The Air Operated Double Diaphragm Pump (AODD) is a double acting positive displacement diaphragm pump. The pump displaces fluid from one of its two liquid chambers upon each stroke completion. Air Operated double diaphragm pumps are widely used for their simple, portable construction. Air Operated Diaphragm pumps are employed in a host of difficult fluid transfer applications ranging from circulation duty in cleanroom environments to municipal sludge pumping. AOD Pumps are intrinsically safe by design, offering a wide range of material and elastomer options, giving you the optimum solution for your process.

Working Principal of Air Operated Double Diaphragm Pump 

1. The air is ported through the air valve piston into the centre block, where two directional ports direct the air to the left or right side of the pump.
2. The pump has two liquid chambers, two air chambers and two diaphragms. In each pair of chambers, the liquid and air chambers are separated by a flexible diaphragm.
3. When in the air chamber, the air pressure is applied on the back side of one diaphragm forcing the product out of the liquid chamber into the discharge manifold.
4. As the two diaphragms are connected by a rod, or shaft, the other diaphragm is pulled towards the centre of the pump. This causes a suction stroke on the other side.
5. Ball valves open and close alternately to fill chambers, and block back-flow.

At the end of the shaft stroke, the air mechanism (air valve piston) automatically shifts the air pressure to (opposite side) reverse the action of the pump, simply put a 1 : 1 ratio reciprocating pump.

ADVANTAGES OF AODD PUMP

• No seal , No Leakage
• Self Priming,No need of foot valve.
• Variable flow with same pump.
• Can be submerge.
• Less stock of spare to be maintain.
• No skill person is needed to operation and repair pump.
• Light weight, handy in use.
• No rotation no wear & tear hence low maintenance.
• Pump can run dry.
• Stop Automatic on closing of discharge Valve.
• Can handle 2 to 10 mm size solid particles.
• Also Can be used upto accuracy 3 to 5 %.
• No motor, No fire.
• In short very simple and versatile pump.

OPERATION PRINCIPLE

• Dry air is given as input to air valve. Air will push both diaphragm alternatively,
• Four ball valves will act as NRV for suction and delivery.
• As per liquid compatibility MOC of diaphragm ,valve and wetted part selected

APPLICATIONS

• To handle viscous chemicals, slurries
• To transfer explosive liquids ,solvents ,acids .
• Pharmaceutical liquids creams and compounds.
• Semi solid foods, flavours, drinks, alcohols.
• Waste water, sewage effluents, coal and lime slurry.
• Hydrocarbons, petrol diesel, lubrication oil, vegetable oil.
• Paints emulsions, pigments, thinners, resins.
• Ceramics, Slip Gazes, Clays.

The Air Operated Double Diaphragm Pump (AODD) is a double acting positive displacement diaphragm pump. The pump displaces fluid from one of its two liquid chambers upon each stroke completion. Air Operated double diaphragm pumps are widely used for their simple, portable construction. Air Operated Diaphragm pumps are employed in a host of difficult fluid transfer applications ranging from circulation duty in cleanroom environments to municipal sludge pumping. AOD Pumps are intrinsically safe by design, offering a wide range of material and elastomer options, giving you the optimum solution for your process.

Working Principal of Air Operated Double Diaphragm Pump 

1. The air is ported through the air valve piston into the centre block, where two directional ports direct the air to the left or right side of the pump.
2. The pump has two liquid chambers, two air chambers and two diaphragms. In each pair of chambers, the liquid and air chambers are separated by a flexible diaphragm.
3. When in the air chamber, the air pressure is applied on the back side of one diaphragm forcing the product out of the liquid chamber into the discharge manifold.
4. As the two diaphragms are connected by a rod, or shaft, the other diaphragm is pulled towards the centre of the pump. This causes a suction stroke on the other side.
5. Ball valves open and close alternately to fill chambers, and block back-flow.

At the end of the shaft stroke, the air mechanism (air valve piston) automatically shifts the air pressure to (opposite side) reverse the action of the pump, simply put a 1 : 1 ratio reciprocating pump.

ADVANTAGES OF AODD PUMP

• No seal , No Leakage
• Self Priming,No need of foot valve.
• Variable flow with same pump.
• Can be submerge.
• Less stock of spare to be maintain.
• No skill person is needed to operation and repair pump.
• Light weight, handy in use.
• No rotation no wear & tear hence low maintenance.
• Pump can run dry.
• Stop Automatic on closing of discharge Valve.
• Can handle 2 to 10 mm size solid particles.
• Also Can be used upto accuracy 3 to 5 %.
• No motor, No fire.
• In short very simple and versatile pump.

OPERATION PRINCIPLE

• Dry air is given as input to air valve. Air will push both diaphragm alternatively,
• Four ball valves will act as NRV for suction and delivery.
• As per liquid compatibility MOC of diaphragm ,valve and wetted part selected

APPLICATIONS

• To handle viscous chemicals, slurries
• To transfer explosive liquids ,solvents ,acids .
• Pharmaceutical liquids creams and compounds.
• Semi solid foods, flavours, drinks, alcohols.
• Waste water, sewage effluents, coal and lime slurry.
• Hydrocarbons, petrol diesel, lubrication oil, vegetable oil.
• Paints emulsions, pigments, thinners, resins.
• Ceramics, Slip Gazes, Clays.