Wilden Turbo-Flo T8, Инженерия, эксплуатация и обслуживание

Страница: 6 / 32

WIL-10272-E-01
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 The air valve directs pressurized
air 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
separation
membrane between the
compressed air and liquid, balancing the
load and removing mechanical stress from
the diaphragm. The compressed air moves
the diaphragm away from the center block
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 of the pump. The
movement of diaphragm B toward the
center block of the pump creates a vacuum
within chamber B. Atmospheric pressure
forces fluid into the inlet manifold forcing the
inlet valve ball off its seat. Liquid is free to
move past the inlet valve ball and fill the
liquid chamber (see shaded area).
FIGURE 2 When the pressurized
diaphragm, diaphragm A, reaches the limit of
its discharge stroke, the air valve redirects
pressurized air to the back side of diaphragm
B. The pressurized air forces diaphragm B
away from the center block while pulling
diaphragm A to the center block. 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 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
block 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 its seat
allowing the fluid being pumped to fill the
liquid chamber.
FIGURE 3 At completion of the stroke, the
air valve again redirects air 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 exhaust 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