Diaphragm pumps are a group of positive and unique displacement pumps designed and manufactured either hydraulically or mechanically and capable of controlling the types of pressures and flow rates. These types of pumps are generally pumps that work for the up and down movement of a fluidized surface using an elastic fluid to produce fluid flow.
This rubber or diaphragm surface is internally pumped and generally used to produce this diaphragm of polytetrafluoroethylene (PTFE), Teflon, or any type of synthetic rubber or other similar material. The type of operation of these pumps is that the surface is first pushed to the liquid and increases the pressure to the diaphragm, which will eventually transfer a certain amount of liquid.
When this diaphragm or pump is removed from the liquid, it is placed in a higher amount of liquid. To prevent the flow of fluid from returning, the diaphragm pump uses control valves.
Diaphragm pumps use a piston or hydraulic fluid to control the movement of their diaphragm. Diaphragm pumps designed to carry heavy liquids such as sticky fluids or heavy oils are low-pressure or low-lift pumps, and other diaphragm pumps are commonly used for applications with high-pressure and high-flow applications. For example, for high precision and high pressure industrial applications, Teflon diaphragm pumps are commonly used.
Diaphragm pumps have a lot of key features, but one of the most prominent features is the possibility of long-term run dry of these pumps without damage. The reason for the existence of such a feature in these pumps is that there is a minimum possible friction in the diaphragm pump, while instead of operating the pump, most wear is caused by the transported fluid.
Heavy duty diaphragm pumps are usually made to withstand extremely thick and even corrosive liquids, although this property is also appropriate for residential applications. To make the diaphragm pump chamber, it is also commonly used from various plastics or metal such as aluminum or stainless steel.
Due to the extremely high flexibility and durability of diaphragm pumps, almost all major industries use diaphragm pumps. So today, diaphragm pumps are not only used for distillation or transportation of food, but also we see the use of these pumps in a variety of vehicles and even aircrafts.
It is interesting to know that diaphragm pumps are also widely used in biomedical industries and are one of the main elements in the supply of artificial heart. Diaphragm pumps are used extensively for many other applications, such as the movement of abrasive liquids such as concrete, acid and chemicals due to their very high resistance.
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