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Pump KNF N840 FTP
Pump KNF N840 FTP

The N series chemically resistant diaphragm pumps 840 and N 840.3 are single-head and double-ended devices head and dry running used in a wide variety of applications for laboratories. They transfer and empty without contamination. The heart of these pumps so Compact is a KNF structured diaphragm. This diaphragm patented was highly optimized using the Finite element method. As a result, we could get smaller pumps, but at the same time, with a longer life diaphragm.


  • 100% oil-free transfer
  • Pure transfer, evacuation and compression
  • Highly compatible with vapors and condensation
  • Chemically resistant
  • Therefore suitable for vapors and gases highly
  • aggressive or corrosive
  • Does not need maintenance
  • It does not harm the environment.
  • Approximate index of gas tightness and leaks
  • 6 x 10-3 mbar x l / s, not tested in series production

Información técnica

N 840 FTP

Discharge  (l/min)1)


Final vacuum (mbar abs.)                         


Operating pressure (bar g)                      


Tube connectors (mm)                

ID 10

Room temperature and tolerable gas

+5...+40 °C

Voltage / Frequency



Supply network

IP 44

Power P1

180 W

Operating current

1,5 A


10.3 kg

Dimensions wxdxh (mm)