Air Operated Double Diaphragm Pump

Air Operated Double Diaphragm (AODD) pump is a type of positive displacement pump that uses compressed air as power source. This pump has wide application and are used in facilities of all sizes, and in a variety of different industries. From petrochemical, food and beverage to wastewater treatment, these pumps are popular and versatile. Their unique design is ideal for transferring highly abrasive or viscous products.

Pump Structure

Working Principle

AODD Pump is a reciprocating pump type which uses compressed air as primary driver. On the suction stroke, compressed air fills the left inner chamber, causing the opposing diaphragm to create suction, lifting the lower valve ball to pull in fluid at the inlet. Simultaneously, the left fluid chamber is in the “discharge” cycle.

During the discharge cycle, compressed air fills the right inner chamber, causing the upper valve ball to open and discharge fluid. Simultaneously, the left chamber is in the “suction” cycle. This back-and-forth motion forces liquid out of one chamber and into the discharge piping while the other chamber is being filled with liquid at the same time.

Features

  • Flowrate up to 1000 LPM

  • Working pressure up to 8.6 bar

  • Handle solids and viscous product well

  • Strong suction lift up to 7 m

  • Relatively low NPSHr

  • Versatile installation; negative/positive suction and can be submerged

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Pump Material

ElastomersTemperature Limits
Neoprene

-18 to 93 °C

Buna-N-12 to 82 °C
EPDM-51 to 138 °C
Viton-40 to 177 °C
Polyurethane-12 to 66 °C
Santoprene-40 to 107 °C
Hytrel-29 to 104 °C
PTFE4 to 104 °C

Metallic

Wetted Parts
Aluminium
Ductile Iron
Stainless Steel

Non-Metallic

Wetted Parts
Polypropylene
PVDF
ETFE

½” BSP (15 mm)

Max Flow Rate : 56 LPM

Max Solid Size : 1.6 mm (1/16″)

Suction Lift : Dry : 5.2 m, Wet : 8.7 m

1″ BSP (25 mm)

Max Flow Rate : 133 LPM

Max Solid Size : 3.17 mm (0.125″)

Suction Lift : Dry : 3.05 m, Wet : 4.89 m

1 ½” BSP (40 mm)

Max Flow Rate : 310 LPM

Max Solid Size : 4.8 mm (3/16″)

Suction Lift : Dry : 7.0 m, Wet : 8.6 m

2″ BSP (50 mm)

Max Flow Rate : 700 LPM

Max Solid Size : 6.4 mm (¼”)

Suction Lift : Dry : 6.9 m, Wet : 8.6 m

3″ BSP (80 mm)

Max Flow Rate : 882 LPM

Max Solid Size : 9.5 mm (⅜”)

Suction Lift : Dry : 6.7 m, Wet : 9.5 m

4″ BSP (100 mm)

Max Flow Rate : 1211 LPM

Max Solid Size : 35 mm (1-⅜”)

Suction Lift : Dry : 4.1 m, Wet : 8.6 m

¼” BSP (6.35 mm)

Max Flow Rate : 16.7 LPM

Max Solid Size : 0.7 mm (1/32″)

Suction Lift : Dry : 1.9 m, Wet : 9.3 m

½” BSP (15 mm)

Max Flow Rate : 56 LPM

Max Solid Size : 1.6 mm (1/16″)

Suction Lift : Dry : 5.2 m, Wet : 8.7 m

1″ BSP (25 mm)

Max Flow Rate : 133 LPM

Max Solid Size : 3.17 mm (0.125″)

Suction Lift : Dry : 2.14 m, Wet : 3.98 m

1 ½” BSP (40 mm)

Max Flow Rate : 458 LPM

Max Solid Size : 6.4 mm (3/16″)

Suction Lift : Dry : 5.5 m, Wet : 9.0 m

2″ BSP (50 mm)

Max Flow Rate : 643 LPM

Max Solid Size : 6.4 mm (¼”)

Suction Lift : Dry : 7.4 m, Wet : 8.6 m

3″ BSP (80 mm)

Max Flow Rate : 999 LPM

Max Solid Size : 13 mm (⅜”)

Suction Lift : Dry : 3.63 m, Wet : 8.64 m

Metallic

Wetted Parts
Aluminium
Ductile Iron
Stainless Steel

½” BSP (15 mm)

Max Flow Rate : 56 LPM

Max Solid Size : 1.6 mm (1/16″)

Suction Lift : Dry : 5.2 m, Wet : 8.7 m

1″ BSP (25 mm)

Max Flow Rate : 133 LPM

Max Solid Size : 3.17 mm (0.125″)

Suction Lift : Dry : 3.05 m, Wet : 4.89 m

1 ½” BSP (40 mm)

Max Flow Rate : 310 LPM

Max Solid Size : 4.8 mm (3/16″)

Suction Lift : Dry : 7.0 m, Wet : 8.6 m

2″ BSP (50 mm)

Max Flow Rate : 700 LPM

Max Solid Size : 6.4 mm (¼”)

Suction Lift : Dry : 6.9 m, Wet : 8.6 m

3″ BSP (80 mm)

Max Flow Rate : 882 LPM

Max Solid Size : 9.5 mm (⅜”)

Suction Lift : Dry : 6.7 m, Wet : 9.5 m

4″ BSP (100 mm)

Max Flow Rate : 1211 LPM

Max Solid Size : 35 mm (1-⅜”)

Suction Lift : Dry : 4.1 m, Wet : 8.6 m

Non-Metallic

Wetted Parts
Polypropylene
PVDF
ETFE

¼” BSP (6.35 mm)

Max Flow Rate : 16.7 LPM

Max Solid Size : 0.7 mm (1/32″)

Suction Lift : Dry : 1.9 m, Wet : 9.3 m

½” BSP (15 mm)

Max Flow Rate : 56 LPM

Max Solid Size : 1.6 mm (1/16″)

Suction Lift : Dry : 5.2 m, Wet : 8.7 m

1″ BSP (25 mm)

Max Flow Rate : 133 LPM

Max Solid Size : 3.17 mm (0.125″)

Suction Lift : Dry : 2.14 m, Wet : 3.98 m

1 ½” BSP (40 mm)

Max Flow Rate : 458 LPM

Max Solid Size : 6.4 mm (3/16″)

Suction Lift : Dry : 5.5 m, Wet : 9.0 m

2″ BSP (50 mm)

Max Flow Rate : 643 LPM

Max Solid Size : 6.4 mm (¼”)

Suction Lift : Dry : 7.4 m, Wet : 8.6 m

3″ BSP (80 mm)

Max Flow Rate : 999 LPM

Max Solid Size : 13 mm (⅜”)

Suction Lift : Dry : 3.63 m, Wet : 8.64 m

Gallery

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