KNF at Arablab

Pump innovations for laboratory and research

From November 15–17, 2021, Arablab invites science and chemicals experts to come to Dubai. KNF will be welcoming visitors at booth 507 to present an overview of its latest pump solutions for laboratories, analytical engineering and chemical industries.

KNF’s diaphragm pumps are used as vacuum pumps and systems in laboratories as well as installed in equipment for tasks at key positions in gas analysis, emission measurement and process industries as well as instrumental analysis. Focus is on the LABOPORT®, N 87 Ex, N 922, N 96 and NPK 012 that will be presented at Arablab for the very first time.

Uncomprising, maximum functionality

LABOPORT® laboratory vacuum system series
LABOPORT® SR 820 G | max. 20 l/min | max. 6 mbar abs.
LABOPORT® SR 840 G | max. 34 l/min | max. 6 mbar abs.
LABOPORT® SH 820 G | max. 20 l/min | max. 6 mbar abs.
LABOPORT® SH 840 G | max. 34 l/min | max. 6 mbar abs.
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The new LABOPORT® series offers robust and reliable vacuum pumps and systems. The products’ innovative design is carefully tailored to the users’ requirements and ensures maximum ergonomics.


The new generation of vacuum pumps is modular. Available as a system with a separator and high-performance condenser, the new vacuum pumps allow for creating vacuum systems. This enables environmentally friendly solvent recovery and safe protection against chemicals. The compact LABOPORT® diaphragm vacuum pumps are chemical-resistant as well as oil-free and act as the heart of the new system. Thanks to their integrated manual speed control, the flow rate can be adapted to corresponding applications. The pump is equipped with PTFE TFM pump heads, PTFE-coated diaphragms and FFPM valves.


LABOPORT® vacuum pumps and systems are ideally to be used for filtration, SPE, degassing, fluid aspiration, gel drying, distillation, rotary evaporation, vacuum ovens and vacuum concentrators.

Smaller and easier to install: N 87 Ex diaphragm gas pump

Compact size and simple installation are invariably at the top of customers’ wish lists, the modification of the N 87 Ex diaphragm gas pump has been carried out accordingly.

In order to streamline the start-up process for the pump, the engineers concentrated on simplifying the design of the cable connection to the terminal box. Replacing the Ex d motor with an Ex de motor has eliminated the need for highly specialized connection cables – the terminal box now offers intrinsic safety without them. The motor is ATEX- and IECEx-compliant. The flow rate remains as high as ever at 7.5 l/min and the ultimate vacuum lies at 140 mbar abs.

With a pump head made of PVDF and a PTFE-coated diaphragm, the N 87 Ex is highly chemically resistant, making it suitable for use in process manufacturing and in the chemical industry. The valves are made of FFPM. Thanks to its durable construction and its excellent value for money, the N 87 Ex is also ideally suited for use in emission measurement technology.

The easy-to-service N 922 pump series

For stationary emission measurements
N 922 STE Ex: max. 23 l/min | 2.5 bar rel. | 110 mbar abs.
N 922 STE: max. 25 l/min | 6 bar rel. | 110 mbar abs.
N 922 STE: max. 25 l/min | 6 bar rel. | 110 mbar abs.
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Depending on the area of application, the diaphragm and the valves of the N 922 only need to be replaced about once a year. Few wearing parts, long periods between required maintenance work and low revision costs all add up to advantageously low operating costs.

The gas pump is also now available in two new non-Ex versions and a new Ex version, all with stainless steel pump heads, making it suitable for even more applications. The new models are highly leak-tight in keeping with KNF’s standards, and they feature substantially higher values in all the key areas compared to previous PTFE pump head versions, with a flow rate of up to 25 l/min, up to 110 mbar abs depth of vacuum and up to 6 bar g of pressure. This makes them particularly convenient, for example, as gas sample pumps for stationary emissions measurements or gas compression in the power generation industry.

Using geodetic discharge, the compressor housing in the N 922 can be moved in increments of 90 degrees separately from the motor in order to be appropriately positioned for condensate draining.

The Ex de motor with protection class IP66 is ATEX-compliant and certified by IECEx (incl. CCOE, NEPSI, KOSHA).

The N 96 pump series for complex operating profiles

For gas sampling analysis
N 96 with aluminum/stainless steel pump head: max. 7 l/min | 2.5 bar rel. | 130 mbar abs.
N 96 with PPS pump head: max. 8.5 l/min | 2.5 bar rel. | 100 mbar abs.
N 96 with PPS pump head and AC/DC converter: max. 8.5 l/min | 2.5 bar rel. | 100 mbar abs.
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Small, light and high-performance – key qualities that manufacturers of portable measurement, monitoring and analytical systems require from pump technology. What’s more, the N 96 gas sampling pump also accommodates complex operating profiles. This dynamic profile is made possible by PWM control of the efficient, brushless DC motor.


The pump can start up without discharge in the range of 2.5 bar relative pressure or 100 mbar abs vacuum, respectively. The maximum flow rate is as high as 8.5 l/min. If necessary, the maximum positive pressure can be increased to up to 4 bar g.


When used for gas analysis, the pump produces reliable and precise liquid or gaseous samples for evaluation. The EPDM- or PTFE-coated diaphragm ensures safe use with aggressive and/or corrosive media. Its chemically resistant design and very high tolerance of vapor and condensate means the N 96 can be used with a broad spectrum of media at temperatures of up to 70 degrees Celsius. These pumps can transfer, evacuate and compress media oil free and without contamination.


The N 96 pump series features compact versions with AC/DC converter and PPS, stainless steel or aluminum pump heads. This allows for a broader range of applications, now encompassing the handling of valuable and hazardous gases such as tritium. Demanding media which may require greater gas tightness – such as hydrogen, nitrogen and helium – can also be handled safely.


The wide-range power supply unit mounted to the compressor housing enables the pump to be used across the globe, regardless of the local power grid voltage. The pump head can also be rotated in 90-degree intervals, allowing for the connections to be positioned as needed. Fastening holes located on the side of the pump housing facilitate tubeless connection via o-ring adapters attached to a manifold.

Quiet running at high performance: NPK 012 pump series

When the NPK 012 was introduced in 2019, it proved to be just what the market needed: a powerful pump with special features. Thanks to its high-power density, it quickly drew attention and customers soon requested specifications that would expand the areas of application. KNF now responds with a product update that meets these requirements along with the desire for shorter installation times. Among the most striking changes is the electrical connector. Not only does it speed up the integration of the pump when compared with the previous model using stranded wire, it also protects the motor connection against reverse polarity.

Based on long-term internal testing, the temperature range was expanded to accommodate media at temperatures of up to 60 degrees Celsius / 140 degrees Fahrenheit. The tests showed that using the pump at higher temperatures did not adversely affect the lifespan of the product.

The brushless DC motor allows for excellent control. With maximum power consumption of just 43 W, the NPK 012 builds up 2.5 bar / 36.26 psig of high, continuous positive pressure, and up to 5 bar / 72.52 psig during intermittent operation. The pump achieves an ultimate vacuum of up to 140 mbar abs/ 25.77 inHg, with a flow rate as high as 13.5 l/min. The NPK 012 delivers this high level of performance quietly and with minimal vibration. With a weight of just 600 g/ 1.3 lbs, the NPK 012 is also suitable for mounting in hand-held devices.

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