The Inner Workings of Air Operated Diaphragm Pumps: Fluid Transfer Innovation

Diaphragm pumps that are operated by air are simple to keep in service and provide a low-cost solution to many needs. Self priming and hermetically sealed, they can maintain a variable pressure for expulsion without the need for complicated operations.

The diaphragm of the elastomer diaphragm is two chambers of pumping, resulting in positive and negative pressure variations which can be utilized to push fluid around – pulled into the discharge area and then pushed back by suction. The cycle repeats continuously.

Fluid Transfer Innovation

Double diaphragm air operated pumps (AODD) can be a flexible pumping system that is able to transfer an array of viscosities and liquids. They’re more secure over other types of pumps because they do not require electrical power and are suitable to be used in ATEX zones, hygiene applications as well as 3A certificates.

Two diaphragms connect by a central portion which houses the air valve. The valve is designed to direct compressed air to the back of diaphragm one, and causes it to create an upward pressure, pushing the liquid away from the pump. The diaphragm two is performing a suction stroke. It is achieved by the an atmospheric pressure that forces the liquid into the suction ball valve. The flow is controlled by changing the speed of the pump. The pumping movement is comparable to the exhalation and inhalation idea of breathing in humans.

Versatile Pumping Solution

The nature of positive displacement in AODD pumps means that they are able for handling liquids in many industries. If there’s an air compressor supply, the pump is able to be placed wherever needed.

AODD pumps do not require sealing and therefore there’s no requirement for complicated systems for controlling flow rates or pressures. Diaphragm elastomers are chosen to match the liquid, and there are various durometers to offer different degrees of resistance to chemical and environmental conditions. The design and shape of the diaphragm can also impact the flow rate and pressure and also the life span. The selection of the right materials will determine the success of your installation. Selecting the appropriate material to suit your needs will allow you in reducing overall operational costs.


Air Operated Diaphragm Pumps (AODD) operate by compressing air. This eliminates the danger that electricity could contact a device. They are suitable for situations where it’s unsafe or unsuitable to utilize electrical pumps since they don’t emit sparks, flashing or leaks, or short circuits.

They are perfect to transport liquids that are shear sensitive They are ideal for situations in which a liquid needs to be delivered from beneath the surface. They’re also extremely mobile and are able to be created to fit into a small size.

The construction materials wetted can differ, and there is a selection between the 316L Stainless Steel, Neoprene, Viton or PTFE for diaphragms as well as balls. Based on the purpose the right choice of material could be required to ensure optimal chemical compatibility. They are completely safe and are ATEX approved to be used in areas of high risk.

Pump Applications gia bom mang khi nen Across Industries

Diaphragm pumps operated by air are able to transport various liquids, ranging from highly viscosity chemical through food and even fuel. They can deal with solids as high as 40% in weight. They are able to be adapted to meet the flow rate and pressure needs to each application.

In the suction cycle, compressed air is pumped into one of the inner chambers, which then pushes another diaphragm to the chamber that contains liquid and then lifts the valve’s bottom ball to pull in fluid. After this process is completed, the air is switched off and the cycle continues, switching between the two diaphragms, creating an action of double-acting pumping.

Most pumps come with stroke counters that can be integrated into PLC systems that monitor the performance of the pump and to control maintenance plans. These pumps can also come with internal pulsation dampeners that reduce vibration and water hammer.

Maintenance and Reliability

In contrast to most pumps, the air-operated double diaphragm pump (AODD) can be run completely dry and don’t need electrical power. They are the workhorses of industrial pumps. But, they need to be taken care of properly to guarantee their longevity and dependability.

A regular check-up can prevent typical issues like the diaphragm being damaged or a valve that could drastically reduce the pump’s lifespan. The materials your diaphragms are constructed of (EPDM rubber, or PTFE) can affect the life of your pump as well as its stiffness.

The position of the manually operated valves for suction and discharge in maintenance may aid in preventing issues like blockage of the pump. Lack of lubrication or incorrect mounting of the pump could result in a myriad of issues.