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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 models from 50 ml to 3 L/min flow, 16 ft. water suction or 33 ft. water head pressure. They are available in single and two-head designs for special applications. These precision-made pumps are 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.

KNF is the only diaphragm pump manufacturer that is listed with NSF. All of our products marked with .51 model number are now certified by NSF according to the standard NSF/ANSI 169.

They are maintenance-free and the perfect replacement for messy, heavy peristaltic pumps, and use no tubing.