then coated with an anti-corrosion varnish after assembly.
Each fan type has its maximum operating speed and power due to its mechanical design. The operating limit of BNA series - fan type is design to meet the requirement of class I, II and III limit as defined in AMCA standard 99-2408-69. The BNA series is available in Direct Driven and Belt Driven, Type D, T or U as small letter Shown:
2
BNA Series
Bearings
Bearings used are either deep groove ball bearing type with an adapter sleeve, or spherical roller bearings type sealed at both sides for different duty application. The bearings are lubricated for life and maintenance-free. If re-lubrication is necessary, it is recommended to use lithium base grease suitable for all temperatures within the operational limits.
Balancing Quality
All wheels are statically and dynamically balanced to ISO1940 and AMCA 204 – G2.5 standards.
All fans after assembly are trim-balanced to ISO1940 and AMCA 204 - G2.5 standard.
Clean room application fans with balancing grade of G1.0 are available upon request.
ACCESSORIES Inlet Guards
Inlet guards may be a requirement stated in some industrial safety regulations. These are available on request.
Motor Selection
The power curve shown on each performance curve represents the absorbed power at the shaft of the fan measured in kW.
To determine the power of the motor to be installed, a correction factors should be applied to compensate for transmission losses.
For conversion to horsepower (HP), use multiplying factor 1.34.
6
Motor power output (kW)
Cor
rect
ion
Fact
or, %
mot
or p
ower
out
put
8
0.45
1.5
1
0.2
0.3
2
3
4
6
0.6
0.75 1.
5
2.2 3
4.5
40
10
15
20
30
60
80100
7.5 15
22.5 30 45 7560 150
225
300
450
2 Pole
4 & 6 Pole
BNA Series
D = Impeller Diameter
Performance
The performance data shown on each diagram has been tested and measured in accordance to AMCA Standard 210 – Fig 12 – installation type B (free inlet and ducted outlet condition).
The performance is achieved under test conditions of radial discharge, smooth air flows with the aid of proper transitions from plenum outlet to duct, and in a plenum which meets the recommended minimum distance for plenum fans installation. An outlet duct of appropriate size, which gives a reasonable outlet velocity to overcome losses, has also been employed. Rating is referred to the standard air density with the total pressure as a function of the air volume, using logarithmic scales.
It is essential that, the same installation type and test standards are used at all times, when comparing fan performances.
Noise
The noise level shown on each diagram refer to the sound power "A-weighted" and the data on the inlet side has been measured in accordance with AMCA Standard 300. The noise levels of the fans are determined as follows:
Sound power level - ("A" scale): Lw (A) as catalogue
Octave band spectrum: Lw = Lw(A) + Lw rel. dB [refer to Kruger for more details]
Sound pressure level:
a) free field Lp(A) = Lw(A) - (20log10d) -11
b) room conditions Lp(A) = Lw(A) - (20log10d) -7
where d = distance of fan (m) SELECTION GUIDELINES To assure optimum performance and be able to use plenum effect pressure loss indicated in the next section, the following guidelines should be adhered to in the plenum fan selection. Minimum Distance
Recommended minimum distances for correct plenum fan installation.
BNA Series
Discharge Direction Plenum Effect Loss Fan performance is developed from test conditions of radial discharge. The pressure loss associated with the duct take off, from the plenum, at a different location must be added to the static pressure required of the fan. The correction factor, K*, for pressure loss for axial discharge can be obtained below.
Worked Example:
Required duty Air volume Q, 8m3/s and static pressure Ps, 1500Pa with Discharge duct A=1m²,
For Axial Duct Discharge:- Outlet Velocity, V = Q/A = 8/1 = 8 m/s
From chart, at outlet velocity, 8m/s, pressure loss coefficient, K* = 1.4.
