A new KNF micro diaphragm gas-sampling pump, type NMP015.1.2, uniquely integrates head connections inside the housing for improved pneumatic performance in a compact and leak-tight package. This optimized design produces less pulsation and additionally allows for the housing to be closed and sealed for significant reduction in audible noise.
The pump ideally suits portable, battery-operated equipment used in a wide range of OEM applications, including gas sampling, explosives detection devices, anesthesia systems, and medical analyzers, among others. Among features, the pump’s elastomeric diaphragm promotes high efficiency and delivers oil-free operation without any risk of contaminating the sampled gas. Pumps can be specified either with an ironless core DC motor or with a brushless DC motor offering longer service life. PEEK housings and pump heads contribute high stiffness and temperature and chemical resistance. Depending on model, these pumps can achieve flow rates to 2.1 l/m, vacuum to 650 mbar (11 in. Hg) absolute, and continuous pressure to 0.6 bar g (9 psig).
All are engineered to perform maintenance-free with low power requirements and are supplied ready for installation to operate in any position. Chemically resistant versions are available and pumps can otherwise be customized to meet particular application demands.

The new KNF NMS020 micropump introduces an efficient and reliable solution to transfer, evacuate, or compress air or gases for analytical, medical, and all portable instruments where space is at a premium. This compact vacuum pump measures 17mm (width) x 31mm (height) x 44m (length), weighs 32g, and can deliver high-performance flow rates up to 1.8 LPM, vacuum up to 15 in. Hg, and pressure up to 7.5 psig.
The micropump additionally benefits from a unique diaphragm that promotes high efficiency and flow and helps the pumped medium remain pure and contaminant-free. These micropumps enable safe, oil-free operation without maintenance. Corrosion-resistant wetted parts reinforce their ability to withstand especially harsh conditions. The pumps are powered by cost-effective brush DC motors or brushless DC motors where applications demand extended service life and low EMI/RFI.
All NMS020 micropumps can be tailored to meet particular OEM requirements with a wide range of custom materials, finishes, coatings, and value-added options, including shock and vibration isolation components, restart mechanism against vacuum/pressure, and specialized connections, among others. Pumps are supplied ready for installation and can be mounted in any position.

This new NF25 super-compact liquid pump is the same size as our NF10 model, but features 250% more flow. and a patented valve system that ensures a linear flow-to-motor speed performance for simple dosing applications. An integrated anti-cavitation chamber provides quieter operation and higher flow. It is available with a traditional brush-commutated DC motor, a long-life ironless-core motor or a 4-wire logic controlled, wide variable speed brushless motor, and a variety of wetted materials. Install it in any position, mount it close to your desired pumping function, unlike other larger heavier pumps that require mounting in remote locations and long tubing runs. Self priming, there is no tubing maintenance, it can run dry and has a long lifetime. Perfect for transfer and metering functions in instruments, fuel cells, medical diagnostic analyzers, process samplers, waater treatment, probe washers, and ink-jet printers, and for portable instruments where low current, consumption and reliability are necessary. Contact KNF application engineers for details.

The new NF600 pump uses four diaphragms connected to a single eccentric in a star configuration. Because the pumping cycles are 90° out of phase, characteristics include smooth flow, low vibration, quiet operation and compact size. The pump has a nominal flow rate of 6l/min, a suction height of 8.8 in. Hg, and is capable of transporting media against back pressures of up to 15 psig. DC, brushless DC and AC motors are available. Because no tubing is used, pump failure due to tubing fatigue or rupture is eliminated. Featuring corrosion-resistant PP/PVDF/FFPM/PTFE envelope that can handle acids, caustics and other difficult materials in addition to neutral media. Self-priming, they can run dry indefinitely or used for low-outgas sample transfer. Applications include medical diagnostic analyzers, process samplers, waater treatment, probe washers, fuel cells, and ink-jet printers, and for portable instruments where low current, consumption and reliability are necessary. Contact KNF application engineers for details.

The FMM20 is a solenoid-driven diaphragm pump designed to dispense accurate volumes of 20 µlit/stroke, and is adj. from 5-25 µlit. Featuring quiet operation, long-lifetime, flow-tight in both directions, it offers a choice of manifold mounting, hose barbs, threaded ports. Material choices include PP/EPDM, PP/FFPM or PVDF/FFPM. Applications include diagnostic equipment, ink-jet printers, fuel cells. Install it in any position, mount it close to your desired pumping function, unlike other larger pumps that mount in remote locations. Self priming, there is no tubing maintenance, it can run dry and has a long lifetime of over 250M strokes. Perfect for transfer and metering functions in analyzers, instruments, fuel cells. Pumps built to NSF/ANSI Standard 169 are available. Contact KNF application engineers for details.

