Quality Instrument and Equipment Solutions for Demanding Technical Environments
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KNF Air & Gas OEM Pumps
Micro <1 to 4 LPM
Mini High Capacity Pumps
Swing Piston Pumps
Heated Head Sampling Pumps
Double Diaphragm Pumps
Explosion Proof
KNF's experience with established designs, materials and motors permits us to "optimize" standard pumps to fit your exact specifications. For example, you may require an electropolish wetted surface for a sensitive analyzer project, or a micropump fitted with a low-current motor for your portable instrument.
Available Options Brushless DC Motors Finishes and Coatings Pumps with
Brushless DC Motors
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Shock and Vibration Isolators Effective Soundproofing Custom Mounting Plates Leak Tight Performance Custom Connectors Insulated, Heated-Heads Restart Against Pressure Low Temperature Materials Double-Diaphragm Pumps Restart Against Vacuum
Available Materials Aluminum Ceramic Ethylene Propylene Hastelloy® Polypropylene Kalrez® Kynar® Neoprene Nickel-plated Polycarbonate Buna-N Ryton® Ryton® Teflon® Carpenter 20®
Why KNF Pumps are Better
KNF pioneered in the design of advanced diaphragms. The first diaphragms were simple circular, flat sheets of an elastomer with a hole punched in the center. The diaphragm was clamped around the edges between the pump head and the compressor housing, and fastened to the oscillating connecting rod in the center with a metal clamping disk. Pumping action occurred as the diaphragm moved within the pump chamber. Clearance is machined into the pump head to accommodate the bulky clamping disk. This increases unproductive dead volume, reducing achievable end vacuum.KNF Designs the Molded Diaphragm KNF engineers molded a threaded metal stud into the diaphragm body, which eliminated the bulky clamping disk (left) . Gone was an occasional source of leaks and corrosion. The new diaphragm (right), smooth across and pliable, now fits closer to the pump head. This drastically reduces dead volume, and as a result, improves maximum vacuum. Optional PTFE coating is available for the ultimate in corrosion-protection.
A New Patented, Structured Diaphragm Another breakthrough in diaphragm technology occurred when KNF engineers used FEA methods to design a molded, ribbed structure into the underside of the diaphragm. Now, for the first time, flexibility characteristics of the diaphragm are under the control of the pump designer. As a result, diaphragm life and efficiency increased, resulting in a significant reduction in pump size.
Patented, Multi-Port Valve System
This valve design is an exciting breakthrough, and is an exclusive, patented product of KNF's worldwide R&D center in Munzingen, Germany.
The tough, circular valve disk spans several smaller holes (left) instead of one large hole. It now can easily withstand the punishment created by pumping liquid droplets. Older, less efficient flapper-type valves are easily damaged by liquids; necessitating inconvenient delays and equipment downtime.
Dynamic Mass Balancing
KNF Neuberger announces a new range of diaphragm vacuum pumps that are the first to use our 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 pum's entire operating range.
