MD 4 NT

Description

MD 4 NT

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 / Ordering data

Technical data

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, CN	736001
	230 V~ 50-60 Hz	UK	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



MD 1	-	1.5	-	1.2	1.4	-	-	-	-	-	-	-	-	-	-
MD 4 NT	-	1	-	3.8	4.3	-	-	-	-	-	-	-	-	-	-
MD 4 NT VARIO	-	1	-	5.7	5.7	-	-	-	-	-	-	-			-
MD 12	-	2	-	9.6	10.4	-	-	-	-	-	-	-	-	-	-
MD 12 NT	-	2	-	12.1	13.3	-	-	-	-	-	-	-	-	-	-