KNF's NF5DCB-4 super-compact high-performance liquid pump is now available with a 4-wire logic controlled, wide variable (10% -100%) speed brushless motor/integrated driver and a variety of wetted materials. Install it in any position, mount it close to your desired pumping function, unlike other larger pumps that mount in remote locations. Self priming, there is no tubing maintenance, it can run dry and has a long lifetime. Perfect for transfer and metering functions in analyzers, instruments, fuel cells. Pumps built to NSF/ANSI Standard 169 are available. Contact KNF application engineers for details.

KNF announces its newest addition to its OEM swing-piston pump line, the NPK04. The NPK04 is ideal for use as a transfer pump, is available in compressor or vacuum pump models and can be operated in any position. Its sealed, swing piston moves media oil-free and without adding contamination. Despite its size, it features 3.3 liters per minute of free flow, and is available in an optimized version for vacuum (max. 21.6 in. Hg) or pressure (max 31 psig) generation. Two motor options include standard DC or an economical brushless-dc motor. The BLDC model is only 2.5 in. long, is available with optional logic speed control interface and features low EMI/RFI. The pump is maintenance-free, very quiet, and exhibits low vibration, low current and power consumption, making it ideal for mobile, battery-powered applications. All standard KNF pumps can be customized to meet specific OEM performance requirements. It is suitable for use in medical and analytical instruments, ink-jet printers, and pneumatic supply functions for prosthetic devices and ergonomic furniture.

KNF announces an economical, high performance addition to its OEM swing-piston pump line, the NPK018. The NPK018 is ideal for use as a transfer pump, is available in compressor or vacuum pump models and can be operated in any position. Its sealed, swing piston moves media oil-free and without adding contamination. Despite its size, it features 18 liters per minute of free flow, and is available in an optimized version for vacuum (max. 27 in. Hg) or pressure (max 22 psig) generation. Two motor options include standard AC or DC motor. The pump is maintenance-free, very quiet, and exhibits low vibration, low current and power consumption, making it ideal for mobile, battery-powered applications. All standard KNF pumps can be customized to meet specific OEM performance requirements. It is suitable for use in medical and analytical instruments, ink-jet printers, and pneumatic supply functions for prosthetic devices and ergonomic furniture.

Miniature Air and Gas Diaphragm Pump with Threaded Ports

316SS, PPS or AL heads, EPDM and NBR elastomers

KNF's NMP miniature air and gas diaphragm pumps are now available 316 stainless or aluminum heads to provide threaded ports. Matched with EPDM or NBR elastomers, they are ideal for critical marine and aircraft applications such as on-board gas analyzer systems, where high reliability is required. Featuring up to 1.5 L/min capacity, this pump generates up to 18 in.Hg vacuum or 13 psig pressure. A choice of DC, ironless core, and long-life, low EMI/RFI brushless DC motors provide OEM design versatility. It is ideal for use in portable instruments where compact size, low current consumption and reliability are desired. Pictured in 316 stainless heads suitable for marine environments, a lightweight aluminum model is also available with threaded connections for aircraft environments. PTFE-coated diaphragms and PVDF valves are planned.

The latest technology has enabled KNF to reduce the size of the NF5 significantly below the other pumps in the product range, allowing the design engineer to mount the pump right where it is needed, in any orientation.  It pumps liquids, gases and liquid/gas mixtures at a flow rate of 50 ml/min. The NF5 weighs 32 grams, is 1.8 cm wide, has smooth, quiet pumping characteristics and features a suction height of 13 ft. water (12 in. Hg) and a discharge pressure of 15 psig.

The maintenance-free NF5 is virtually inaudible while running. It is available in two versions, differing in size, operating life and price. Liquid diaphragm pumps provide consistent, reliable operation over their lifetime, eliminating tubing fatigue or failure. Featuring a corrosion-resistant Ryton®/EPDM envelope, they can handle mild acids, caustics and other difficult materials. Self-priming, they can run dry indefinitely. Pumps built to NSF/ANSI Standard 169 are available.

The NF family features free-flow range from 50 ml to 1 L/min flow, to 16 ft. water suction or 85 psig (33 ft. water) head pressure. With its low current and power consumption, the NF is ideal for mobile, battery-powered applications, but is equally suitable for use in medical and analytical instruments, and in the cleaning, dispensing, waste-removal and ink-jet printing industries.

KNF announces the release of its latest vacuum pump, the N920. This revolutionary pump provides high flow at near-maximum vacuum, the region where traditional diaphragm pumps have the most significant reduction in performance. It achieves up to <1.3 m3/hr pumping speed and a rapid <1.5 mbar abs. ultimate end vacuum. This pump is available as a portable pump or as an OEM model with a DC or AC power connection.
As a further convenience, this pump is equipped with a manual speed control or analog motor speed input that enables the user to vary the output performance of the pump to match individual system needs, and allowing for quieter operation and an increased lifetime. Its unique three stage design incorporates inter-head connections within the pump head, enabling use of fewer moving parts, increased reliability and less expensive maintenance. The universal motor is capable of operation on 24 VDC, or AC voltages of 90 to 264 VAC at 50-60 Hz.
The N920 offers excellent long term vacuum stability with its patented diaphragm stabilization system, and high efficiency valves which can be used in roughing and backing applications, including mass spectrometers and leak detectors. A corrosion-resistant version is also available in a PPS/PTFE envelope.

