Description
This used VWR / KNF PM20405-86 is a compact diaphragm vacuum pump. It delivers clean, oil-free vacuum for laboratory use. With a flow rate of around 6 L/min, it supports many routine applications. The ultimate vacuum is about 100 mbar absolute. That makes it suitable for tasks such as filtration, degassing, or gas sampling.
The design is simple and robust. No oil means no contamination of your samples. It also means less maintenance and no risk of backstreaming. The motor is maintenance-free and built for long service life. The housing is resistant and easy to clean.
This model is lightweight, only 1.9 kg. Its small footprint saves valuable bench space. Operation is quiet, so it can run in teaching labs or shared spaces. The pump is reliable, efficient, and ready for daily use.
Key specifications
- Flow rate: ~6 L/min
- Ultimate vacuum: ~100 mbar abs.
- Max overpressure: ~2.4 bar
- Motor power: ~60 W
- Supply: 230 V / 50 Hz, ~0.65 A
- Dimensions: 90 × 164 × 141 mm
- Weight: ~1.9 kg
- Protection class: IP20
Applications
- Vacuum filtration
- Degassing solvents or buffers
- Gas transfer or sampling
- Supporting analytical instruments
- Desiccators and small vacuum tasks
