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Double Diaphragm Pumps

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What is a Diaphragm Pump

A diaphragm pump is a positive displacement pump which operates with a flexible diaphragm, and integrated check valves. The diaphragm is moved inward & outward toward the pump body which works in conjunction with the check valves and draws in and expels the fluid out the pump casing.

There are two main styles of diaphragm pumps, namely mechanical driven diaphragm pumps and air operated diaphragm pumps. The difference between these two styles is their method of being driven, ie. with compressed air, or mechanically drive with an electric motor or engine.

These pumps are available in various sizes from ¼” to 3”.

They are also available in a range of materials that suit a range of applications. These materials are Aluminium, Cast Iron, Polypropylene, PVDF, Cast Stainless Steel, Food Grade Stainless Steel.

For applications where there is an Explosive Atmosphere, we have ATEX Certified conductive pumps.

Applications of Diaphragm Pumps

Diaphragm Pumps have a wide variety of applications and uses in many industries including food, dairy, pharmaceutical and cosmetic industries, where Stainless Steel pumps are used for these hygienic requirements.

Air pumps are very  commonly used in the food sector as the transfer of the fluid does not disrupt the chemical properties and consistency of products such as milk, buttermilk, yogurt, cream, mustard, mayonnaise, ketchup and similar products.

Other uses of AODD pumps include transfer of petroleum products, oil and sludge removal operation, transfer of many types of chemicals, including adhesives, solvents, solvent and water based glues and adhesives, paints and inks. The diaphragm pump is the preferred option for these and other types of chemicals and are widely used as they have the ability to operate safely in a flammable environment.

Air Operated Diaphragm Pump

An air operated diaphragm pump (also known as a membrane pump) is a type of positive displacement pump that uses compressed air as a power source. The compressed air is shifted from one chamber to the other by a linked shaft that allows the chambers to move simultaneously.

RAN Aluminium Series Diaphragm Pump
RAN Aluminium Series

The RAN A series of diaphragm pump is an Air Operated Double Diaphragm (AODD) pump manufactured from high-quality Aluminium.

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RAN Atex Certified Diaphragm Pump
RAN ATEX certified conductive pump series

The RAN ATEX Certified series diaphragm pumps are an Air Operated Double Diaphragm (AODD) that is designed for use in an environment with an explosive atmosphere.

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RAN Cast Iron Series Diaphragm Pump
RAN Cast Iron Series

The RAN C series of diaphragm pump is an Air Operated Double Diaphragm (AODD) pump manufactured from high-quality Cast Iron.

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RAN Cast Stainless Steel Diaphragm Pump

The RAN SC series of diaphragm pump is an Air Operated Double Diaphragm (AODD) pump manufactured from high-quality Cast Stainless Steel. They suitable for a variety of applications in many industries such as water transfer, chemicals, paper/pulp, paints, waste water, ceramics, construction, mining, shipping etc.

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RAN High Pressure Diaphragm Pump
RAN High Pressure HF50 CX

RAN High pressure pneumatic pumps offer uniquely efficient operations and are suitable for a variety of uses. The self priming high pressure unit is operated with a single diaphragm pump and has ball & seat check valves.

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RAN Polypropylene Series Diaphragm Pump
RAN Polypropelene series

The RAN P series pneumatic diaphragm pump is a Polypropylene Air Operated Double Diaphragm (AODD) pump designed to handle a wide range of substances.

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RAN PVDF Series Diaphragm Pump
RAN PVDF Series

The RAN PV series of diaphragm pump is an Air Operated Double Diaphragm (AODD) pump manufactured from PVDF material. They can be used to pump hazardous materials, chemicals, slurries and even solids.

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RAN Stainless Steel Food Grade Diaphragm Pump
RAN cast stainless steel series

The RAN S series of diaphragm pumps is an Air Operated Double Diaphragm (AODD) pump manufactured from high-quality Food Grade Stainless Steel. They are FDA approved.

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Electric Diaphragm Pumps

A Diaphragm Pump driven by an electric motor is a more energy efficient and low maintenance solution as compared to air operated diaphragm pumps. They are ideal for applications that require low pulsation and a smooth flow.

Diaphragm pumps are a class of positive displacement pump.

Grundfos DDA Series
Grundfos DDA Series

The DDA series is a high-end dosing pump range for extended flow and pressure ranges with sensor-based FlowControl and measurement functions.

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Grundfos DDE Series
Grundfos DDE Series

DDE is the economical dosing pump range with basic functions including manual operation or control via PLC for OEM applications

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Grundfos DME Series
Grundfos DME Series

The Grundfos DME series of dosing pumps combine a perfect precision with user-friendliness, covering large dosing quantities that range up to 375 l/h @ 10bar and to 940 l/h @ 4bar.

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Grundfos DMH Series
Grundfos DMH Series

The Grundfos DMH range is a Hydraulic Piston Diaphragm Dosing Pumps series with a durable and robust pump for applications requiring reliable dosing and high-pressure capability, such as process engineering.

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Grundfos DMX series
Grundfos DMX Series

The DMX series is a mechanical dosing pump that is versatile offering a wide flow range and a variety of dosing head sizes and materials. Applications include disinfection, coagulation, flocculation and precipitation.

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RAN EM Series Diaphragm Pump
diaphragm pump electric

RAN electromechanical diaphragm pumps cater to the demands of our costumers which consist of varied applications with unique design concept

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KDP Electric Diaphragm Pump
KDP Diaphragm Pump

KDP Electric Diaphragm pump with single or 3 phase electric motors. 1” to 3” ports

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