A Versatile Micro Diaphragm Pump

NMP 850 HP Pump Series

The NMP 850 HP is a versatile pump for instrumental analysis

The NMP 850 HP micro gas pump is available with one or two heads. It is reliable and maintenance-free, with a 200 mbar absolute ultimate vacuum and an operating pressure of 2.5 bar relative.

With a flow rate of up to 16 l/min, the micro diaphragm pump can be used for a multitude of instrumental analysis applications, for example the disposal of sample residues. The analysis of biological samples generates mixtures of liquid chemical waste, which is why a robust and reliable pump is needed. KNF’s development team met this need by coming up with a pump head made of resistant PPS, seals made of highly chemically resistant FFKM, FKM or EPDM, and an FKM, PTFE respectively EPDM diaphragm.


The single-headed version of the NMP 850 HP processes samples and transfers them to be analyzed, either as a liquid in gas-over-liquid form or as a gas.


The double-headed version of the micro diaphragm pump can be used for degassing liquid samples. Dissolved gases in the samples may affect analytical accuracy, reproducibility and performance. When integrated into analytical systems, the specific vacuum can be adjusted via speed-controlled motors, ensuring accurate results.


Both the single-headed and the double-headed variant of the compact, high-performance NMP 850 HP can be fitted in any position. This opens up a multitude of possible analytical applications for the users of this micro diaphragm gas pump.