From sample gas pumps for analyzing process gases to emission monitoring, the transfer of highly explosive media and the recovery of valuable gases, KNF's solutions are used wherever it is crucial for processing media to be handled with special care. 

Applications for KNF Gas and Liquid Pumps:

▪  Mobile/portable gas measurement technology
▪  Stationary emission measurement technology
▪  Handling processing media in industrial processes

Reliable and Safe Where it Matters Most

As a global technology leader in diaphragm pumps and systems for moving liquids and gases, KNF supports customers by drawing on more than 70 years of knowledge and expertise. This is evident through development milestones, such as corrosion-resistant diaphragm pumps for chemical and process engineering, the temperature-resistant and heated pump head for hot gases of up to 240 °C and the double diaphragm pump for transferring hazardous and valuable gases. When it comes to implementing KNF diaphragm pumps that are tailored precisely to your process and operating conditions, your specifications set the benchmark right down to the smallest details.

KNF – Your Partner

For Custom-Fit Solutions that Move You Forward
Flexible support from start to finish – your added value is our priority
KNF modular system exemplified here by the N 816 diaphragm vacuum pump
Maintenance of the N 630 gas pump series
This video shows how to service the N 630 double diaphragm pump.
Maintenance of the N 630 double diaphragm pump series
N 87 Ex diaphragm gas pump – maintenance of the pump
KNF diaphragm pumps for process industries
N 922 diaphragm gas sampling pump – easy-to-service and low operating costs
N 922 diaphragm gas sampling pump – condensate discharge by turning the compressor housing in 90 degree steps
How to align the gas connections of the N 96 diaphragm vacuum pump
How to maintenance the N 96 diaphragm vacuum pump
How to maintenance the N 838 vacuum pump series
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Most Recent Innovations

N 680.1.2 Ex

N 630 Ex

N 630

N 922 Ex

N 922

ATEX Pump Series for Safe Emission Protection and Product Recovery in Processes Handling Explosive Media

_________

  • Flow rate: max. 220 l/min
  • Ultimate vacuum: max. 150 mbar abs.
  • Operating pressure: max. 3.0 bar rel.
  • High chemical resistance
  • Durable even with difficult operating conditions
  • High gas tightness up to 6 x 10-3 mbar x l/s as a standard
  • Flameproof motor with intrinsically safe terminal box for simple installation
Further Product Information
N 680.1.2 Ex

Versatile ATEX Gas Pump Series for Transferring and Compressing Gases and Vapors, and Generating Vacuum Without Contaminating the Media

_________

  • Flow rate: max. 68 l/min
  • Ultimate vacuum: max. 25 mbar abs.
  • Operating pressure: max. 9.0 bar rel.
  • High chemical resistance
  • Durable even with difficult operating conditions
  • High level of gas tightness: approx. 6 x 10-3 mbar x l/s
  • Flameproof motor with intrinsically safe terminal box for simple installation
  • High maximum operating pressure even in explosive environments
  • .12 version with additional safety diaphragm for preventing gas from escaping through cracks in the working diaphragm
Further Product Information
N 630 Ex

Versatile Diaphragm Gas Pump Series for Transferring and Compressing Gases and Vapors, and Generating Vacuum Without Contaminating the Media

________

  • Flow rate: max. 68 l/min
  • Ultimate vacuum: max. 25 mbar abs.
  • Operating pressure: max. 12.0 bar rel.
  • High chemical resistance
  • Durable even with difficult operating conditions
  • High level of gas tightness
  • Ambient temperatures of up to 60 °C possible with water cooling
  • Stable transfer rate at all pressure levels throughout process
  • Quiet operation with minimal vibration
  • .12 version with additional safety diaphragm for preventing gas from escaping through cracks in the working diaphragm
Further Product Information
N 630

Easy-to-service ATEX Pump Series for Stationary Emission Measurements

________

  • Flow rate: max. 23 l/min
  • Ultimate vacuum: max. 110 mbar abs.
  • Operating pressure: max. 2.5 bar rel.
  • Motor approved in accordance with ATEX/IECEx
  • High level of gas tightness: 6 x 10-3 mbar x l/s according to type examination
  • Durable even with difficult operating conditions
  • Compressor housing can be turned in 90° intervals as required
Further Product Information
N 922 Ex

Easy-to-service Pump Series for Stationary Emission Measurements

________

  • Flow rate: max. 25 l/min
  • Ultimate vacuum: max. 110 mbar abs.
  • Operating pressure: max. 6.0 bar rel.
  • High level of gas tightness: 6 x 10-3 mbar x l/s according to type examination
  • Stainless steel series available with IP20 and IP54 protection class
  • Base plate enables simple and quick installation
  • Versatile in pressure and vacuum applications
  • Can be used for media and ambient temperatures of up to +60 °C
  • IP54 series: Dynamically adjustable to the customers’ system by using the 3-phase motor in combination with a frequency converter
Further Product Information
N 922

Our Best Pumps for Gas Analysis, Emission Measurement and Industrial Processes

Here you will get an overview of all our pumps, which can beused for integration with hand-held/portable devices, for integration into stationary emission measurement system and for handling processing media in industrial processes.

Get the Overview here
Our Pumps Start With Your Spec

Our brochure gives a comprehensive overview about our all-round expertise in meeting complex requirements. 

KNF Modular System

How We Collaborate to Optimize Your Pump
Every application is different and some are one of a kind. Our modular system is designed to give you a high degree of flexibility, speed and reliability. You can be sure that every gas and liquid pump supplied by KNF will exactly meet your requirements, no matter how complex or unusual these might be. This includes a broad range of accessories. We work closely with you to design customized project pumps that give you a competitive edge in your target market. From its configuration to its testing conditions and packaging as well as customized warehouse and logistics concepts – your project pump is tailored to your particular needs. 

Series Models – The First Step to Customized Pumps
KNF offers a range of 70 series models designed for handling gases and liquids. The performances of these are described in our data sheets.

The KNF Modular System for Creating Customized Pumps
It is easy to tailor every series model to meet application-specific requirements by selecting and combining a variety of options. These range from the material used to make the pump components that come into contact with the media, to the drive and the mechanical elements such as the circuit points and connections. To meet the requirements even better the KNF modular system has been expanded to include the “DIGITAL CUSTOMIZATION” motor option. “DIGITAL CUSTOMIZATION” sets our brushless DC motors apart, allowing for their unique configuration. These motors exhibit complex operating profiles with comprehensive safety equipment, allowing you to benefit from improved energy efficiency, precise management of target values and easy digital control. The configurations created by the KNF modular system are based on tried and tested individual components, meaning that developing customized pumps is quick and inexpensive. 

Project Pumps – Precisely Designed for the Application
We support your development project by providing you with sample pumps quickly and easily. In consultation with you, our employees from the sales, engineering, and product management divisions determine the modifications to be made to the product's standard technical parameters.

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KNF Pumps are Used Worldwide Where Reliable Safety and Accurate Monitoring is Needed

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KNF Tailored Solutions