PSG Dover WILDEN Accu-Flo A2, Инженерия, эксплуатация и обслуживание

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WIL-10060-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 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
pumping cycle. The pump may take several
cycles to completely prime depending on the
conditions of the application.
Section 3
HOW IT WORKS
— PUMP