Safe and Reliable: Advantages of Air Operated Diaphragm Pumps

Safe and Reliable: Advantages of Air Operated Diaphragm Pumps

Air operated diaphragm pumps can be maintained easily offering a cost-effective option for many applications. Hermetically sealed and self priming they allow for variable pressure expulsion without needing a complicated operations.

The diaphragm of the elastomer diaphragm is two pumping chambers, creating positive and negative pressure variations that are used to push fluid around – pulled into the discharge area and then pushed back during suction. The cycle repeats continuously.

Fluid Transfer Innovation

Air operated double diaphragm pumps (AODD) provide a versatile pumping device that allows for the transfer of an array of viscosities and liquids. They are inherently safer than other pump types because they are not powered by electricity and can be specified to gia bom mang khi nen work in ATEX zones, hygienic applications and 3A accreditations.

They are connected with a central area which houses an air-tight valve. This valve is able to channel air that is compressed towards the rear of diaphragm 1 creating a press stroke pushing the liquid out of the pump. At the same time diaphragm 2 performs suction stroke. This is accomplished by an atmospheric pressure that forces the liquid into the suction ball valve. The flow is controlled by changing the pump’s speed. The motion of the pump is similar to the inhalation and exhalation concept that humans use to breathe.

Versatile Pumping Solution

The positive displacement nature of AODD pumps makes sure that they can be used to deal with liquids within many industries. As long as there is an air compressor source, the pump can be utilized wherever needed.

AODD pumps do not have seals which means there’s no requirement for elaborate systems to manage flow rates and pressures. Diaphragm elastomers may be determined to be suitable for the particular fluid, with different durometers that can provide different degrees of resistance to chemical as well as environments. The shape and molded design of the diaphragm can also impact flow and pressure levels and also the life span. The material selection will determine the success of your installation. The right choice of material that is suitable for the application can help to cut down on operating costs overall.


Air Operated Diaphragm Pumps (AODD) operate by compressing air, eliminating the risk of electrical currents touching a product. These pumps can be employed in instances where it’s not safe or even impossible to employ electric pumps because AODD’s do not emit sparks, flashes, short circuits, or leakage.

These pumps are ideal to transport liquids that are shear sensitive, and are often the best choice for applications where a product needs to be pumped from beneath the surface. They’re also incredibly compact and could be put smaller to make them more compact.

The construction materials wetted can vary with the choice among the 316L Stainless Steel, Neoprene, Viton or PTFE for diaphragms and balls. In the case of a specific application an appropriate choice of materials is required for optimal chemical compatibility. These pumps are intrinsically safe and can be ATEX accredited for use in dangerous areas.

Pump Applications Across Industries

Pumps operated with air can be utilized to transfer different liquids from highly viscosity chemical through food and even fuel. They can cope with solids of up to 40% in weight. The pump can be adjusted to fit to the pressure and flow requirements to each application.

In the suction cycle, compressed air fills one of the inside chambers. This pushes one diaphragm in the other direction towards the liquid chamber, and raises lower valve balls to pull in fluid. When this has been completed, the air switch is turned off, and the procedure continues, switching between the two diaphragms creating a double acting pumping action.

Typically, these pumps are fitted with stroke counters for integrating into PLC systems to monitor pumps’ performance as well as control maintenance plans. They can also be supplied with internal pulsation dampeners in order to minimize vibrations and water hammer.

Maintenance and Reliability

Unlike most pumps, the air-operated double diaphragm pump (AODD) can remain dry, and they do not need electrical power. This makes them the workhorses of the industrial pump world. But, they need to be maintained properly in order to guarantee their longevity and reliability.

Regular inspections can help prevent common problems such as a damaged diaphragm or valve that can significantly decrease your pump’s lifespan. The material your diaphragm is made from (EPDM rubber or PTFE) can affect the life of your pump and its stiffness.

Checking the position of valves manually on suction as well as discharge while you are maintaining can aid in preventing issues like an unblocking pump. The lack of proper lubrication and improper positioning of the pump could create a range of difficulties.

September 12, 2023 admin