Biflow SB - Conical
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- 4 standard sizes from 250mm to 500mm.
- Air volume flow rates of up to 3.80 m3/s.
- Static pressures of up to 600 Pa.
- Motors are foot mounted totally enclosed metric, protected to IP55.
- Ideal for external or internal mounting.
The Biflow SB is a quality range of bifurcated axial fans with a conical casing, specially developed for handling more hostile air movement applications. The Biflow SB is designed so that air throughput totally by-passes the motor, keeping the motor out of the airstream in a cooler environment.
FEATURES & BENEFITSLearn more about individual features and benefits of our products. |
SPECIFICATIONThe Biflow SB range of bifurcated fans as manufactured by Elta Fans Ltd. |
TECHNICAL INFORMATIONThe technical information available to you from ELTA Fans is exhaustive - Choose from either sound, performance and electrical or dimensional data for each and every product |
ACCESSORIESElta supply a full range of accessories for each of their products. |
COMPAREChoose up to three products to compare their features side-by-side. |
DOWNLOADSGet the full brochure, wiring diagrams and operation and maintenance instructions. |
Features & Benefits
Higher performance
Adjustable pitch impellers mean the pitch angle of the impeller can be adjusted on site (within limits) if a commissioning problem were to occur.
Mounting arrangement.
With a single entry motor tunnel into the fan casing, the motor tunnel must be either mounted with its opening vertically upwards, or horizontal to ensure adequate motor cooling. All bifurcated axial fans are suitable for external mounting.
Safety
SB units are tested to ISO 5801:1997 (airside performance) and to BS 848 Pt 2:1985 (sound performance) meaning accurate, up to date information on performance and noise data that can be relied upon.
Material strength
SB bifurcated axial fans have a robust, heavy duty construction for added strength and durability. Fan casings are heavy gauge, sheet steel, roll formed and welded and hot dipped galvanised after fabrication to BS 729.
Quality impellers
Adjustable pitch aerofoil section impellers with blades made from high quality pressure die cast aluminium. Hubs are pressure die cast aluminium.
Cost effective
The high efficiency impellers make this a very economical method of moving high volumes of air at low to medium pressures.
Quality assurance
All units are designed and manufactured with procedures as defined in BS EN ISO 9001: 2008.
Specification
The Biflow SB Conical range of Bifurcated axial flow fans as manufactured byElta Fans Ltd. 46 Third Avenue, Pensnett Trading Estate, Kingswinford, West Midlands, DY6 7US, UK. Tel: +44 (0) 1384 275800 - If you need more information - Contact us.
Casing
The all metal fan casing provides a long lasting and robust construction.
The units have been constructed from a single sheet of steel, axial impellers are mounted within the length of the unit casing; the motor is to be located in a single entry tunnel into the casing making the unit suitable for temperatures up to 200 °C
All casing parts are heavy gauge mild steel sheet, roll formed and welded, then hot dipped galvanised to BS 729 after fabrication.
Motors
Motors are to be foot mounted totally enclosed metric type to IP55, with sealed for life bearings, standard industrial paint finish and Class H insulation to EN 60034-5.
Impellers
Adjustable pitch aerofoil impellers are provided with blades made from high quality pressure die cast aluminium (LM6), natural finish.
Impellers are factory set at an angle to provide maximum performance.
The hubs are manufactured from die cast aluminium alloy (LM24). Assembled impellers are to be dynamically balanced to Grade G6.3.
Quality Management
Units are to be designed and manufactured with procedures as defined in BS EN ISO 9001: 2008.
All SB CON units are to be tested to ISO 5801:1997 (airside performance) and BS 848 Part 2: 1985 (sound performance).
