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Air Operated Diaphragm Pump

Pumps are machines used in all areas of the industry. The pumps, which are basically used to provide the movement of a liquid, are classified according to the parameters such as the used energy source, the principle of operation, the material from which it is manufactured, etc. In this context, pumps that use compressed air source instead of electrical energy for operation are generally called air operated pumps in the literature. Since liquid is pumped as a result of diaphragm movement in the vast majority of these devices, the name air operated diaphragm pump is also widely used.

How Does The Diaphragm Pump Operate?

There are usually double diaphragms inside these pumps. There are also pumps with three diaphragms in applications that require higher pressure and flow. The working principle of the diaphragm pump is quite simple: compressed air fills in sequence behind the diaphragms thanks to the right-left movement of a diaphragm shaft. The liquid in front of the diaphragm on the side where the air is filled is compressed and directed towards the outlet. Meanwhile, a vacuum is formed in front of the other diaphragm and liquid enters the pump from the liquid source. This movement continues periodically and with the movement of the diaphragms, both suction and pressing are performed. Two check valves are used in both parts to ensure one-way motion of the liquid.

Features of  Air Operated Pump

The most important feature and biggest advantage of these pumps is that they do not need electricity to operate. In the facilities where pressurized air is available and used for different processes, these pumps can be used easily. The air pressure value needed for the air operated pump to operate stably can also be adjusted with an air regulator located at the air inlet of the pump.

Since the design of these pumps is very simple and compact, it is easy to make changes on the pump according to different operating conditions and fluid types. For example, the fact that the medium or liquid to be used has corrosive or flammable properties, and the body of the pump, diaphragms, check valves and sealing equipment also require certain features. In this case, the movable or fixed components used in the air operated pumps can be changed to make the pump suitable for these conditions. For this reason, material alternatives such as aluminum, plastic, cast iron, stainless steel etc. are quite high in air operated pumps.

The capacity range of air operated pump models is also quite wide. In this category, it is possible to find pumps for all kinds of needs from low capacities such as 10 lt / min to high capacities such as 1000 lt / min.

Air Operated Diaphragm Pump Usage Areas

These pumps can be used for a long time in many different applications thanks to their advantageous features. We can list the applications where diaphragm pumps are the most preferred:

• Food applications; all kinds of fluids, pigments and flavors etc.

• Paper industry; adhesives, resins, glues etc.

• Water treatment systems; muddy water discharge, clean water transfer, chemical dosing

• Chemical circulation and transfer in electronic applications

• Chemical industry; all kinds of solvent, acid, alcohol etc.

• Surface treatment technologies

• Paint applications

Since these pumps have the flexibility of using materials, especially in the selection of ATEX certified pumps, air operated pumps becomes the first choice.