KNF Introduces FP 400 Low Pulsation Diaphragm Pump

New product is designed for recirculation applications in a diverse set of markets

The FP 400 is a next-generation diaphragm pump from KNF. It combines the traditional advantages of diaphragm pump technology — self priming, the ability to run dry, and long, maintenance-free lifetime under continuous-operation conditions — with a pulsation level comparable to gear pumps.


Pulsation for new FP 400 is less than 150 mbar. Levels far below this are achievable, depending on system tubing hardness, tubing inside diameter, and flow path length/configuration. The pump delivers up to 5 L/min of liquid at back pressures to 15 psi, with complete linear control of flow between 10% and 100% of the nominal flow rate. Pump flow is fully stable with fluid viscosities ranging between 1 and 150 cSt. The pump handles viscosities up to 500 cSt with some flow rate reduction.

KNF designed the FP 400 specifically to provide gentle, low-shear conveyance of sensitive media. Other strengths of this innovative new pump include very low vibration, a noise level below 55 dBA, chemically resistant flow path material options for use with aggressive media, and an IP65 protection rating.

The many benefits of FP 400 make it particularly well suited for recirculation applications in a diverse set of markets, including:

  • Inkjet Printing: UV, water-based, and solvent ink recirculation to prevent pigment precipitation; ink temperature management; and meniscus control. Glaze, varnish, and hot-melt recirculation. Major global printer and ink manufacturers have already tested the FP 400 intensively for 18 months, raising much interest.
  • Medical Device: Temperature management, including aesthetic laser cooling systems.
  • Semiconductor: Temperature management/cooling, particularly in systems with sensors sensitive to pulsation.
  • Fuel Cells: Fuel recirculation and membrane hydration.


Learn more at


NMP830.1.2 HP from KNF

KNF has introduced new micro gas pump NMP830 HP for OEM customers. This new diaphragm pump offers outstanding high flow, pressure, and suction performance in a compact size. It is ideal for medical therapy, monitoring, and reprographic applications.

Compact NMP830 HP measures just 31mm (1.25”) in width. Yet it produces free flow up to 5.5 L/min with a single head design and to 10 L/min with a dual head. Furthermore, this pump produces best-in-class pressure of up to 3.0 bar g (43.5 psig) and vacuum down to 50 mbar absolute (28.4 inHg).*

The new NMP830 HP is an extension of KNF’s NMP series. This latest addition to the line offers a 33 – 44% increase in flow-to-size ratio compared to existing NMP850 and NMP830 models, respectively. Vacuum and pressure performance are also significantly improved at a comparatively smaller size and lower weight.

Thanks to its compact size, high performance, and quiet operation, the NMP 830 HP pump is particularly well-suited for use in patient monitoring, wound and compression therapy, and respiratory care devices. Additional applications that will benefit from the pump’s features include environmental and security monitors, inkjet printing and color printers/plotters, lab equipment, fuel cell technology, and more.

Available with brushed and 2- or 4-wire brushless DC motors. Standard offerings include EPDM and PPS wetted components. All KNF pumps are engineered for success by optimizing pump solutions to meet customer’s specific requirements.

*NMP830.3 HP model.  Contact us for more information.


For more information, please visit

New Flow-Tight, Diaphragm Liquid Transfer Pump Prevents Uncontrolled Flow

New, FL 10 Diaphragm Liquid Transfer Pump Prevents Uncontrolled Flow

KNF’s newest liquid transfer pump, the FL 10, is leak-tight in both directions, preventing uncontrolled flow and back-flow of liquid media when not in use. The latest addition to KNF’s extensive line of diaphragm liquid transfer pumps, the FL 10 offers many advanced features, and provides a considerable advantages over similar competitive products.

Leak-tight Diaphragm Liquid Transfer Pump

Featuring a solenoid-drive, and leak-tight valve technology, the compact FL 10 liquid transfer pump displaces fluid at a flow rate of 0 – 100 mL/min. Additionally, a signal frequency modulation feature enables quick and easy flow rate adjustments, saving time and money. Finally, like all KNF diaphragm liquid handling pumps, the FL 10 is self-priming, dry-run safe, and maintenance-free – offering outstanding performance longevity and an extraordinarily long service life (10,000 hours or 1.8 billion strokes).

To learn more about the leak-tight FL 10 liquid transfer pump visit

Pumping Above Our Weight Class

NMP 03 Micro Gas Pump
The newly introduced ultra-small, portable device pump — weighing only 11g and measuring just 12.9 mm x 24.2 mm — delivers very consistent, linear transfer up to 500 mL/min.

In addition to ultra-small size and wide flow rate range, the NMP 03 offers a long service life, outstanding efficiency, leak tightness, and quiet, low-vibration operation. Typical portable device applications, for which the NMP 03 micro gas pump is very well suited, include: emissions measurement and gas analyzers; patient monitoring; capnography; negative pressure wound therapy; ion-mobility spectrometry (trace detection); drugs and explosives detection; handheld pipette/dosing; and print-head meniscus control.

