222 / 416
E
CENTRIFUGAL FANS; SWSI & DWDI
CENTRIFUGAL FANS; SWSI & DWDI
E-10
© FANTECH
2016
Refer to the ancillary equipment list on pages
I-1
and
M-1
.
ANCILLARY EQUIPMENT
DESCRIPTION
The Centrifugal Fan range of backward-inclined laminar
or aerofoil-section fans, encompasses both single-width
and double-width units.
They feature high strength fully welded mild steel casings
and each range is available in 20 sizes, extending from 305mm
(12 inch) to 2035mm (80 inch) diameter.
Typical Applications
Designed for a wide range of supply or exhaust applications
such as office buildings, shopping centres, hospitals
and universities. The fans are capable of handling clean air
to installations involving hot, toxic, noxious or explosive gases.
Features
O
Casings are made of high strength fully welded mild steel.
O
Finished in a durable prime coat of grey coloured zinc
phosphate. Other finishes available.
O
Choice of high performance backward-inclined laminar
or aerofoil-section blades available.
O
Impellers are a high strength welded construction.
O
Wide range of performances available. See Special Note.
O
Multi-speed motors can be supplied.
O
Belt or direct-drive arrangements available.
O
Speed-controllable using variable speed drives.
O
Can be ordered to handle hot, toxic, noxious or explosive
gases.
Construction
Fully welded mild steel casings.
Prime coat of grey, zinc phosphate is the standard finish.
Impellers are fully welded and are available as
backward-inclined laminar(L) or aerofoil-section(AL) design.
Motors
Type - squirrel cage induction motors
Electricity supply - single or three-phase to suit a wide range of
voltages and frequencies.
Bearings - ball or roller.
Motors with multi-speed windings or to suit Ex d, Ex e, Ex nA,
Ex tD. or similar special needs can be fitted.
Internal Thermal Protection
Thermistors can be provided.
Testing
Air flow tests to BS848:Part 1 1980
Noise tests to AS1217-1972
Wiring Diagram
See page N-6, diagrams DD 1, 2, 3.
The following information is required before production can
commence:
O
Performance required
O
Air temperature, if other than standard
O
Fan size and type; e.g. SWSI or DWDI
O
Impeller type; e.g backward-inclined laminar (L)
or aerofoil-section (AL)
O
Fan handing
O
Discharge angle
O
Position of the drive motor
O
Degree of vibration isolation required
O
Electricity supply
O
Motor type; e.g. standard motor or a motor to suit Ex d,
Ex e, Ex nA, Ex tD, or other special specification
O
Ancillary equipment. Refer to pages I-1and M-1
O
Finish, if other than standard
O
Any special identification markings
Special note
The quick-selection graphs on page E-11 are designed to
give a close indication of the fan size required to perform
the specified duty. Detailed selections can be determined
using the Fans by Fantech Product Selection Program,
or by referring to our sales engineers.
HOW TO ORDER
SUGGESTED SPECIFICATION
The Centrifugal Fans shall be of the SWSI or DWDI type as supplied
by Fantech Pty Ltd.
The housings shall be of welded mild steel with a grey, zinc
phosphate finish.
Impellers shall suit single-width or double-width arrangements as
required and be backward-inclined laminar or aerofoil-section.
Impellers shall be fully welded.
All fans shall be tested to BS848:Part 1 1980 for air flow and
AS1217-1972 for noise.