Working principles of AODD Pumps. Know the entire process of how Air operated double diaphragm pump works. Contact us to know more about AODD pumps manufactures in India http://antliaworks.com

1. Air-Operated Double-Diaphragm – AODD pumps

2. AODD pumps is a variety of positive displacement pump which
contains of two pumping compartments that are alternately filled
and discharged by the movement of flexible diaphragms.
Compressed air is interchangeably sent to, and vented from, air
compartments on the differing sides of the diaphragms to generate
the propelling action.
AODD pumps are usually used for transmitting applications and can
manage a wide variety of inputs that includes sludge’s, slurries,
rough and shear delicate solutions. Even though they are robust,
dependable and easy to maintain they can be loud, prone to frosting,
and are restricted to low pressure applications.

3. How AODD Pumps Work?
LEFT STROKE
The air valve leads pressurized air to the posterior side of diaphragm A. The compressed
air is applied straight to the fluid column divided by elastomeric diaphragms. The
diaphragm acts as a parting membrane between the compressed air and fluid, balancing
the weight and eliminating mechanical stress from the diaphragm.
The compressed air moves the diaphragm away from the middle block of the pump. The
opposite diaphragm is dragged in by the shaft attached to the pressurized diaphragm.
Diaphragm B is on its suction thump; air behind the diaphragm has been forced out to the
ether through the exhaust port of the pump.
The movement of diaphragm B toward the middle block of the pump creates a vacuum
within compartment B. Atmospheric pressure forces liquid into the inlet multiple times
forcing the inlet valve ball off its position. Fluid is free to transfer past the inlet valve ball
and fill the fluid Compartment.

4. MID STROKE
When the pressurised diaphragm pump, diaphragm A, reaches the limit of its release
stroke, the air valve transmits pressurised air to the posterior side of diaphragm B. The
pressurised air forces diaphragm B away from the middle block while pulling diaphragm
A to the middle block.
Diaphragm B is now on its ejection stroke. Diaphragm B forces the inlet valve ball onto its
position due to the hydraulic forces developed in the fluid chamber and manifold of the
AODD pump. These same hydraulic forces lift the release valve ball off its position, while
the opposite discharge valve ball is forced onto its seat, forcing liquid to flow through the
pump ejection.
The movement of diaphragm A near the middle block of the pump generates a vacuum
within fluid chamber A. Atmospheric pressure forces liquid into the inlet manifold of the
AODD pump. The inlet valve ball is then forced off its position letting the liquid being
pumped to fill the fluid compartment.

5. RIGHT STROKE
At close of the stroke, the air valve again transmits air to the back side of diaphragm A,
which starts diaphragm B on its exhaust stroke. As the AODD pump reaches its original
initial point, each diaphragm has gone through one exhaust and one ejection stroke.
This establishes one complete pumping cycle and the pump may take numerous cycles to
totally prime depending on the conditions of the application.
Antlia Engineering Works is one of the leading manufacturers of AODD pumps in
India, Middle-East, Australia, Africa and produce pumps that robust, reliable, easy to
maintain, and comparatively low cost. They tend to be all-purpose mainstay devices and
are usually used for transmitting applications in a wide range of industries.

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