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Audio version — Reading the Air Operated Double Diaphragm Pump Performance CurveAir Operated Double Diaphragm (AODD) pumps are essential for handling corrosive, abrasive, and shear-sensitive fluids. Correct installation is the cornerstone of a long service life and consistent performance. This guide walks through the basic installation steps, air supply setup, and initial operation checks for an AODD pump based on standard site practices.
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An AODD pump operates using compressed air, which alternately moves two diaphragms to create suction and discharge. This design allows the pump to handle corrosive, abrasive, viscous, and shear-sensitive fluids without the use of electricity.
Because air is the driving force, air quality, pressure regulation, and proper connections directly affect pump performance.
Before installing the pump, ensure the following:
The pump should be securely mounted on a stable foundation or base frame using appropriate bolts. Proper mounting minimises vibration and ensures safe operation during continuous duty.
Attach the suction pipe to the pump inlet using leak-proof joints. Applying Teflon tape on threaded connections helps prevent air ingress, which is essential for proper self-priming.
Connect the discharge pipe in the same manner as the suction line. Ensure all joints are properly sealed and aligned to avoid unnecessary stress on the pump casing.
Connect the compressed air line (typically ¼" or ½") to the pump's air inlet valve. This is where regulated air enters the pump to drive diaphragm movement.
An FRL (Filter, Regulator, Lubricator) unit is critical for AODD pump operation. Connect it between the air compressor and the pump using pneumatic tubing.
Set the air pressure gradually using the regulator and monitor it through the pressure gauge. Lubrication oil (SAE 40 grade) is added to the lubricator to ensure smooth internal valve operation.
Once all connections are complete:
Some issues encountered during operation include:
AODD pumps are robust and forgiving, but proper installation and air system setup are essential for reliable performance. Paying attention to mounting, piping, air regulation, and lubrication significantly improves efficiency and extends pump life.
Understanding these basics allows operators and maintenance teams to get the best out of an AODD pump in real plant conditions.
Our engineers at Antlia Engineering Works, Mumbai provide free technical support for AODD pump installation, commissioning, and troubleshooting.
Get Free Technical Support Call +91 9819395995Ensure all accessories are available (pump, air hose, FRL unit, pressure gauge, ball valve, fittings), the foundation is level and rigid, air supply is clean and dry, and piping is compatible with the pumped fluid.
An FRL unit (Filter, Regulator, Lubricator) is critical for AODD pump operation. The Filter removes moisture and debris, the Regulator controls air pressure, and the Lubricator adds SAE 40 oil to keep internal air valves moving smoothly.
Slowly open the air supply using the ball valve, observe pump cycling and discharge flow, check for leaks, and adjust air pressure. If the pump does not start, press the air valve release pin to free any jammed internal components.
Check for air leaks in the suction line, ensure all joints are sealed with Teflon tape, verify the suction line is fully submerged, and check that air pressure is adequate. A poorly sealed suction line is the most common reason for priming failure.