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GENERAL DESCRIPTION
The downdraft table is a workbench with an integrated
extraction fan and filtration system that is used for
welding, grinding and plasma cutting applications.
Depending on the specific application, the use of cer-
tain accessories is required and/or recommended.
See Accessories section of this manual.
The downdraft table features a work grid, a three-
stage prefiltration system for optimum spark arresting
and two oval main filter cartridges. Both pre and main
filters have dust drawers underneath. The working
height of the downdraft table is adjustable.
DOWNFLEX 200-M
The main filter cartridges of the DownFlex 200-M are
disposable. A Magnehelic gauge on the control panel
indicates when the filter cartridges need to be
replaced.
DOWNFLEX 400-MS/A
The filter cleaning system inside the DownFlex 400-
MS/A starts automatically each time the fan is
switched off (offline cleaning) and also when the pres-
sure drop reaches a certain maximum value during
use (online cleaning). The filter cartridges are cleaned
from the inside by compressed air pulses. An integrat-
ed buzzer indicates when the filter cartridges need to
be replaced.
OPERATION
The air containing welding fume, grinding dust or
debris from other processes is extracted and filtered,
after which the filtered air is recirculated back into the
work environment.
The air is extracted through the work grid and the
backdraft panel (See Accessories section of this
manual) by the internal extraction fan. The air passes
through a prefilter for optimum air distribution. This
prefilter is the first spark arresting stage. Next, the air
passes through a labyrinth spark trap before it reach-
es the vertical prefilters in the main filter housing.
Finally, the air passes through the main filter car-
tridges. The air exits the downdraft table through the
outlet on the left side.
OPERATION
SAFETY PRECAUTIONS
When welding, keep your head out of the fume.
Use enough ventilation and/or exhaust at the arc to
keep fumes and gases away from the breathing
zone. When welding with electrodes which require
special ventilation such as stainless or hard facing
(see instructions on container or MSDS) or on lead
or cadmium plated steel and other metals or
coatings which produce highly toxic fumes, keep
exposure as low as possible and within applicable
OSHA PEL and ACGIH TLV limits using local
exhaust or mechanical ventilation. In confined
spaces or in some circumstances, outdoors, a res-
pirator may be required. Additional precautions are
also required when welding on galvanized steel.
The operation of welding fume control equipment
is affected by various factors including proper use
and positioning of the equipment, maintenance of
the equipment and the specific welding procedure
and application involved. Worker exposure level
should be checked upon installation and periodi-
cally thereafter to be certain it is within applicable
OSHA PEL and ACGIH TLV.
------------------------------------------------------------------------
------------------------------------------------------------------------
• Filtering of aggressive fumes (such as
hydrochloric acid) or sharp particles.
• Sucking cigarettes, cigars, oiled tissues, and
other burning particles, objects, and acids.
------------------------------------------------------------------------
DOWNFLEX 200/400
WARNING
FUMES AND GASES can be
dangerous
Welding may produce fumes and
gases hazardous to health. Avoid
breathing these fumes and gases.
WARNING
Never use the downdraft table with-
out prefilters, main filter cartridges
and dust drawers.
WARNING
Fire hazard! Never use the product
for:
• Filtering flammable, glowing or
burning particles or solids or liq-
uids.
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