DirectFlo DF1400
Chapter 1: The DirectFlo 1400
Comco Inc.
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Issue Date: January 2009
How the DirectFlo Works
As shown in Figure 1-2, below, when the DirectFlo Power Switch on the front panel is
initially turned “ON”, supply air enters through the energized air valve at the back of the
unit. The supply air passes through a regulator that allows the operator to control the
system pressure, as indicated by the gage on the front of the machine.
The regulated air then passes through an open, or de-energized, modulator assembly
and into the mixing chamber and abrasive tank. Air cannot escape through the nozzle
because the PowderGate (or shut-off) assembly is closed. The air pressure inside the
system builds up until it reaches the regulated pressure.
Figure 1-2: DirectFlo, Pressurized
The DirectFlo, as shown in the illustration above, is now pressurized and ready to use.
To operate the DirectFlo from this point would simply require picking up the nozzle,
pointing it at the item to be blasted, and depressing the footswitch to begin blasting.
What happens when the machine is actually in operation is explained on the following
pages.
