KNF N840.3FT.40.18 Diaphragm Vacuum Pump
Maximum Flow Rate
34 l/min
Ultimate Vacuum
10 mbar (abs.)
Hose Connections
ID 10
- 100% oil-free transfer for pure gas transferring and evacuation
- Integrated KNF self-drying system removes condensate without altering vacuum levels
- Chemically resistant PTFE and FFPM construction for handling aggressive gases and vapors
- Maintenance-free design ensures long-term, hassle-free operation
- Environmentally friendly with clean, oil-free performance
- Quiet, compact, and reliable for versatile lab applications

Operating quietly and efficiently, the KNF N840.3FT.40.18 offers maintenance-free, environmentally friendly operation, making it an ideal solution for laboratories requiring clean, oil-free gas transfer. Compact yet powerful, it functions within ambient temperatures of +5°C to 40°C, with IP44 protection and a lightweight design of 28.4 lb. This reliable diaphragm pump provides consistent performance while minimizing contamination risks, ensuring precise, efficient results in even the most challenging environments.
All of our equipment is in excellent condition and will be fully tested to perform at factory specifications before being shipped.
The KNF N840.3FT.40.18 Diaphragm Vacuum Pump includes:
- > Power Cord
- > Operator's Manual
- > Full 180 Day Parts and Labor Warranty
KNF N840.3FT.40.18 Diaphragm Vacuum Pump Specifications
| Flow Rate | 34 l/min |
| Ultimate Vacuum | 10 mbar (abs.) |
| Operating Pressure | 1 bar (rel.) |
| Pump Head Material | PTFE |
| Diaphragm Material | PTFE coated |
| Valve Material | FFPM |
| Hose Connections | ID 10 |
| Protection Class | IP 44 |
| Permissible Ambient Temperature | +5°C to 40°C |
| Dimensions (W x D x H) | 7.5 x 13.4 x 9.4 in. (18.9 x 34.1 x 23.9 cm) |
| Weight | 28.4 lb. (12.9 kg) |
| Electrical Requirements | 115VAC, 60Hz, 3.2A, 250W |


Click Here to View the Technical Specs for the KNF N840.3FT.40.18 Diaphragm Vacuum Pump