VACUUBRAND MD 12 NT Diaphragm Pump

Features
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 aluminum, 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.

The MD 12 NT is an excellent choice for continuous, oil-free evacuation and pumping of non-aggressive gases, especially for applications in physics and analytics. Due to the very good ultimate vacuum the MD 12 NT is often used as an alternative to rotary vane pumps, for example for vacuum ovens, for very quick and efficient degassing of viscous media, exhaust gas analytics and especially as backing pump for large turbomolecular drag pumps. The particularly high pumping speed enables the usage of bigger vacuum apparatus and with high gas throughput. The pump is extraordinarily silent and exhibits very low vibration making it an excellent choice for sensitive equipment such as electron microscopes. Back diffusion of oil or even oil back flow, e.g., into a high vacuum chamber is excluded due to its oil-free operation.

VACUUBRAND MD 12 NT Diaphragm Pump Specifications

Max. pumping speed 50 Hz	12.1 m 3/h
Max. pumping speed 60 Hz	7.1 cfm
Ultimate vacuum	2 mbar / 1.5 torr
Number of heads	8
Number of stages	3
Lower ambient temperature (operation)	10 °C
Upper ambient temperature (operation)	40 °C
Lower ambient temperature (storage)	-10 °C
Upper ambient temperature (storage)	60 °C
Max. back pressure (abs.)	1.1 bar
Inlet connection	small flange KF DN 25
Outlet connection	G1/2"
Rated motor power	0.53 kW
Rated motor speed at 50/60 Hz	1650 min -1
Protection class IEC 60529	IP 40
Dimension L in mm	554 mm
Dimension B in mm	260 mm
Dimension H in mm	359 mm
Weight	30.3 kg
Noise (sound pressure level) in dBA at 50 Hz or 1500 rpm/62% (VARIO)/1500 rpm (VARIO-SP)/12500 Upm (VACUU·PURE®)	50 dBA
NRTL certification	No
Items supplied	Pump completely mounted, ready for use, silencer, with manual.
Rated mains voltage range 1	100-120 V
Mains frequency 1	50-60 Hz

Comparison of Models

Specs	MD 1 Diaphragm Pump	MD 1C Chemistry Diaphragm Pump	MD 4 NT Diaphragm Pump	MD 4 VARIO Select Diaphragm Pump	MD 4C NT Chemistry Diaphragm Pump	MD 4C VARIO Select Chemistry Diaphragm Pump	MD 12 NT Diaphragm Pump
Max. Pumping Speed 50 Hz	1.2 m³/h	1.3 m³/h	3.8 m³/h	5.7 m³/h	3.4 m³/h	4.6 m³/h	12.1 m³/h
Ultimate Vacuum	1.5 mbar / 1.1 torr	2 mbar / 1.5 torr	1 mbar / 0.75 torr	1 mbar / 0.75 torr	1.5 mbar / 1.1 torr	1.5 mbar / 1.1 torr	2 mbar / 1.5 torr
Number of Heads	4	4	4	4	4	4	8
Vacuum Controller	N/A	N/A	N/A	VACUU·SELECT	N/A	VACUU·SELECT	N/A
Rated Motor Power	0.08 kW	0.08 kW	0.25 kW	0.53 kW	0.25 kW	0.53 kW	0.53 kW
Weight	7.3 kg	7.9 kg	16.4 kg	19.1 kg	14.3 kg	16.8 kg	30.3 kg
Noise Level	40 dBA	41 dBA	45 dBA	45 dBA	45 dBA	43 dBA	50 dBA
NRTL Certification	Yes	Yes	Yes	No	Yes	No	No
Mains Voltage Range	220-230 V / 100-115 V / 120 V	220-230 V / 100-115 V / 120 V	100-115 V / 120 V	100-120 V	100-115 V / 120 V	100-120 V	100-120 V

Downloads