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
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:
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.
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 relubrication 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.
100
60
40
30
20
15
10
8
2 Pole
6
4 & 6 Pole
4
3
2
Motor power output (kW)
450
300
225
150
60
75
45
30
22.5
15
6
7.5
4.5
3
2.2
1.5
0.6
0.75
0.45
1
0.3
1.5
0.2
Correction Factor, % motor power output
80
BNA Series
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 "Aweighted" 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.
D = Impeller Diameter
BNA Series
Discharge Direction
Radial Duct Discharge
Plenum
Axial Duct Discharge
PLA = K* x Pd
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 Coefficient, K*
10
8
Pressure loss = K* x Dynamic Pressure, Pd
= K* x (V/1.3)²
= 1.4 x (8/1.3)²
= 53 Pa
6
4
Actual Required static pressure Ps’ = 1500+53 = 1553 Pa
2
0
0
2
4
6
8
10
12
14
Fan Outlet Velocity (m/s)
16
18
20
Required Plenum fan selection is to be done with the below
duty:
Q = 8 m3/s and Static Pressure Ps’= 1553 Pa
KRUGER
GROUP
(VENTILATION)
• SINGAPORE
• SINGAPORE
KRUGER VENTILATION INDUSTRIES PTE LTD
KRUGER ENGINEERING PTE LTD
No. 17, Tuas Avenue 10
Singapore 639141
Tel. +65 68611577 - Fax +65 68613577
Email: mktg@krugerasia.com
No. 17, Tuas Avenue 10
Singapore 639141
Tel. +65 68631191 - Fax +65 68631151
Email: mktg@krugerasia.com
• MALAYSIA
• THAILAND
KRUVENT INDUSTRIES (M) SDN BHD
KRUGER VENTILATION IND. (THAILAND) CO. LTD
Lot 8, Jalan Perusahaan 2 Batu Caves
Industrial Area, 68100 Batu Caves Selangor
Tel. +603 61888293 - Fax +603 61898843
Email: mktg@kruger.com.my
1/19 Moo 2 Rama II Rd, Tasai
Mueng Samuthsakorn 74000, Thailand
Tel. +66 34-490164-9/375-6 - Fax +66 34-490170/377
Email: mktg@kruger.co.th
• BEIJING
• GUANGZHOU
BEIJING KRUGER VENTILATION CO. LTD
GUANGZHOU KRUGER M&E INDUSTRIES LTD
No. 1A South Industry Area
Beijing Economical And Technological
Development Area, Beijing China 100176
Tel. +86 10-67881366 - Fax +86 10-67880566
Email: krugerbj@krugerchina.com
No. 1270 Maogang Road, Huangpu
Guangzhou, P.R. China 510700
Tel. +86 20-32387634 Fax +86 20-32387624
Email: gzkruger@krugerchina.com
• HONG KONG
• SHANGHAI
KRUGER VENTILATION (HONG KONG) LIMITED
SHANGHAI KRUGER INDUSTRIES CO. LTD
Flat C, 9/F, Yeung Yiu Chung (No.8) Industrial Building,
20 Wang Hoi Road, Kowloon Bay, Kowloon, Hong Kong
Tel. +852 22469182 – Fax +852 22469187
Email: cfyau@kruger.com.hk
No. 500 Yuanguo Road, Anting, Jiading,
Shanghai 201814 P.R. China
Tel. +86 21-69573266 - Fax +86 21-69573296
Email: shkruger@krugerchina.com
• WUHAN
• TAIPEI
WUHAN KRUGER INDUSTRIES CO. LTD
KRUGER VENTILATION (TAIWAN) CO. LTD
No. 12 Heping Tieji Industries Parden Hongshan
Economic Zone, Wuhan P.R.China 430063
Tel. +86 27- 86718165 - Fax +86 27- 86825719
Email: whkruger@krugerchina.com
No. 157, Ping-an Rd, Hengfeng Village,
Dayuan Shiang Taoyuan County 337, Taiwan(ROC)
Tel. +886 3-3859119 - Fax +886 3-3859118
Email: kyyang@krugertwn.com.tw
• PHILIPPINES
• AUSTRALIA
KRUGER M&E INDUSTRIES CORPORATION
KRUGER VENTILATION (AUSTRALIA) PTY LTD
FAPI Compound, E. Rodriguez Ave.
Tunasan, Muntinlupa City, Philippines 1773
Tel. +63 2-8622891-97 - Fax +63 2-8621287
Email: mktg@krugerph.com
4 Blackfriar Place, Wetherill Park
NSW 2164, Australia
Tel. +61 2-97562008 - Fax +61 2-97560808
Email: krugerfans@bigpond.com
• INDONESIA
• INDIA
P.T. KRUGER VENTILATION INDONESIA
KRUGER VENTILATION INDUSTRIES (INDIA) PVT LTD
JL. Teuku Umar No.20,
Karawaci - Tangerang 15115, Indonesia
Tel. +62 21-5513576 - Fax +62 21-5513502
Email: kia@krugerindo.co.id
Kruger Centre, Mumbai-Nashik Highway,
Atgaon, Shahapur, Thane 421304, India
Tel. +91 2527 240170/008/275 - Fax +91 2527 240075
Email: sales@krugerindia.com
● Chennai: +91 9789982290
● Delhi: +91 9958991650
● Bangalore: +91 9902098460
● Mumbai: +91 9860198710
● Kolkatta: +91 9748777215
• KOREA
• VIETNAM
NEOMATE TECHNOLOGY & CONSULTING CO. LTD
KRUGER VENTILATION INDUSTRIES PTE LTD
(Vietnam Representative Office)
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: neomatetnc@chol.com
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: mktg@krugervn.com
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
Kruger Ventilation Industries Pte Ltd
No. 17 Tuas Avenue 10 Singapore 639141 - Tel. +65 68611577 - Fax +65 68613577
CNo. - CAT012.E1
December 2007