Flow rate (at atm. pressure)

Up to




Down to


mbar abs.


Pump, two separator flasks & base plate

Streamlined with Higher Performance

KNF LABOPORT SR 840 G comprises an N 840 G diaphragm vacuum pump, a base plate, and two separator flasks on the suction and pressure side.

Offering higher performance than its sibling SR 820 G, it delivers a flow rate of up to 34 l/min, an ultimate vacuum of down to 6 mbar abs., and a pressure of up to 0.1 bar g. 

With a user-centered design approach, the newly-revised LABOPORT series not only features a modern, elegant look but also provides all the essential functionality that customers need.

  • High level of vapor and condensate compatibility
  • Excellent chemical resistance
  • Integrated rotational speed control
  • Integrated gas ballast valve
  • The system can start against the ultimate vacuum of the pump
  • Environmentally friendly
  • Compact, quiet, and reliable
  • 100% oil-free transfer
  • Three-color status display for in-operation, standby, and error
  • Modularly expandable
Areas of Use
  • Filtration
  • Degassing
  • Vacuum oven
  • Fluid aspiration
  • Centrifugal concentration

KNF VC 900 vacuum controller works with the LABOPORT SR 840 G, providing more precise control with an easy-to-use touch interface. Please contact us to learn more.

  • Flow rate l/min at atm. pressure34
    Ultimate vacuum mbar abs.6
    Permissible media temperature °C+5° to +40°C
    Permissible ambient temperature °C+5° to +40°C
    Voltage V100 – 240 V
    Frequencies Hz50/60 Hz
    Power P1 W100 W
    Weight kg13.1 kg
    Dimensions W×H×D (mm)299×250×274
    Operating pressure bar0.1
    Operating current 0.6 A (240 VAC); 1.0 A (100 VAC)
    Protection class IP 30
    Inlet hose connections For hose ID 8 ‒ 9.5
    Outlet hose connections For hose ID 10
    • Pump head: TFM™ PTFE
    • Diaphragm: PTFE-coated
    • Valves: FFPM

Related Products

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Laboratory Vacuum Pump Systems


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