N 820.3 FT.40.18 Vacuum Pump

The chemically-resistant series ND 820.3 FT.40.18 diaphragm pump is a twin-head unit with an integrated KNF self-drying system. There is a wide range of applications for this pump in laboratories, especially whenever clean vacuum is required and moist gases must be pumped down. Examples include vacuum-drying of vacuum drying chambers (for drying or heat-treating substances and components) or steam sterilizers for sterilizing instruments, vessels, filters and textiles. Due to its high resistance to aggressive media, this pump can be used universally. 

The heart of these very compact pumps are KNF structured diaphragms (PTFE-coated). These patented diaphragms were stress-optimized using the Finite Elements method. As a result, we were able to make the pumps smaller while increasing the service life of the diaphragm.

The KNF self-drying system allows condensed liquid to be blown out of the pump heads at high speed during evacuation. The vacuum in the recipient remains constant. 

The drying cycle can be adjusted to the requirements of the individual process using three variables. After drying, the pump reaches a better vacuum and is able to evacuate significantly faster compared with pumps without a drying system.

Technical features:

  • Pure transfer and evacuation
  • Highly compatible with vapors and condensation
  • Chemically-resistant
  • Therefore suitable for highly aggressive or corrosive gases and vapours
  • Maintenance-free
  • Environmentally friendly
  • Gastight, leakage rate approx. 6 x 10-3 mbar x l/s, not tested in serial production.

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N 820.3 FT.40.18 Vacuum Pump