KNF – Diaphragm Vacuum Pump
The Diaphragm Vacuum Pump is a chemically resistant, oil-free diaphragm vacuum pump used for a wide range of laboratory applications.
Chemically resistant, oil-free diaphragm vacuum pump used for a wide range of laboratory applications. Especially suited for handling aggressive vapors, it features PTFE heads, PTFE-coated diaphragms and FFPM valves.
Key Features
- Integrated rotational speed control
- Start against ultimate vacuum of the pump
Technical Specifications
| Models | LABOPORT® N 820.3 FT.18 | LABOPORT® N 820 G | N 920 G | LABOPORT® N 842.3 FT.18 | LABOPORT® N 840 G | LABOPORT® N 840.3 FT.18 |
| Weight [kg] | 9.3 | 8.8 | 8.5 | 13.4 | 11.3 | 12.6 |
| Dimensions W x H x D [mm] | 154 x 207 x 312 | 163 x 220 x 259 | 158 x 226 x 324 | 167 x 228 x 341 | 177 x 240 x 289 | 166 x 226 x 341 |
| Flow Rate (max.) | 20 | 20 | 21 | 34 | 34 | 34 |
| Ultimate vacuum [mbar abs.] | 8 | 6 | 2 | 2 | 6 | 8 |
| Operating pressure [bar] | 1 | 0.1 | 0.5 | 1 | 0.1 | 1 |
| Voltage [V] | 230 | 100 ‒ 240 | – | 230 | 100 ‒ 240 | 230 |
| Frequencies [Hz] | 50 | 50/60 | 50-60 | 50 | 50/60 | 50 |
| Motor protection | IP44 | IP30 | IP20 | IP44 | IP30 | IP44 |
| Power P1 [W] | 120 | 60 | 135 | 245 | 100 | 245 |
| Operating current [A] | 0.7 | 0.35 (240 V AC) 0.66 (100 V AC) | 1.4 | 1.5 | 0.6 (100 V AC) 1.0 (240 V AC) | 1.5 |
Available Models
LABOPORT® N 820.3 FT.18 is a chemically resistant, oil-free diaphragm vacuum pump used for a wide range of laboratory applications. Especially suited for handling aggressive vapors, it features PTFE heads, PTFE-coated diaphragms and FFPM valves.
Key Features
- Available with an integrated gas ballast valve: N 820.3 FT.18 G
- High level of vapor and condensate compatibility
- TFM™ PTFE pump head combined with PTFE-coated diaphragm are ideal for extremely aggressive/corrosive gases and vapors
- ATEX compliant according to ATEX II 2/-G IIB+H2 T3 Gb internal atmosphere only
- High level of gas tightness
LABOPORT® N 820 G is a chemically resistant, compact and oil-free diaphragm vacuum pump with manual speed control for adjusting the pump capacity to your specific application. It features a gas ballast, PTFE/TFM heads, PTFE-coated diaphragms and FFPM valves. Suitable for a wide range of Laboratory applications including extremely aggressive/corrosive gasses and vapors.
Key Features
- High level of vapor and condensate compatibility
- Ideal for extremely aggressive/corrosive gases and vapors
- ATEX compliant according to II 2/-G IIB+H2 T3 internal atmosphere only
- Integrated gas ballast valve
- Expandable: Separators and/or condensers can be purchased individually at any time and easily fitted, enabling users to build their own customized vacuum system
- 3-color status display for in operation / stand-by / error
- Integrated rotational speed control
- Start against ultimate vacuum of the pump
N 920 G is a chemically resistant, oil-free diaphragm pump with integrated speed control for adjusting the pump speed to your specific process requirements. It features a gas ballast, PPS heads, PTFE-coated diaphragms and FFPM valves.
Key Features
- 100 % oil-free transfer – thereby pure transferring and evacuation of gases
- High suction speed, particularly in the low vacuum range
- Integrated gas ballast valve – Integrated rotational speed control enables pumping capacity to be easily adapted manually to process requirements
- Ideal for aggressive/corrosive gases and vapors
- Maintenance-free
LABOPORT® N 842.3 FT.18 is a chemically resistant, oil-free diaphragm vacuum pump used for a wide range of laboratory applications. Especially suited for handling aggressive vapors, it features PTFE heads, PTFE-coated diaphragms and FFPM valves.
Key Features
- High level of vapor and condensate compatibility
- PTFE pump head combined with PTFE-coated diaphragm are ideal for extremely aggressive/ corrosive gases and vapors
- Maintenance-free
- Chemically-resistant
- Gastight, leakage rate approx. 6 x 10-3 mbar x l/s, not tested in serial production
LABOPORT® N 840 G is a chemically resistant, compact and oil-free diaphragm vacuum pump with manual speed control for adjusting the pump capacity to your specific application. It features a gas ballast, PTFE/TFM heads, PTFE-coated diaphragms and FFPM valves. Suitable for a wide range of Laboratory applications including extremely aggressive/corrosive gasses and vapors.
Key Features
- High level of vapor and condensate compatibility
- Ideal for extremely aggressive/corrosive gases and vapors
- ATEX compliant according to II 2/-G IIB+H2 T3 internal atmosphere only
- Integrated gas ballast valve
- Expandable: Separators and/or condensers can be purchased individually at any time and easily fitted, enabling users to build their own customized vacuum system
- 3-color status display for in operation / stand-by / error
- Integrated rotational speed control
- Start against ultimate vacuum of the pump
LABOPORT® N 840.3 FT.18 is a chemically resistant, oil-free diaphragm vacuum pump used for a wide range of laboratory applications. Especially suited for handling aggressive vapors, it features a PTFE head, PTFE-coated diaphragm and FFPM valves.
Key Features
- High level of vapor and condensate compatibility
- TFM™ PTFE pump head combined with PTFE-coated diaphragm are ideal for extremely aggressive/corrosive gases and vapors
- ATEX compliant according to ATEX II 2/-G IIB+H2 T3 Gb internal atmosphere only
- High level of gas tightness
- Available with an integrated gas ballast valve: N 840.3 FT.18 G
KNF | Service Video | How to maintenance the KNF LABOPORT® N 820 G / N 840 G | Servicing
This video is an instruction how to maintenance the KNF LABOPORT N 820 G / N 840 G diaphragm vacuum pump in a few steps. When servicing the pump please observe the warning and safety instructions in the operating instructions.
KNF was founded in 1946 in Freiburg, Germany as a family-owned business and has 24 locations worldwide to this day….