Technical Information
Dimensional Data
|
Product Code |
A |
B |
C |
D |
E |
F |
G |
H |
Weight kg | |
|---|---|---|---|---|---|---|---|---|---|---|
|
1Ph |
3Ph |
|||||||||
|
SB250 |
250 |
325 |
460 |
220 |
8 |
10 |
299 |
400 |
23 |
23 |
|
SB315 |
315 |
380 |
500 |
250 |
8 |
10 |
355 |
460 |
30 |
30 |
|
SB315-CON2-3 |
315 |
380 |
500 |
250 |
8 |
10 |
355 |
460 |
- |
31 |
|
SB400 |
400 |
485 |
650 |
305 |
8 |
12 |
450 |
570 |
- |
49 |
|
SB500 |
500 |
585 |
710 |
370 |
12 |
12 |
560 |
700 |
- |
86 |
Performace & Electrical Data
SINGLE Phase - 220-240V / 50Hz
|
Product Code |
Speed r/min |
Airflow |
Airflow m³/s @ Static Pressure Pa. |
Motor Electrical Data |
A.V. Mounts | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
|
0 |
25 |
50 |
75 |
100 |
FLCAmps |
SC Amps |
OutputkW |
||||
|
SB250-CON4-1 |
1450 |
m³/s |
0.28 |
0.22 |
0.15 |
0.03 |
1.13 |
3.73 |
0.12 |
S1G |
|
|
SB315-CON4-1 |
1370 |
m³/s |
0.52 |
0.48 |
0.43 |
0.38 |
0.23 |
1.13 |
3.73 |
0.12 |
S2B |
THREE Phase - 380V-415V / 50Hz
|
Product Code |
Speedr/min |
Airflow |
Airflow m³/s @ Static Pressure Pa. |
Motor Electrical Data |
A.V. Mounts | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
0 |
25 |
50 |
75 |
100 |
150 |
200 |
250 |
300 |
400 |
500 |
600 |
FLCAmps |
SCAmps |
OutputkW |
||||
|
SB250-CON2-3 |
2780 |
m³/s |
0.57 |
0.53 |
0.50 |
0.47 |
0.44 |
0.36 |
0.28 |
0.20 |
0.68 |
3.06 |
0.25 |
S1G |
||||
|
SB250-CON4-3 |
1370 |
m³/s |
0.27 |
0.21 |
0.14 |
0.04 |
0.48 |
2.40 |
0.12 |
S1G |
||||||||
|
SB315-CON2-3 |
2800 |
m³/s |
0.93 |
0.92 |
0.91 |
0.90 |
0.88 |
0.84 |
0.80 |
0.76 |
0.71 |
0.55 |
1.18 |
6.14 |
0.55 |
S2B |
||
|
SB315-CON4-3 |
1370 |
m³/s |
0.52 |
0.48 |
0.43 |
0.37 |
0.25 |
0.48 |
2.40 |
0.12 |
S2B |
|||||||
|
SB400-CON2-3 |
2840 |
m³/s |
2.08 |
2.07 |
2.05 |
2.02 |
2 |
1.96 |
1.92 |
1.86 |
1.82 |
1.70 |
1.53 |
4.42 |
27.4 |
2.2 |
S2G |
|
|
SB500-CON2-3 |
2900 |
m³/s |
3.80 |
3.78 |
3.76 |
3.73 |
3.71 |
3.66 |
3.60 |
3.54 |
3.46 |
3.30 |
3.15 |
2.90 |
7.49 |
57.4 |
4.0 |
S2 |
Sound levels are average spherical free field values at 50% peak pressure for comparative purposes only
Silencer Data
SINGLE Phase - 220-240V / 50Hz
|
Product Code |
dBA Attenuation |
∆P (Pa) 1DEP |
dBA Attenuation |
∆P (Pa) 2DEP | ||
|---|---|---|---|---|---|---|
|
1DENP |
1DEP |
2DENP |
2DEP |
|||
|
SB250-CON4-1 |
-9 |
-11 |
11 |
-14 |
-16 |
16 |
|
SB315-CON4-1 |
-8 |
-11 |
8 |
-13 |
-15 |
12 |
THREE Phase - 380-415V / 50Hz
|
Product Code |
dBA Attenuation |
∆P (Pa) 1DEP |
dBA Attenuation |
