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1Proprietary and Confidential
How does it work?
Principle of Operation
2Proprietary and Confidential
Typical AODD
Powered by compressed air,
nitrogen or natural gas
Flooded suction or suction lift
Solids and slurries
3Proprietary and Confidential
How the Air works
The main air valve sleeve
and spool distributes
compressed air to an air
chamber exerting uniform
pressure over the inner
surface of the diaphragm.
At the same time, the
compressed air that is on
the opposite diaphragm is
being directed through the
main air valve sleeve and
spool to the exhaust port.
4Proprietary and Confidential
How the Air works
Incoming compressed air is
directed by the pilot valve to the
outer surface of the main air valve
spool.
The Cross Drill port is exposed to
in-coming compressed air which
allows positive pressure to ensure
a full shift of the spool, eliminating
“Centering”.
The main spool opens the ports to
allow the incoming compressed air
to apply force to the inner face of
the diaphragm creating the
discharge stroke.
5Proprietary and Confidential
Exhaust air is directed
by the main air valve
to atmosphere.
Pressure is lowered in
the chamber resulting
in a pressure differential.
How the Air works
6Proprietary and Confidential
How the Air works
7Proprietary and Confidential
As compressed air is
directed to the inner face of
one diaphragm the
diaphragm rod pulls the
opposite diaphragm forcing
the exhaust air out of the
chamber.
The inner plate on the
exhaust side of the pump
engages the actuator
plunger, shifting the pilot
valve.
Piloted air shifts the main air
valve spool.
How the Air works
8Proprietary and Confidential
The result of the air
being piloted across
main air valve and
the diaphragm rod
connecting the two
diaphragms is a shifting
pump.
How the Air works
9Proprietary and Confidential
How the Check Valves Work
The air pressure behind
the diaphragm force the
fluid to push open the
discharge check valve
while forcing the
suction side check ball
to seat.

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Sandipiper-Pump-Opration-Prinicpal

  • 1. 1Proprietary and Confidential How does it work? Principle of Operation
  • 2. 2Proprietary and Confidential Typical AODD Powered by compressed air, nitrogen or natural gas Flooded suction or suction lift Solids and slurries
  • 3. 3Proprietary and Confidential How the Air works The main air valve sleeve and spool distributes compressed air to an air chamber exerting uniform pressure over the inner surface of the diaphragm. At the same time, the compressed air that is on the opposite diaphragm is being directed through the main air valve sleeve and spool to the exhaust port.
  • 4. 4Proprietary and Confidential How the Air works Incoming compressed air is directed by the pilot valve to the outer surface of the main air valve spool. The Cross Drill port is exposed to in-coming compressed air which allows positive pressure to ensure a full shift of the spool, eliminating “Centering”. The main spool opens the ports to allow the incoming compressed air to apply force to the inner face of the diaphragm creating the discharge stroke.
  • 5. 5Proprietary and Confidential Exhaust air is directed by the main air valve to atmosphere. Pressure is lowered in the chamber resulting in a pressure differential. How the Air works
  • 7. 7Proprietary and Confidential As compressed air is directed to the inner face of one diaphragm the diaphragm rod pulls the opposite diaphragm forcing the exhaust air out of the chamber. The inner plate on the exhaust side of the pump engages the actuator plunger, shifting the pilot valve. Piloted air shifts the main air valve spool. How the Air works
  • 8. 8Proprietary and Confidential The result of the air being piloted across main air valve and the diaphragm rod connecting the two diaphragms is a shifting pump. How the Air works
  • 9. 9Proprietary and Confidential How the Check Valves Work The air pressure behind the diaphragm force the fluid to push open the discharge check valve while forcing the suction side check ball to seat.