Prodigy HDLV Generation II Pump, Pump Manifold, and Circuit Board
5
Part 1081195-11
E
2018
Nordson Corporation
Theory of Operation
Pumping
The Prodigy HDLV pump consists of two halves
that function identically. The halves alternately
draw powder in and dispense powder out of the
pump; while one half is drawing powder in, the
other half is dispensing powder out.
Left Half Drawing Powder In
See Figure 3.
The left suction pinch valve is open, while the
left delivery pinch valve is closed. Negative air
pressure is applied to the left porous fluidizing
tube, which draws powder in the inlet fitting, up
the left side of the inlet manifold wear block,
through the left suction pinch valve, and into the
left fluidizing tube.
After the negative air pressure has been on for
the specified time, the fluidizing tube’s negative
air pressure shuts off and the left suction pinch
valve closes.
Right Half Dispensing Powder Out
See Figure 3.
The right suction pinch valve is closed, while the
right delivery pinch valve is open. Positive air
pressure is applied to the right porous fluidizing
tube, which dispenses the powder out of the
fluidizing tube, down the right delivery pinch
valve, down the right side of the outlet manifold
wear block, out the delivery fitting, and out to the
tubing that leads to the powder spray gun.
As the sides complete these processes, they
alternate. In the example explained above, the left
half would now dispense powder out while the right
half would draw powder in.
As each half dispenses powder out, the powder in
the tubing blends together, resulting in a consistent
flow of powder from the spray gun.
Air
Powder
Figure 3
Left Side Drawing In, Right Side Dispensing
Note:
Rear, left view of pump.
Air
Powder
Figure 4
Left Side Dispensing, Right Side Drawing In