Pressure loss = K* x Dynamic Pressure, Pd = K* x (V/1.3)² = 1.4 x (8/1.3)² = 53 Pa Actual Required static pressure Ps
’ = 1500+53 = 1553 Pa
Required Plenum fan selection is to be done with the below duty:
Q = 8 m3/s and Static Pressure Ps
’= 1553 Pa
0
2
4
6
8
10
0 2 4 6 8 10 12 14 16 18 20
Fan Outlet Velocity (m/s)
Pres
sure
Los
s C
oeffi
cien
t, K
*
Axial Duct DischargePLA = K* x Pd
Plenum
Radial Duct Discharge
• SINGAPORE • SINGAPORE KRUGER VENTILATION INDUSTRIES PTE LTD KRUGER ENGINEERING PTE LTD
No. 17, Tuas Avenue 10 No. 17, Tuas Avenue 10 Singapore 639141 Singapore 639141 Tel. +65 68611577 - Fax +65 68613577 Tel. +65 68631191 - Fax +65 68631151 Email: [email protected] Email: [email protected]
• MALAYSIA • THAILAND KRUVENT INDUSTRIES (M) SDN BHD KRUGER VENTILATION IND. (THAILAND) CO. LTD
Lot 8, Jalan Perusahaan 2 Batu Caves 1/19 Moo 2 Rama II Rd, Tasai Industrial Area, 68100 Batu Caves Selangor Mueng Samuthsakorn 74000, Thailand
Tel. +603 61888293 - Fax +603 61898843 Tel. +66 34-490164-9/375-6 - Fax +66 34-490170/377 Email: [email protected] Email: [email protected]
• BEIJING • GUANGZHOU
BEIJING KRUGER VENTILATION CO. LTD GUANGZHOU KRUGER M&E INDUSTRIES LTD No. 1A South Industry Area No. 1270 Maogang Road, Huangpu Beijing Economical And Technological Guangzhou, P.R. China 510700 Development Area, Beijing China 100176 Tel. +86 20-32387634 Fax +86 20-32387624 Tel. +86 10-67881366 - Fax +86 10-67880566 Email: [email protected] Email: [email protected]
• HONG KONG • SHANGHAI
KRUGER VENTILATION (HONG KONG) LIMITED SHANGHAI KRUGER INDUSTRIES CO. LTD Flat C, 9/F, Yeung Yiu Chung (No.8) Industrial Building, No. 500 Yuanguo Road, Anting, Jiading, 20 Wang Hoi Road, Kowloon Bay, Kowloon, Hong Kong Shanghai 201814 P.R. China Tel. +852 22469182 – Fax +852 22469187 Tel. +86 21-69573266 - Fax +86 21-69573296 Email: [email protected] Email: [email protected]
• WUHAN • TAIPEI
WUHAN KRUGER INDUSTRIES CO. LTD KRUGER VENTILATION (TAIWAN) CO. LTD No. 12 Heping Tieji Industries Parden Hongshan No. 157, Ping-an Rd, Hengfeng Village, Economic Zone, Wuhan P.R.China 430063 Dayuan Shiang Taoyuan County 337, Taiwan(ROC) Tel. +86 27- 86718165 - Fax +86 27- 86825719 Tel. +886 3-3859119 - Fax +886 3-3859118 Email: [email protected] Email: [email protected]
• PHILIPPINES • AUSTRALIA KRUGER M&E INDUSTRIES CORPORATION KRUGER VENTILATION (AUSTRALIA) PTY LTD FAPI Compound, E. Rodriguez Ave. 4 Blackfriar Place, Wetherill Park Tunasan, Muntinlupa City, Philippines 1773 NSW 2164, Australia Tel. +63 2-8622891-97 - Fax +63 2-8621287 Tel. +61 2-97562008 - Fax +61 2-97560808 Email: [email protected] Email: [email protected]
• INDONESIA • INDIA
P.T. KRUGER VENTILATION INDONESIA KRUGER VENTILATION INDUSTRIES (INDIA) PVT LTD JL. Teuku Umar No.20, Kruger Centre, Mumbai-Nashik Highway, Karawaci - Tangerang 15115, Indonesia Atgaon, Shahapur, Thane 421304, India Tel. +62 21-5513576 - Fax +62 21-5513502 Tel. +91 2527 240170/008/275 - Fax +91 2527 240075 Email: [email protected] Email: [email protected] ● Chennai: +91 9789982290 ● Delhi: +91 9958991650
● Bangalore: +91 9902098460 ● Mumbai: +91 9860198710 ● Kolkatta: +91 9748777215
• KOREA NEOMATE TECHNOLOGY & CONSULTING CO. LTD 2-1010, Ace High Tech City B/D, 54-66 Mullae-dong 3-ga Yeongdeungpo-gu, Seoul, Korea Tel. +82 02-2679-2052/3 - Fax +82 02-2679-2174 Email: [email protected]
K R U G E R G R O U P ( V E N T I L A T I O N )
The company is always improving and developing its products, therefore the company reserves the right to make changes to the illustrated products. Certified dimension will be provided upon request.
Edition 1 Printed on June 08
• VIETNAM KRUGER VENTILATION INDUSTRIES PTE LTD (Vietnam Representative Office) 4th floor, HHM Office Building, 157-159 Xuan Hong St, Tan Binh Dist, Hochiminh City, Vietnam Tel. +84-8-2968123 - Fax +84-8-2968124 Email: [email protected]
CNo. - CAT012.E1 December 2007
Kruger Ventilation Industries Pte Ltd
No. 17 Tuas Avenue 10 Singapore 639141 - Tel. +65 68611577 - Fax +65 68613577
