Manufacturer and distributor of
industrial or commercial blowing fans, industrial or commercial exhaust
fans, high pressure fans, fan blowers, centrifugal blowers, high speed
blowers, positive displacement blowers, twin roots lobe blowers, belt
blowers, direct drive blowers, axial blowers, regenerative blowers,
high pressure fans, Sales of air handling equipment including high air
velocity blowers, high speed blowers, centrifugal radial blowers,
positive displacement blowers, tri lobe blowers, belt driven blowers,
direct drive blowers, axial blowers, regenerative blowers, high
pressure fans, air knives blowers, drying air knives, mechanical vacuum
As the temperature increases
and humidity decreases, system resistance and the pressure developed by
the fan will decrease at the same rate, and a constant flow rate is
maintained. Altitude reduces the air pressure and density along with
the amount of moisture the air can carry. The density and moisture
values in table 1 must be divided by the correction factors in table 4
to determine the actual density and mois-ture content per cubic foot.
In many dryer applications, the static pressure requirement is between
0.5 and 3" 0f water column. For these pressure requirements, a duct
vaneaxial fan often is the best selection. The duct vaneaxial fan
offers a broad performance range and good pressure capability at high
static efficiency. It also offers the benefit of placing the bearings,
shaft and drives on the negative pressure side of the propeller. This
setup draws ambient air across those components during operation and
discharges it into the hot moist air. This fan also can be provided
with a shaft seal to further isolate the components or high temperature
construction for operation up to 500 deg. F (260 deg C).
For higher pressure ranges, a backward curved centrifugal fan often is
selected. This design offers pressures up to 20" water gauge. They also
offer the benefit of having the shaft and bearings outside the fan, and
they can be mounted on the roof with a weather cover.
As with all fan systems, it is important to remember that only
available air can be exhausted. Fans cannot operate in a vacuum. If the
exhausted air cannot be replaced in the facility, fan performance will
drop off and production will suffer. The production facility must have
makeup air for every cubic foot that is exhausted from the facility.
The makeup air can be provided through general ventilation systems or
as part of a heating, ventilating and air conditioning system.
With the exhaust requirements calculated and fan system sized to handle
the required volume at the required pressure, the drying process will
run smoothly. Production results are consistent and the production
facility's environment also is improved by removing contaminated air. A
good understanding of exhaust requirements allows better control of the
A ventilation system should provide for a comfortable environment with
respect to humidity and temperature. The overall goal of climate
control is to provide an environment that is not too cold, hot, dry or
humid, and that is free from drafts and odors. Humidity refers to the
amount of moisture in the air and extremes in humidification levels can
influence how comfortable you may be. When the air is too humid, it
makes people feel uncomfortable (wet, clammy) and can promote mold
growth. On the other hand, low humidity conditions (which typically
occur in the winter months) dry out the nasal and respiratory passages.
Low humidity may be associated with an increased susceptibility to
upper respiratory infections. Static electricity problems (affecting
hair and clothes, particularly synthetic fibers) are good indicators of
an office with low relative humidity.