From Chemicals to Foods: Fluid Handling with Air Operated Diaphragm Pumps

Air operated diaphragm pumps can be maintained easily, providing a cost-effective solution for numerous applications. Hermetically sealed and self priming they can maintain a variable pressure for expulsion without requiring complex operation.

The diaphragm of the elastomer diaphragm is two pumping chambers, creating positive or negative pressure differences that can be used to push fluid around – pulled in during discharge and pushed into suction. This loop is repeated over and over.

Fluid Transfer Innovation

Air operated double diaphragm pumps (AODD) provide a versatile pumping system that is able to transfer a wide range of viscosities and liquids. They’re safer than other pump types because they operate without electrical power and can be specified to be used in ATEX areas, hygienic use and 3A accreditations.

They are connected through a central section that houses an air-tight valve. This valve is able to channel air that is compressed towards the rear of diaphragm one, creating an upward pressure, pushing fluid out of the pump. At the same time diaphragm number two performs suction stroke. This happens by using air pressure pushing the liquid to the suction ball valve. It is then adjusted using the speed of the pump. The pumping movement is comparable to the inhalation and exhalation idea of breathing in humans.

Versatile Pumping Solution

Positive displacement of AODD pumps guarantees that they can be used for handling liquids in the entire spectrum of industries. So long as you have access to a compressed air source, the pump can be used wherever required.

AODD pumps are seal-less, so there is no requirement for complicated systems to manage flow rates and pressures. Diaphragm elastomers may be customized to fit the particular fluid. There are various durometers to offer different degrees of resistance to chemical and environments. The form and design of the diaphragm has an impact on flow and pressure levels as well as lifespan. It will determine the success of your process. Selecting the appropriate material for your project will assist to lower overall operating expenses.


Air Operated Diaphragm Pumps (AODD) run on compressed air. They are able to eliminate the threat of electricity contacting a product. They are suitable for applications where it is unsafe or impossible to use electric pumps as they don’t emit sparks, flashes, short circuits, or leakage.

They are perfect for the transport of shear-sensitive liquids which is the best choice for applications that require a substance to be pumped from below the surface. They’re also extremely lightweight and can be arranged to fit into a small size.

The construction materials wetted can be different, ranging from a choice among materials such as 316L Stainless Steel, Neoprene, Viton and PTFE as diaphragms and balls. In the case of a specific application an appropriate choice of materials is required for optimal chemical compatibility. They are completely safe and are ATEX certified for use in hazardous environments.

Pump Applications Across Industries

Air operated diaphragm pumps can move various liquids, ranging from chemicals with high viscosity the food industry and into the fuel sector. They are able to cope with solids as high as 40% in weight. The pump are able to be adapted to meet flow rates and pressure requirements in each location.

During the suction cycle compressed air fills one of inner chambers which pushes out an opposite diaphragm toward the liquid chamber, and raises the bottom valve ball to draw in fluid. When the suction cycle is finished, air switch is turned off, and the procedure is repeated, switching between two diaphragms creating the double action pumping.

The majority of pumps are equipped with stroke counters to be connected into PLC systems to monitor pump performance and control maintenance schedules. Additionally, they can be fitted with internal pulsation dampeners that reduce vibration and water hammer.

Maintenance and Reliability

Like most pumps, these air-operated double diaphragm pumps may bom mang khi nen (AODD) are able to remain dry, and they do not need electrical power. These pumps are considered to be the powerhouses of the industrial pump world. But, they need to be well-maintained to guarantee their longevity as well as reliability.

Regular inspections can help prevent regular problems, such as the diaphragm being damaged or a valve which could significantly reduce your pump’s longevity. What the material your diaphragm made from (EPDM rubber or PTFE) will impact its longevity and stiffness.

Checking the position of valves manually on suction as well as discharge while you are maintaining can be a way to avoid issues, such as a blocked pump. Insufficient lubrication or improper mounting of the pump might lead to a host of problems.

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