PSG Dover Accu-Flo, Инженерия, эксплуатация и обслуживание

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WIL-10070-E-03
Wilden
®
6
The Wilden diaphragm pump is an air-operated, positive displacement, self-priming pump. These drawings show the flow
pattern through the pump upon its initial stroke. It is assumed the pump has no fluid in it prior to its initial stroke.
FIGURE 1 When the solenoid is energized, the
air valve directs pressure to the back side of
diaphragm A. The compressed air is applied
directly to the liquid column separated by
elastomeric diaphragms. The diaphragm acts
as a membrane between the compressed air
and the liquid, balancing the load and removing
mechanical stress from the diaphragm. The
compressed air moves the diaphragm away
from the center section of the pump. The
opposite diaphragm is pulled in by the shaft
connected to the pressurized diaphragm.
Diaphragm B is on its suction stroke; air behind
the diaphragm has been forced out to the
atmosphere through the exhaust port. The
movement of diaphragm B toward the center
section of the pump creates a vacuum within
chamber B. Atmospheric pressure forces fluid
into the inlet manifold forcing the inlet valve ball
off of its seat. Liquid is free to move past the
inlet valve ball and fill the liquid chamber (see
shaded area).
FIGURE 2 When the solenoid valve is
deenergized, the air valve redirects pressurized
air to the back side of diaphragm B. The
pressurized air forces diaphragm B away from
the center section while pulling diaphragm A to
the center section. Diaphragm B is now on its
discharge stroke. Diaphragm B forces the inlet
valve ball onto its seat due to the hydraulic
forces developed in the liquid chamber and
manifold of the pump. These same hydraulic
forces lift the discharge valve ball off of its seat,
while the opposite discharge valve ball is forced
onto its seat, forcing fluid to flow through the
pump discharge. The movement of diaphragm
A toward the center section of the pump
creates a vacuum within liquid chamber A.
Atmospheric pressure forces fluid into the inlet
manifold of the pump. The inlet valve ball is
forced off of its seat allowing the fluid being
pumped to fill the liquid chamber.
FIGURE 3 Once the solenoid valve is
reenergized, the air is directed to the back
side of diaphragm A, which starts diaphragm
B on its exhaust stroke. As the pump reaches
its original starting point, each diaphragm has
gone through one intake and one discharge
stroke. This constitutes one complete pump-
ing cycle. The pump may take several cycles
to completely prime depending on the
conditions of the application.
Section 3
HOW IT WORKS
— PUMP