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Diaphragm Pumps: Pertinent Facts about This Product

Date Added: August 20, 2009 07:46:37 PM
Category: "P": Pumps

Diaphragm pumps are categorized under the most common types of industrial pumps. It makes use of the so-called positive displacement method in order to move a liquid from one location to another. Such devices work through the presence of a chamber, diaphragm, suction and discharge check valves. Pistons are also joined to the diaphragm in order to push hydraulic oil as the diaphragm does its work.

Some of the most common diaphragm pump materials are ethylene propylene, plastic, elastomer, rubber and polytetrafluoroelthylene. These materials are used in order to make the pump resistant to chemicals, weathering and sunlight. Housing the diaphragms are other materials such as aluminum, cast iron, plastic, stainless steel, brass and bronze. Rugged versions of housing withstand higher temperatures. Learn about other facts regarding these industrial products.

Types of diaphragm pumps

Diaphragm pumps are subcategorized into three types. The first type is one that is sealed on both sides with pumped fluid on one end and air or hydraulic fluid on the other. This type of diaphragm is flexible enough to cause increase or decrease in the pump volume chamber. With the help of non-return check valves, the reversed flow of fluid is prevented.

A second type of diaphragm pump is one that works with the help of volumetric positive displacement. In this type, electromechanical measures make the pump work instead of employing air or oil in the process. The mechanical action makes the pump more flexible as the other side of the diaphragm pump is open.

The third type of diaphragm pump is one that has unsealed diaphragms. Either one or more of these diaphragms work even without using any seal. Fluid is pumped on both sides while the diaphragm is flexed. The flexibility causes the volume of production to change.

Different applications and characteristics

Aside from learning about the different types of diaphragm pumps, it is best to look into where the product is commonly applied. They are generally utilized for hygienic, chemical and industrial applications. They can also be utilized as air pumps for small fish tank filters.

Characteristically, these industrial pumps are favored for their suction lifts that require minimal pressure. They are low shear and are only 3% short in terms of overall efficiency. This means that the pump works to as efficient as 97%. Furthermore, a diaphragm pump is capable of handling highly-viscous liquids and other materials such as abrasives, chemicals, concrete, chemicals, effluents and gasoline or diesel fuel.


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