Characteristics and Best Uses of Diaphragm Pumps

Diaphragm pumps, also called double diaphragm pumps, are used in many different industries. They are efficient and extremely versatile, appropriate for fluids from food grade clean water to acids to slurries and many of the most viscous substances. They are also relatively inexpensive due to their simple design and operation.

How They Work

Uses of Diaphragm Pumps

A double diaphragm pump is a positive displacement pump. It uses two diaphragms in and out to fill the pump chamber with fluid and then push it out. When the diaphragms move away from the chamber, it lowers the pressure of the chamber and fluid rushes in. When they push back into the chamber, they increase the pressure and the fluid flows out.

The fluids flow through one-way check valves, ensuring that fluid only flows in the proper direction through the chamber.

Work Characteristics of Diaphragm Pumps

Diaphragm pumps are known for their suction lift characteristics. The size and rate of the chamber and diaphragms determine whether the pressure and flow rates are high or low. Diaphragm pumps can handle slurries and sludges with ease. They can produce a discharge pressure as high as 1200 bar.

They have very good characteristics when running dry because of their design. Because they are similar to the action of a human heart, they are actually used in the production of artificial hearts. They are self-priming in most situations and can be efficient up to 97%. They can handle the most viscous liquids in the industry as long as they aren’t undersized.

Best Uses for Diaphragm Pumps

Because diaphragm pumps are so versatile, they are used in virtually every industry that requires fluid transfer. They are often used for dewatering or water removal across many different industries. They are used for filling, dispensing and metering due to their efficiency and accuracy.

They can produce plenty of pressure for spraying and cleaning applications and are often used for filter press applications.

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