diaphragm vacuum pump / oil-free / three-stage / chemical-resistant

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diaphragm vacuum pump / oil-free / three-stage / chemical-resistant diaphragm vacuum pump / oil-free / three-stage / chemical-resistant - MD 4C NT


  • Technology:


  • Lubrication:


  • Number of stages:


  • Other characteristics:


  • Applications:

    for laboratories, for the chemical industry, for medical applications, for pharmaceutical applications, chemical process, for the plastics industry, for gas

  • Flow rate:

    3.4 m³/h (120.07 ft³/h)

  • Ultimate vacuum:

    1.5 mbar, 3 mbar (0.02 psi)


Three-stage chemistry-design diaphragm pumps are an excellent solution for continuous, oil-free pumping of corrosive gases and vapors and meet even challenging requirements. The three-stage design provides the advantageous combination of high pumping speed and very low ultimate vacuum. All parts of the MD 4C NT in contact with pumped media are made of chemically resistant fluoroplastics. Well-proven PTFE sandwich diaphragms provide increased reliability and extended operating life. Due to the gas ballast valve and its very good ultimate vacuum (even with gas ballast) the MD 4C NT is also suitable for pumping condensable vapors of high-boiling solvents. The NT-series features further improved performance data, easy service and superior vapor tolerance.

Performance features
outstanding chemical resistance and superior vapor tolerance
exceptionally high performance even at low vacuum
excellent ultimate vacuum even with gas ballast
whisper quiet and very low vibration
long diaphragm life, maintenance-free drive system

Technical data

Number of heads / stages4 / 3
Max. pumping speed at 50/60 Hzm3/h3.4 / 3.8
Max. pumping speed at 50/60 Hzcfm2.0 / 2.2
Ultimate vacuum (abs.)mbar/torr1.5 / 1.1
Ultim. vac. (abs.) with gas ballastmbar/torr3 / 2.2
Ambient temperature range (operation)°C10 - 40
Ambient temperature range (storage)°C-10 - 60
Max. back pressure (abs.)bar1.1
Inlet connectionHose nozzle DN 8-10 mm
Outlet connectionHose nozzle DN 8-10 mm
Rated motor powerkW0.25
Rated motor speed at 50/60 Hzmin-11500/1800
Degree of protectionIP 40
Dimensions (L x W x H)mm325 x 243 x 198
Noise level at 50 Hz, typ.dBA45

Other VACUUBRAND GMBH + CO KG products

Chemistry diaphragm pumps - Down to 1.5 mbar