The NMP 03 offers a wide operating temperature range of -20 °C – +60 °C (environment and gas) thereby making it well-suited for outdoor use and applications involving hot or cold gases. Plus, like other KNF micro gas pumps, the new NMP 03 features a modular system which can be configured to match your specific requirements.

Visit to learn more.

Liquid Waste Handling in Clinical Diagnostics and Lab Equipment

A new Application Note from KNF Neuberger, Inc. details effective methods for collecting, and evacuating liquid waste.

oem_application_noteWhen determining how to transfer liquid waste within an analyzer, design engineers must examine many factors. Though several methods will work, only one provides optimized system performance and lifetime.



KNF Associates Discuss MedTech Pump Design Trends with MDDI

Pumps for Medical TechnologyThe following excerpt is from the MDDI article, “Pump Designs Flow Toward Smaller Sizes“.

As medical devices require smaller pumps that fulfill rigorous design requirements, the relationship between OEMs and suppliers is shifting.

A medical device that manages the movement of a gas or a fluid relies on a pump to carry out the application. Advances in technology enable pump suppliers to provide pumps capable of addressing increasingly complex medical device requirements. But industry pressures are also changing the nature of the relationship between OEMs and their suppliers.

At one time, medical device companies looked at suppliers simply as a way to outsource work and reduce costs, said Dave Vanderbeck, business development manager for Trenton, NJ-based KNF Neuberger. While suppliers can help OEMs reduce their costs, Vanderbeck increasingly now sees OEMs turning to their pump suppliers for design expertise.

Read the full article at >>

University of Connecticut Displays the Science – and Art – of Nanochemistry

Two of Professor Kumar’s images, left, ‘Enzyme’ Stained Glass, and DNA Floor Boards

Two of Professor Kumar’s images, left, ‘Enzyme’ Stained Glass, and DNA Floor Boards.
Photo Courtesy of Uconn Libraries

If you happen to be in Connecticut over the next few months, check out the “Art in Nanochemistry” exhibit at the Stevens Gallery of Homer Babbidge Library at UConn. The exhibit, which runs through June 15th, showcases a collection of photomicrograph images showing objects at a near-billion magnification.

Thanks to the imagery captured by high power electron and/or optical microscopes, Professor Challa Vijaya Kumar—head of UConn’s Divisions of Physical and Biological Chemistry—and his Ph.D. students, have captured natural materials on a nano-level. The results yielded visually-engaging images that look right at home when displayed as framed art in a gallery setting.

KNF RC 900 Rotary Evaporator on display

KNF RC 900 Rotary Evaporator on display.

Also on display is KNF’s RC 900 rotary evaporator. We like to think the form and function behind the RC 900 displays its own artistry, although, in this case it was selected to be part of this nano-scale themed exhibit to highlight rotary evaporation as an important laboratory tool for small molecule synthesis.

According to the University of Connecticut, the exhibit “is a collection of electron micrographs of nanomaterials from Dr. Kumar’s research group, created with support from the National Science Foundation, works of his colleagues at UConn, and also from the Materials Research Society Art-in-Chemistry annual competitions. Dr. Kumar and his group are investigating how these protein-DNA nanomaterials they create in the lab can be applied in enzyme fuel cells, DNA-solar cells, and neuroprosthesis for spinal cord repair.”

For more information, please visit the Uconn library blog regarding the exhibit or the KNF RC 900 rotary evaporator landing page

MD&M East: OEM Pumps Support Medical Design Advances

By: Eric Wilson, OEM Senior Sales Manager

The first half of the year has flown by, and we’re thrilled our pumps continue to be relied on in truly innovative applications. We’re equally excited by the recent turnout at MD&M East, where current and potential customers, friends, students and industry pros were able to get a first-hand look at our array of OEM pumps and technologies for medical devices.

MD&M shows have always been an excellent opportunity to keep up-to-speed on current medical device trends, and this latest stop on the  tour in Philadelphia was no exception. It was fantastic to see such a noticeable uptick in booth traffic, especially as the crowd was primed to find technologies supporting the continual drive toward miniaturization. Simultaneously, we continued to see a growing trend of stateside  medical device manufacturers outsourcing design and component sourcing. This was not overly surprising to KNF, as we’ve been called on to  design or augment liquid, air and gas transfer solutions for shrinking equipment for quite some time now. However, our team of  engineers was excited to demonstrate some of KNF’s latest and greatest pumps that are extremely capable of high pressure transfer — despite the need for ever-smaller footprints.

Our Pump Projects stress engineer-to-engineer communication, and shows such as MD&M East offer the opportunity to start—or continue— the conversation. As we’ve learned, communication about application needs often leads to more than just an optimized pump. It presents an opportunity to assist engineers better achieve the overall design objectives of the device. The beauty of a trade show is that we have a bevy of  engineers ready and available with an assortment of pumps, components, datasheets, etc. at our fingertips to show-and-tell our way through any discussion.

