N 630 Ex Double Diaphragm Series

Flow rate (at atm. pressure)

Up to




Down to


mbar abs.


Up to


bar g

KNF N 630 Ex
Two-Fold Safety with ATEX Compliance

Double diaphragm models in KNF N 630 Ex combine the safety enhancements offered by the specialized two-fold membrane structure with ATEX-compliant explosion protection.

These models can work reliably with dangerous, noble, or rare gases in a potentially explosive atmosphere.

N 630__.12 E ExOne-headed vacuum pumps and
Datasheet Manual 3D CAD
N 630.3__.12 E ExTwo-headed vacuum pumps,
Datasheet Manual 3D CAD
N 630.1.2__.12 E ExTwo-headed vacuum pumps,
Datasheet Manual 3D CAD

An optional, external sensor is available to monitor the status of the working diaphragm, reducing possible workspace risks for customers.

Robust, Durable, and Quiet

In addition to the excellent chemical resistance and exceptional gas tightness (5 × 10-5 mbar × l/s as a standard), these ex-proof models also feature the same affixed base rails with shock mounts as their N 630 siblings — well minimize noise and vibration.

Certified with Directive 2006/42/EC

A terminal box in the flameproof motor is available for easier installation and safer operation. All N 630 Ex models fulfill the criteria for completed machinery according to directive 2006/42/EC, therefore come with the CE mark.

KNF Modular System permits timely custom-tailored solutions. Please contact us to learn more. 

  • Flow rate l/min at atm. pressure68
    Ultimate vacuum mbar abs.120
    Operating pressure bar g4
    Permissible media temperature °C+5° to +40°C
    Permissible ambient temperature °C+5° to +40°C
    Explosion protection - three-phase motor Ex II 2G Ex de IIC T4 Gb
    Explosion protection - pump parts Ex II 2G Ex h IIB+H2 T3 Gb
    • Pump head: stainless steel
    • Diaphragm: PTFE-coated
    • Valves: stainless steel

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