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ID
FAN |
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DAV
ID fans come in wide range of pressure, airflow, and
power consumption up to 200HP. the ID fans are available
as backward-curved (BC), backward-inclined (BI), radial-tip
(RT), material handling blower, EExd explosion proof
motor, MS or SS construction material and comes in CW,
CCW, up-blast, side blast or 450, front, back or side
dismantling. |
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Hidden
behind this fan selection program is the underlying
fan laws. Fan performance, airflow, static pressure,
power consumption, noise level change in various exponents
and proportions with fan dimensions, speed, and temperature
change. When temperature rises to, for example 200degC,
air is expanded by 56%. At this point, the air has
significantly different physical properties than its
ambience. Air is also expanded at high altitude, and
correction is necessary above 1000ft sea level. In
DAV we have the formulas built in our fan selection
software. The software is vigorously tested in field
application and proven successful. It is with this
selection that we design a fan for metal smelting
plant that extracts fume at 300degC. |
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our
fan impellers has its external edge and center hole
lathed using precision turning machine to ensure to
dimensional offset. The impeller is later dynamically
balanced according to VDI and ISO1940/1-1986 standard.
Each and every blower fan we deliver comes attached
with a balancing certificate.
Our impeller is held to shaft using best-available-method
taper lock hub. This casted hub can be easily removed
from shaft by mere allen key, yet when tighten, squeeze
firmly on shaft. for fans that start and stop often,
this hub mounting becomes inevitable as its screws
that hold to impellers along perimeter of 150mm diameter
and above reduces starting torque acting on impeller
and hub joint, prolonging impeller’s life due
to accelerating torque on impeller.
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Picture
above shows fabrication of 132kw ID fan. in the background
is fan balancing report. |
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fabrication to performance, DAV many years of experience
in fan making is what you can count on. |
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Copyright
© 2005 DAV ENGINEERING SDN BHD |
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