Diaphragm pump MD 4 NT

Diaphragm pump MD 4 NT
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MD 4 NT

MD 4 NT

VACUUBRAND20736000ca. 198 mmca. 239 mmca. 16.4 kg

These three-stage diaphragm pumps are an excellent solution for continuous, oil-free pumping of non-corrosive gases. They reach an excellent ultimate vacuum of 1 mbar. All parts in contact with pumped gases and vapors are made of aluminum, stainless steel and carefully selected plastics suitable for a wide range of applications with non-corrosive gases. The new NT-series provides whisper quiet and ultra-low vibration operation, high leak tightness and improved performance. The highly flexible fabric-reinforced double diaphragm made of FKM is ideal for extended operating life.

Performance features

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

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Technical data

Unit Converter
Technical dataUnit MD 4 NT
Number of heads / stages4 / 3
Max. pumping speed at 50/60 Hzm3/h3.8 / 4.3
Max. pumping speed at 50/60 Hzcfm2.2 / 2.5
Ultimate vacuum (abs.)mbar/torr1 / 0.75
Ambient temperature range (operation)°C10 - 40
Ambient temperature range (storage)°C-10 - 60
Max. back pressure (abs.)bar1.1
Inlet connectionSmall flange KF DN 16
Outlet connectionSilencer / G1/4"
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 239 x 198
Weightkg16.4
Noise level at 50 Hz, typ.dBA45
NRTL certificationCanada and the USA
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 16 (1000 mm: 20673336)

MD 4 NT - Pumping speed graph at 50 Hz

MD 4 NT - Pumping speed graph at 50 Hz

MD 4 NT - Pump down graph at 50 Hz (10 l volume)

MD 4 NT - Pump down graph at 50 Hz
(10 l volume)

MD 4 NT - Pumping speed graph at 60 Hz

MD 4 NT - Pumping speed graph at 60 Hz

MD 4 NT - Pump down graph at 60 Hz (10 l volume)

MD 4 NT - Pump down graph at 60 Hz
(10 l volume)

MD 4 NT - Dimension sheet

MD 4 NT - Dimension sheet

-Technical data are subject to change without notice-

Ordering data

Product nameMains voltage and frequencyPlug* Order no.
MD 4 NT 230 V~ 50-60 Hz
CEE 20736000
230 V~ 50-60 Hz
CH 20736001
230 V~ 50-60 Hz
UK, IN 20736002
100-115 V~ 50-60 Hz
120 V~ 60 Hz
US 20736003
200-230 V~ 50-60 Hz
100-115 V~ 50-60 Hz
120 V~ 60 Hz
IEC plug EN 60320 20736005
230 V~ 50-60 Hz
CN 20736006

* 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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