DirectFlo DF1400
Chapter 1: The DirectFlo 1400
Comco Inc.
1
-
4
Issue Date: January 2009
How the DirectFlo DF1400 Works
(cont’d)
Stepping on the footswitch used to operate the DirectFlo causes two things to happen:
1)
The PowderGate assembly opens, which allows air to flow from the
nozzle. Refer to Figure 1-3, item 1.
2)
An electrical signal is sent to the coil of the modulator assembly which
energizes and de-energizes it 60 times every second. Refer to Figure 1-4,
item 2.
At the beginning of the operating cycle (as shown in Figure 1-3, below), the hose pinch
is opened. Before the modulator has had a chance to energize, regulated air flows
freely through the open modulator valve, the mixing chamber, and out the nozzle.
Figure 1-3: Modulator Open
Since the air flowing from the regulator into the mixing chamber is at basically the same
pressure as that in the tank, the upward force of the air keeps the abrasive in the tank.
At this point, little or no abrasive is being injected into the air stream.