∆P (Pa) 2DEP | ||
|---|---|---|---|---|---|---|
|
1DENP |
1DEP |
2DENP |
2DEP |
|||
|
SB250-CON2-3 |
-9 |
-13 |
14 |
-13 |
-15 |
22 |
|
SB250-CON4-3 |
-8 |
-11 |
8 |
-14 |
-16 |
16 |
|
SB315-CON2-3 |
-9 |
-14 |
28 |
-16 |
-15 |
44 |
|
SB315-CON4-3 |
-8 |
-11 |
8 |
-13 |
-15 |
12 |
|
SB400-CON2-3 |
-9 |
-11 |
64 |
-14 |
-15 |
103 |
|
SB500-CON2-3 |
-9 |
-16 |
81 |
-14 |
-19 |
130 |
Sound Data
SINGLE Phase - 220-240V / 50Hz
|
Product Code |
In-duct Sound Power Level dBW @ Octave Band Hz |
dBA @ 3m | |||||||
|---|---|---|---|---|---|---|---|---|---|
|
63Hz |
125Hz |
250Hz |
500Hz |
1 kHz |
2 kHz |
4 kHz |
8 kHz |
||
|
SB250-CON4-1 |
77 |
74 |
71 |
64 |
62 |
60 |
57 |
47 |
48 |
|
SB315-CON4-1 |
80 |
77 |
74 |
68 |
66 |
64 |
62 |
53 |
51 |
THREE Phase - 380-415V / 50Hz
|
Product Code |
In-duct Sound Power Level dBW @ Octave Band Hz |
dBA @ 3m | |||||||
|---|---|---|---|---|---|---|---|---|---|
|
63Hz |
125Hz |
250Hz |
500Hz |
1 kHz |
2 kHz |
4 kHz |
8 kHz |
||
|
SB250-CON2-3 |
83 |
81 |
79 |
78 |
77 |
75 |
73 |
69 |
61 |
|
SB250-CON4-3 |
77 |
74 |
71 |
64 |
62 |
60 |
57 |
47 |
48 |
|
SB315-CON2-3 |
90 |
86 |
82 |
81 |
80 |
77 |
77 |
71 |
64 |
|
SB315-CON4-3 |
80 |
77 |
74 |
68 |
66 |
64 |
62 |
53 |
51 |
|
SB400-CON2-3 |
94 |
87 |
86 |
90 |
84 |
83 |
80 |
73 |
70 |
|
SB500-CON2-3 |
98 |
93 |
90 |
96 |
96 |
95 |
93 |
89 |
80 |
Wiring Data
SINGLE Phase - 220-240V / 50Hz
| Product Code | Wiring Diagram no. |
|---|---|
| SB250-CON4-1 | 152-521 |
| SB315-CON4-1 | 152-521 |
THREE Phase - 380V-415V / 50Hz
| Product Code | Wiring Diagram no. |
|---|---|
| SB250-CON2-3 | 152-600 |
| SB250-CON4-3 | 152-600 |
| SB315-CON2-3 | 152-600 |
| SB315-CON4-3 | 152-600 |
| SB400-CON2-3 | 152-600 |
| SB500-CON2-3 | 152-600 |
Accessories
Bell Mouth inlets (241B)
Fits directly to the fan case flange and provides easy connection to flexible connector
Read more
Impeller Guards (078C)
Bright Zinc plated Steel or glavanised. Fix with clips & screws (included)
Read more
Matching Flanges (061B)
Provides easy connection to flexible connector or ducting
Read more
Mounting Feet (060B)
For free standing mounting of ducted fans
Read more
Silencers (068-D**P)
Pre-galvanised sheet steel with perforated steel lining
Read more
Non-Return Dampers (019)
Prevents reverse flow of air when fan not operating
Read more
Av Mounts (Rubber)
Spring AV mounts - zinc plated steel, rubber insert and foot pad
Read more
Flexible Connectors (Biflow)
Fit to matching flanges to provide flexible connection
Read more