To learn more about our full line of OEM liquid, air and gas pumps, or to view our upcoming tradeshow schedule, visit And don’t forget to drop by and say hi at the next show.

OEM Liquid Pumps Combine High Pressure Transfer Capabilities with Micro Footprint

Configurable for Application-optimized Design and Performance

NF1_25KNF Neuberger OEM self-priming micro-diaphragm liquid transfer pumps offer design
engineers a unique combination of performance and application flexibility in a remarkably small package – as small as 1.5” in length. Rated to operate continuously against pressures as high as 87 PSIG (some models to 145 PSIG) with 8.86 in. Hg suction capacity, these small but powerful pumps deliver a great ratio of pressure versus footprint. With their high pressure capabilities, KNF micro liquid pumps enable use of smaller instrument tubing, thereby reducing reagent needs. And, even with the compact design, these pumps deliver KNF-level quality and durability, including the ability to be run dry while still ensuring safe operation and maintenance-free, long service life.

Available in a series of performance platforms, KNF micro liquid pumps provide design engineers with a wide range of flow rates. The KNF NF1.5 series delivers up to
60 ml/min, while the NF1.25 delivers up to 300 ml/min and NF1.60 up to 650 ml/min. To ensure long life even under severe application requirements, KNF micro liquid pumps are also configurable in a wide range of chemically-compatible materials for wetted areas: PTFE to polypropylene for head construction and FFPM to EPDM for elastomeric components.

Typical applications for KNF micro liquid pumps include systems for the medical diagnostic, environmental, laboratory, cleaning/disinfection, analytical instrumentation, fuel cell and printing industries.

KNF develops purpose-built, application-optimized fluidic delivery solutions through engineer-to-engineer collaboration early in the design  phase, merging OEM system design goals with KNF pump technology expertise. Utilizing a unique concept of product platform  modularization, KNF is able to compress design and manufacturing timelines, while delivering industry-leading quality and lifecycle  performance.

For more information, please visit

Pump Technology for Today’s Medical Designs

KNF recently had a feature article published in Medical Design Technology’s April issue. The article, titled “Innovation Drives Pump Technology to Meet Today’s Medical Designs” details how today’s medical device demands are being answered by advanced pump technology.

MDT CoverIn today’s medical designs, transferring media – be it oxygen, a patient’s sample or fluid for analysis within the IVD device – is reliant on the pump, sometimes referred to as the “heart” of the application. Some pretty big advances in pump technology are helping design engineers meet the device miniaturization and cost reduction criteria set down on them. These advances are bringing additional value by optimizing performance.

One key trend that has helped meet the smaller-design, less-expensive mandate is the development of brushless DC (BLDC) motors, which allow flow rates to be regulated, helping extend device lifecycle and reliability. The ability to adjust to slower speeds also helps to reduce audible noise, a valuable benefit of today’s medical devices and systems.

Another advantage of BLDC motors in the miniaturization trend is their power requirements. BLDC motors operate at 12V or 24V, much lower than AC motors that operate at 115-230V. This significantly reduces the amount of heat generated, no small factor in compact designs. BLDC motors, with their lower operating voltage, also help create a global chassis that streamlines the system-level regulatory agency approvals, because one design can be used worldwide.


Pumps with BLDC Motors

A perfect example of pump miniaturization can be seen in the KNF NMP series, which features models that are extremely compact yet deliver king-sized performance. These pumps have proven to be extremely useful in designs such as anesthesia monitoring, where they play a crucial role in analyzing the content of patients’ exhaled air, helping ensure the required precision measurement.

Another example of a pump that utilizes BLDC technology is the KNF N838 diaphragm vacuum pump and compressor. Its many advantages have made it the pump of choice in many aspiration systems to evacuate waste and protect samples from becoming contaminated.

Medical design engineers will also find another emerging trend – digital control – advantageous. Utilizing soft-start and other electronic features, pumps with this higher-level system control capability can detect changes in the overall system and respond with automatic adjustments, extending component life, improving reliability and optimizing performance of the entire system.


More Than a Pump

There is more to selecting the proper pump than performance, though. Working with an experienced, knowledgeable pump manufacturer early on in the process is important in choosing the best pump for the application. In fact, an OEM pump manufacturer should be a part of the process from first product touch to last, and even far after. This consultative approach doesn’t just optimize the efficiency of the pump; it provides a total system solution and risk mitigation factor for the design engineer. It also provides efficiency aspects, as engineers can focus on other elements of their design while having confidence that the pump manufacturer can help specify the pump, ultimately leading to a better final product.

Simultaneously, incorporating the pump manufacturer early into the process can also benefit the pump itself. Well-designed BLDC diaphragm pumps correctly integrated into an application can boost product lifecycles, lasting more than one billion strokes. Therefore, as power consumption becomes a priority and control via electronics is maximized, costs can be reduced when compared to traditional methods of AC pump operation.

KNF offers a consultative approach with custom pump projects, as well as a unique modular system.