KNF developed the new N838.1.2KNI diaphragm vacuum pump for medical technology applications, especially in combination with suction devices. The pump features compact dimensions and a high pneumatic capacity; it transfers 42 LPM under atmospheric conditions and achieves an ultimate vacuum of 90 mbar abs. or 27 in. Hg.
Special attention was given to reducing sound levels, and an optional silencer is also offered. For use with medical equipment, the pump can be operated in any position within an enclosure.

KNF's NF line of miniature liquid pumps are available for the first time driven by economical brushless DC motors. Portable instruments benefit from brushless DC motors which, in addition to long life, are EMI/RFI quiet, lightweight, and more compact than traditional AC motors. Liquid diaphragm pumps provide consistent, reliable operation over their lifetime, eliminating tubing fatigue or failure.

Featuring corrosion-resistant PVDF/FFPM/PTFE envelope, they can handle acids, caustics and other difficult materials. Self-priming, they will run dry indefinitely. The NF family features free-flow from 50 ml to 1 L/min flow, 16 ft. water suction or 33 ft. water head pressure. Used in medical diagnostic analyzers, process samplers, probe washers and ink-jet printers, and for portable instruments where low current consumption and reliability is desirable. Pumps built to NSF/ANSI Standard 169 are available.

The miniature NMP30 diaphragm pump proves to be one of KNF’s most versatile models. For the first time, a micropump is available with 316 stainless heads, FFPM valves, a smooth, structured FPM diaphragm, 1/4-28 threaded ports and leak tight construction to satisfy the stringent requirements of gas chromatography. Capable of 3 LPM flow rate, generating 19" Hg vacuum, it is driven by a low EMF brushless DC motor to ensure long service life. Other motors and wetted materials are available for the NMP30. The corrosion-resistant, contamination-free characteristics, and availability of threaded connections for this design make it suitable for gas chromatography sampling, stack gas sampling, gas detectors, vapor analyzers, and other sensitive, demanding sampling requirements.

KNF's newest model NMP05, NMP09 and NMP015 uses exclusive, patented construction. The bolted head and smooth, molded diaphragm are efficient and gas-tight, generating a deep 15"Hg end vacuum. Durable multi-port valves provide excellent flow specifications, and their compact length is the smallest in the industry. They are available with a low power standard DC motor,  and also Brushless DC and ironless-core motors for longest life and reduced EMI. Portable applications include medical diagnostic equipment and gas samplers. 

KNF Neuberger announces a new range of diaphragm vacuum pumps that are first to use their patented dynamic mass balancing mechanism. The dynamic mass balancing feature of the model N843 and N880 pumps instantly and automatically compensates for out-of-balance conditions caused by various pressure loads of gas forces. This results in extremely smooth running characteristics over the entire operating range. These new pumps are especially suitable for use as vacuum roughing pumps used to pump down turbo-molecular pumps. Because the compression chamber is hermetically sealed from the drive mechanism of the pump, the medium being handled remains uncontaminated. Models up to 80 liters per minute with an ultimate end vacuum capability of 1.5 Torr (29.86 "Hg) with a maximum pressure of 15 psig are available.

Where independent functions are needed, KNF will match a variety of pumps together on a common motor to save cost and size. Driven by an electronically commutated DC (BLDC) motor, this custom pump provides our customer with a vacuum and pressure source in a remarkably small package for their instrument testing assembly.

The complete pump, motor, and control require only a simple power connection to the normal 2-wire DC power for operation. The BLDC controller design includes an available "on-demand" speed control feature to enable nearly seamless integration into a larger system. The highly efficient BLDC motor provides the ability to dramatically reduce the size of the pump-motor package, lower power usage, and significantly reduce heat radiation and cost.

This N813.4ANI vacuum pump is driven by a brushless dc motor that requires only a simple connection to 2-wire DC power for its operation. The BLDC controller design includes an available "on-demand" speed control nd logic on-off feature to enable nearly seamless integration into the larger system control. In comparison to an AC motor, the highly efficient BLDC motor provides the ability to dramatically reduce the size of the pump-motor package, lower power usage, and significantly reduce heat generation.

This exciting BLDC technology is available in a range of KNF pump sizes from the compact 50 milliliter/minute through the 30 liter/minute pump models. Higher performance and chemical resistance versions are also available. These new BLDC pumps powerfully compliment the industry-leading range of world-class KNF diaphragm pumps now serving the vacuum industry worldwide. These pumps are ideal for backing turbo pumps in corrosive gas RGA, MALDI-TOF, HPLC-MS, or any time your application demands a quiet, oil-free rough vacuum pump.