Flow rate (at atm. pressure)

Up to




Down to


mbar abs.


Up to


bar g

KNF N 680.1.2 Ex
Robust and Reliable

The N 680.1.2 Ex is a new addition to the ATEX-compliant protection pumping solutions provided by KNF. Boasting a flow rate of up to 220 l/min, and an ultimate vacuum of down to 150 mbar abs., this pump can transfer explosive gases and vapors with a spectacularly high level of gas tightness — up to 6 × 10-3 mbar × l/s as a standard.

The IP 55, flame-proof motor comes with a terminal box, ensuring enhanced safety and easier installation.

Possible Areas of Use

The N 680.1.2 Ex is well-suited for applications requiring flammable gas recovery or particularly low gas leakage. For instance, petrochemistry industry, energy technology, process industry, chemical industry, environmental monitoring, maritime engine/emission monitoring, etc.

  • Flow rate l/min at atm. pressure220
    Ultimate vacuum mbar abs.150
    Operating pressure bar g3
    Permissible media temperature °C+5° to +40°C
    Permissible ambient temperature °C+5° to +40°C
    Voltage V230/400 V
    Frequencies Hz50 Hz
    Protection class - motor IP 55
    Protection class - pump IP 20
    Explosion protection - three-phase motor Ex II 2G Ex db eb IIC T4 Gb
    Explosion protection - motor [ST.9 E Ex] Ex II 2/2G Ex h IIB T3 Gb / [SP.9 E Ex] Ex II 2/2G Ex h IIB+H2 T3 Gb
    • Pump head: stainless steel
    • Diaphragm: PTFE/EPDM
    • Valves: stainless steel

Related Products

More products available on the category page:

ATEX-Compliant Diaphragm Gas Pumps

Contact Us

Contact Details

Contact Us Top