KNF works alongside the world's leading inkjet printer manufacturers.

Our custom-built solutions boast a reliable, durable and maintenance-free design.

Applications for KNF Gas and Liquid Pumps:

▪  Ink supply
▪  Degassing
▪  Print head cleaning
▪  Purging
▪  Vacuum generation on the print heads for the meniscus effect
▪  Ink circulation

Configured to Meet DOD and CIJ Requirements

KNF gas and liquid pumps are used in all areas of industrial inkjet printing, from printing equipment for large-format banners to decorative printing on furniture and ceramics as well as printing systems for barcodes and packaging labels. 

From ink supply and degassing to the cleaning and purging of print heads, vacuum generation on the print heads for the meniscus effect and ink circulation, our customized, comprehensive solutions use gas and liquid pumps to perform all the processes needed to ensure the continuous transfer of ink. KNF's diaphragm pumps are tailored to all the specific requirements of both DOD and CIJ technology. 

KNF – Your Partner

For Custom-Fit Solutions that Move You Forward
Flexible support from start to finish – your added value is our priority
How to cover trends in ink supply systems with new diaphragm pumps – Presentation at drupa preview 2021
FP 70 smooth flow pump – low in pulsation, high in efficiency
KNF smooth flow technology explained by Stephan Engel, Product Manager
KNF smooth flow technology explained by Stephan Engel, Product Manager
Pulsation comparison with the FP 70 smooth flow pump
Tubing vibration comparison with the FP 70 smooth flow pump
FP 400 diaphragm liquid pump – minimal pulsation
Unboxing of the FK 1100 liquid pump
FL 10 diaphragm liquid pump – completely safe transfer of highly liquid, aggressive media
How to maintenance the N 838 vacuum pump series
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Most Recent Innovations

FP 70

N 96

FP 400

FP 150

NPK 012

Low Pulsation and Highly Efficient Smooth Flow Pump for Ink Delivery and Ink Circulation

________

  • Flow rate: max. 0.85 l/min
  • Suction height: 3 mH2O
  • Pressure head: 20 mH2O
  • Integrated damper provides smooth flow with low pulsation
  • Integrated damper reduces flow resistance in tubes
  • Integrated damper prevents bubble formation
  • No need for additional dampening elements
  • Innovative 4-point valves for reliable self-priming even at low motor speeds
  • Digitally customizable BLDC motor for precise flow control and pinpoint adjustments to your electronics
Further Product Informationen
FP 70

Powerful Diaphragm Vacuum Pump and Compressor for Print Head Cleaning and Purging

________

  • Flow rate: max. 8.5 l/min
  • Ultimate vacuum: max. 100 mbar abs.
  • Operating pressure: max. 2.5 bar rel.
  • Copes well with vapor and condensation
  • The pump can start against the entire pressure and vacuum range without discharging
  • Brushless DC motor for custom-fit rotational speed control
  • Extended temperature range for ambient temperatures up to 50 °C and media temperatures up to 70 °C
  • High level of gas tightness: 6 x 10-3 mbar x l/s according to type examination
Further Product Information

Diaphragm Liquid Pump with Minimal Pulsation for Ink Circulation

________

  • Flow rate: max. 4.6 l/min
  • Suction height: 3 mH2O
  • Pressure head: 10 mH2O
  • Low pulsation
  • Excellent linearity
  • Self-priming and can run dry
  • Gentle conveying of sensitive media
  • Long lifetime, no maintenance
  • Able to transfer aggressive media
Further Product Information
FP 400

Maintenance-free Diaphragm Liquid Pump with Minimal Pulsation and Shearing Force for Ink Delivery and Ink Circulation

________

  • Flow rate: max. 1.5 l/min
  • Suction height: max. 2.7 mH2O
  • Pressure head: 20 mH2O
  • Low pulsation
  • Excellent linearity
  • Self-priming and can run dry
  • Gentle conveying of sensitive media
  • Long lifetime, no maintenance
  • Able to transfer aggressive media
  • IP 65
Further Product Information
FP 150

Swing Piston Pump Provides Quiet Running at High Performance for Print Head Cleaning and Purging

________

  • Flow rate: max. 13.5 l/min
  • Ultimate vacuum: max. 140 mbar abs.
  • Operating pressure: 5.0 bar rel.
  • High level of performance in a compact size and light-weight
  • Brushless DC motor for custom-fit rotational speed control
  • The pump can start against the entire pressure and vacuum range without discharging
  • Robust design
  • Excellent price/performance ratio
Further Product Information
NPK 012
KNF gas and liquid pumps for DOD and CIJ printing systems

Read our brochure to find out how we support the world's leading printing equipment manufacturers with solutions for inkjet technology.

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.

Learn more

KNF Pumps are Tailored to All the Specific Requirements of DOD and CIJ Technology

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KNF Tailored Solutions