Diaphragm pump MD 12 NT

Diaphragm pump MD 12 NT
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MD 12 NT

MD 12 NT

VACUUBRAND20743000ca. 359 mmca. 260 mmca. 30.6 kg

The MD 12 NT diaphragm pump is an especially powerful pump for oil-free evacuation and pumping of non aggressive gases. The three-stage design of this eight-cylinder pump provides the advantageous combination of very high pumping speed and excellent ultimate vacuum. The flow path consists of aluminium, stainless steel and carefully selected plastics to permit a wide range of applications. The fabric-reinforced double diaphragms are made of highly flexible FKM for extended operating life and high vacuum performance. Eight-cylinder NT pumps feature quiet operation, with smooth and easy-to-clean surfaces. Like all VACUUBRAND diaphragm pumps they operate absolutely oil-free and do not have any sliding components in the gas path. In normal operation they are completely free of abrasion. This eliminates most of the particulate impurities frequently generated inside of scroll or piston pumps.

Performance features

  • contamination-free pumping and evacuation
  • high flow rate even near ultimate vacuum
  • whisper quiet
  • reduced process times
  • exceptionally long diaphragm life and maintenance-free drive system for low lifetime costs

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Technical data

Unit Converter
Technical dataUnit MD 12 NT
Number of heads / stages8 / 3
Max. pumping speed at 50/60 Hzm3/h12.1 / 13.3
Max. pumping speed at 50/60 Hzcfm7.1 / 7.8
Ultimate vacuum (abs.)mbar/torr2 / 1.5
Ambient temperature range (operation)°C10 - 40
Ambient temperature range (storage)°C-10 - 60
Max. back pressure (abs.)bar1.1
Inlet connectionSmall flange KF DN 25
Outlet connectionSilencer / G1/2"
Rated motor powerkW0.44
Rated motor speed at 50/60 Hzmin-11500/1800
Degree of protectionIP 40
Dimensions (L x W x H)mm554 x 260 x 359
Weightkg30.6
Noise level at 50 Hz, typ.dBA50
ATEX conformity (only 230V)II 3/- G IIC T3 X Internal Atm. only
Items suppliedPump completely mounted, ready for use, with manual.
AccessoriesStainless steel tubing KF DN 25 (1000 mm: 20673337)
Hose nozzle DN 15 mm / G1/2" (20642472)
Small flange KF DN 16 / G1/2" (20672101)

MD 12 NT - Pumping speed graph at 50 Hz

MD 12 NT - Pumping speed graph at 50 Hz

MD 12 NT - Pump down graph at 50 Hz (100 l volume)

MD 12 NT - Pump down graph at 50 Hz
(100 l volume)

MD 12 NT - Pumping speed graph at 60 Hz

MD 12 NT - Pumping speed graph at 60 Hz

MD 12 NT - Pump down graph at 60 Hz (100 l volume)

MD 12 NT - Pump down graph at 60 Hz
(100 l volume)

MD 12 NT - Dimension sheet

MD 12 NT - Dimension sheet

-Technical data are subject to change without notice-

Ordering data

Product nameMains voltage and frequencyPlug* Order no.
MD 12 NT 230 V~ 50-60 Hz
CEE 20743000
230 V~ 50-60 Hz
CH, CN 20743001
230 V~ 50-60 Hz
UK, IN 20743002
100-115 V~ 50-60 Hz
120 V~ 60 Hz
US 20743003

* As part of the implementation process of our new ERP system in 2018 our catalog numbers were extended to 8 digits in length by adding the digits “2” or “20” to the beginning of the old catalog numbers.

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