Frequently Asked Questions

Are you looking for advice on KNF services, solutions or products? We provide answers to the most asked questions.
Most asked questions

We have established ourselves globally as a solution provider specializing in the development, design, production and distribution of diaphragm pumps, systems for handling gases and liquids as well as swing piston pumps.

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To request a sample pump, visit the KNF Shop and purchase one of our available sample pumps directly. If you are not sure about the best pump solution for your application, please contact your sales engineer to discuss your technical needs.

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Our service department supports you with your inquiry. For more information, please visit our Repairs & Service section. You can also contact our service team directly.


KNF has a lot of experience with many different applications. In order to best guide product recommendation, please provide us with as much information as possible about your system and about how you intend to use the pump. Flow and pressure requirements, motor type and voltage, and pumped media must all be considered when selecting a pump.

The diaphragm is the heart of KNF pumps and plays a key role in the performance. Many different technical applications can benefit from the use of diaphragm technology. Amongst other advantages, it prevents media contamination and ensures excellent leak tightness for media transfer. Learn more about how the technology of our diaphragm pumps works.

Pump Technology

KNF products are manufactured according to the highest quality standards. Our locations are certified according to ISO 9001:2015. Well-defined certification processes throughout the company ensure that we can live up to our customers' quality expectations. If you would like more information on industry-specific certifications or discuss an audit, please contact us.

Our ISO certifications can be accessed in the Downloads section.


Every customer application is different, so we offer a high degree of flexibility and customization. Our customized solutions are collaboratively designed to meet every requirement. We can offer different connections, motors, materials, accessories and much more to exactly fit our pump to your application. Contact our team with your technical requirements and we will help you develop the smartest solution.

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