Diaphragm Metering Pump

Diaphragm metering pump is a positive displacement pump designed to be used as a proportional metering pump. It uses a flexible diaphragm instead of a piston to vary the volume of the pump chamber, thereby increasing and decreasing the pressure of the internal fluid.

HAOSH diaphragm dosing pump’s sealed metering unit and corrosion resistant materials make it easy to pump all types of corrosive media.

how does a diaphragm metering pump work?

Diaphragm metering pump works on a similar principle to a piston pump. The diaphragm is driven up and down by means of an electromagnetic or electric motor. The plunger is fixed to the diaphragm, which pumps the fluid into the main stream. At the output, the volume of the dosed product is proportional to the amount of water driven.

Industry applications

Diaphragm dosing pumps are used in a wide range of applications, including water treatment, chemical processing and agricultural applications. Concentrates can be anything from fertilizers, water treatment additives and pharmaceuticals.



They are commonly used in many different industries for the addition or dewatering of chemicals. Because of their efficiency and accuracy, they are used for filling, dispensing and metering. Air-operated diaphragm pumps, for example, can generate sufficient pressure for spraying and cleaning applications, and are often used in filter press applications.

A diaphragm pump, also known as an air-operated diaphragm pump, is a positive displacement pump that uses a combination of thermoplastic, rubber or PTFE diaphragms and a suitable valve to pump the fluid.

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