Diaphragm pump MD 4 NT
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MD 4 NT
VACUUBRAND736000ca. 198 mmca. 239 mmca. 16.4 kgThese 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
Technical data
Unit Converter 
| Technical data | Unit | MD 4 NT |
|---|---|---|
| Number of heads / stages | 4 / 3 | |
| Max. pumping speed at 50/60 Hz | m3/h | 3.8 / 4.3 |
| Max. pumping speed at 50/60 Hz | cfm | 2.2 / 2.5 |
| Ultimate vacuum (abs.) | mbar/torr | 1 / 0.75 |
| Ambient temperature range (operation) | °C | 10 - 40 |
| Ambient temperature range (storage) | °C | -10 - 60 |
| Max. back pressure (abs.) | bar | 1.1 |
| Inlet connection | Small flange KF DN 16 | |
| Outlet connection | Silencer / G1/4" | |
| Rated motor power | kW | 0.25 |
| Rated motor speed at 50/60 Hz | min-1 | 1500/1800 |
| Degree of protection | IP 40 | |
| Dimensions (L x W x H) | mm | 325 x 239 x 198 |
| Weight | kg | 16.4 |
| Noise level at 50 Hz, typ. | dBA | 45 |
| NRTL certification | Canada and the USA | |
| ATEX conformity (only 230V) | II 3G IIC T3 X Internal Atm. only | |
| Items supplied | Pump completely mounted, ready for use, with manual. | |
| Accessories | Stainless steel tubing KF DN 16 (1000 mm: 673336) |
MD 4 NT - Pumping speed graph at 50 Hz MD 4 NT - Pump down graph at 50 Hz (10 l volume) MD 4 NT - Pumping speed graph at 60 Hz MD 4 NT - Pump down graph at 60 Hz (10 l volume) |
MD 4 NT - Dimension sheet |
-Technical data are subject to change without notice-
Ordering data
| Product name | Mains voltage and frequency | Plug | Order no. |
|---|---|---|---|
| MD 4 NT | 230 V~ 50-60 Hz | CEE | 736000 |
| 230 V~ 50-60 Hz | CH | 736001 | |
| 230 V~ 50-60 Hz | UK, IN | 736002 | |
| 100-115 V~ 50-60 Hz 120 V~ 60 Hz | US | 736003 | |
| 200-230 V~ 50-60 Hz 100-115 V~ 50-60 Hz 120 V~ 60 Hz | IEC plug EN 60320 | 736005 |
Product comparison
 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | |  |  | |||||||||||||
Diaphragm pump | - | 1.5 | - | 1.2 | 1.4 | - | - |  | - | - | - | - | - | - | - | - |
Diaphragm pump | - | 1 | - | 3.8 | 4.3 | - | - | | - | - | - | - | - | - | - | - |
VARIO® diaphragm pump | - | 1 | - | 5.7 | 5.7 | - | - | | - | - | - | - | - | | | - |
Diaphragm pump | - | 2 | - | 12.1 | 13.3 | - | - | | - | - | - | - | - | - | - | - |
VARIO® diaphragm pump | - | 1.5 | - | 13.4 | 13.4 | - | - | | - | - | - | - | - | | | - |
