A range of portable, oil-free, diaphragm pumps from KNF which are quiet running and require the minimum of maintenance. Maximum permissible gas and air temperature is 40°C.
For heavier-duty tasks such as rotary evaporation, distillation, use with vacuum ovens and for pumping high-moisture laden gases:
- PTFE pumphead and FFPM valve bodies
- PTFE-coated diaphragm
- All other parts in contact with gas are corrosion resistant PTFE/PVDF and similar materials
- ATEX compliant to (Ex) II 2/-G IIB+H2 T3 internal atmosphere only
- All models supplied with on/off switch and hose connections
Performance data:
| Model | N840G | |
| Maximum flow rate (at atmospheric pressure) | litres per hour | 2040 |
| Ultimate vacuum | mbar | 6 |
| Maximum pressure | bar | - |
| Inlet and outlet nozzle diameter | mm | 9.5 |
| Motor protection | class | IP30 |
| Overall height width depth | mm mm mm | 240 177 289 |
| Weight | kg | 11.3 |
For 230V 50Hz single phase supplies.