Fri. Jul 19th, 2024
Beyond Basics: Advanced Applications of Air Operated Diaphragm Pumps

Diaphragm pumps operated with air are easy to maintain and provide a low-cost solution for many applications. They are sealed with a hermetically seal and auto-priming they maintain variable expulsion pressure with no need for complex process.

The diaphragm in the elastomer diaphragm moves between two chambers for pumping creating tensions that are either negative or positive that could be used to transfer fluid. Fluid is sucked in during discharge and pushed into suction. The cycle repeats continuously.

Fluid Transfer Innovation

Double diaphragm air operated pumps (AODD) are an incredibly versatile pumping solution that can transfer a wide range of fluids and viscosities. They are inherently safer as compared to other pumps since they operate without electrical power and are suitable for ATEX zones, hygiene applications and 3A certifications.

The diaphragms have been joined with a central area which houses an air valve. The air valve directs an air stream that has been compressed to the back of diaphragm one, creating an upward pressure, pushing fluid out of the pump. The diaphragm number two performs a suction stroke. It is achieved by the air pressure pushing the liquid into the suction valve. Flow is adjusted by adjusting the speed of the pump. The pumping movement is comparable to the inhalation and exhalation concept of human breathing.

Versatile Pumping Solution

Positive displacement of AODD pumps means that they are able to deal with liquids within the entire spectrum of industries. In the event of an air compressor supply, the pump is able to be used wherever required.

AODD pumps are seal-less they do not necessity for a complex system to control flow rates and pressures. The diaphragm elastomers can be determined to be suitable for the particular fluid. There are various durometers available to provide varying levels of resistance to chemicals and environmental conditions. The form and design of the diaphragm also affects the flow rate and pressure as well as lifespan. The selection of the right materials is crucial for a successful installation. Choosing the right material to suit your needs will allow you to lower overall operating expenses.


Air Operated Diaphragm Pumps (AODD) operate by compressing air, eliminating the risk of electric currents contacting the product. They are suitable for areas where it’s dangerous or not possible to use electricity-powered pumps, as they are not able to emit sparks, flashing or the leakage or short circuits.

They’re ideal for the transportation of liquids with shear sensitivities They are ideal for situations where a product needs to be delivered from beneath the surface. They’re also incredibly lightweight and can be arranged to fit into a small size.

The wetted construction materials can vary, with a choice of 316L Stainless Steel, Neoprene, Viton or PTFE gia bom mang khi nen for diaphragms as well as balls. Based on the purpose the right choice of material might be necessary to achieve optimal chemical compatibility. They are completely safe and could be ATEX accredited to be used in areas of high risk.

Pump Applications Across Industries

Air operated diaphragm pumps are able to transport various liquids, ranging from chemicals with high viscosity to foods and fuel. They can deal with solids of up to 40% by weight and can be adjusted to suit the flow rate and pressure needs in each location.

The suction cycle occurs when compressed air is pumped into one of the inside chambers. This pushes another diaphragm to the chamber that contains liquid and then lifts lower valve balls for a draw of fluid. Once this is complete the air is switched off and the cycle is repeated, switching between two diaphragms, creating an action of double-acting pumping.

The majority of pumps have stroke counters to be connected into PLC systems for monitoring the performance of the pump and to control maintenance schedules. Additionally, they can be fitted with pulsation dampeners inside to reduce vibration and water hammer.

Maintenance and Reliability

Unlike most pumps, these air-operated double diaphragm pump (AODD) are able to operate dry and not need electrical power. This makes them the workhorses in the world of industrial pumps. But they have to be properly cared for to guarantee their longevity and reliability.

Regular inspections can help prevent regular problems, such as damage to the valve or diaphragm that can significantly decrease your pump’s service life. The material your diaphragm is made from (EPDM rubber or PTFE) can affect the life of your pump as well as its stiffness.

The position of the manual valves on suction and discharge in maintenance may assist in the prevention of issues such as blockage of the pump. Lack of lubrication or incorrect mounting of the pump might result in a myriad of issues.

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