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Diaphragm pumps

Diaphragm pumps: precise fluid metering for industrial processes

Regular transfer and precise dosing of fluids are essential operations in industrial processes. Foeth has a large stock of second-hand diaphragm pumps for this purpose. These are equipment of well-known brands in the world market, such as KNF Neuberger, among others. Read more about diaphragm pumps

Find the diaphragm pump you need at Foeth!

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KNF Neuberger GmbH PJ29420-N1400.1.2SP.9E Ex - Diaphragm pump

KNF Neuberger GmbH PJ29420-N1400.1.2SP.9E Ex

Diaphragm pump

In stock NL

254S225

KNF Neuberger GmbH PJ29420-N1400.1.2SP.9E Ex - Diaphragm pump

KNF Neuberger GmbH PJ29420-N1400.1.2SP.9E Ex

Diaphragm pump

In stock NL

254S224

TXF - Diaphragm pump

TXF

Diaphragm pump

In stock EU

900WP151

TXF - Diaphragm pump

TXF

Diaphragm pump

In stock EU

900WP149

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The operation and characteristics of diaphragm pumps

Diaphragm pumps are positive displacement pumps in which the reciprocating operation inducing fluid movement is achieved by means of an elastic diaphragm which is repeatedly actuated by mechanical, hydraulic or pneumatic means. The movement of the diaphragm causes a decompression, followed by the fluid entering the pump head, to generate a new compression and final expulsion of the fluid.

One of the most popular variants of this pumping system are pneumatic diaphragm pumps, which, unlike mechanical or hydraulic diaphragm pumps, use compressed air to operate. This type of pump is ideal for pumping liquids with a high solids content, fluids that are toxic, aggressive or highly corrosive in nature. They have the advantage of having no rotating parts or mechanical seals and are very simple to operate.

Advantages of using diaphragm pumps

Diaphragm pumps are widely used in the food industry, water treatment, paper industry, petrochemical and chemical processes. Due to this variety of applications, they have become the most versatile pumps on the market. They are mainly used for the transfer of viscous fluids, with a high content of particles in suspension, as in the case of food extracts, dairy products, yoghurt, cream cheese; emulsions such as mayonnaise; concentrates such as tomato sauce, fats, liquid chocolate, etc.

They are also an excellent choice for pumping caustic fluids, provided that the diaphragm is made of a resistant material such as Teflon. Among the advantages of their use are the following:

  • They are very easy to operate and maintain, as they have a simple and robust design.

  • They can transfer critical material safely.

  • The diaphragm adapts to a wide range of materials, making them chemically and thermally stable under different operating conditions.

  • They are self-priming, so there is no need to prime the pump to start operation.

  • They can operate dry without damage to the system.

If you need additional information about our diaphragm pumps, or are looking for a specific model that you cannot find in our catalogue, please call or write via the Foeth contact form.

Request a quote and buy diaphragm pumps at the best price from Foeth!

Looking for something special?

If we do not have your desired process equipment in stock, please let us know! Our purchase team will try to find the best matching machine for you via their international purchase network.