MD 4 VARIO-SP

Description

MD 4 VARIO-SP

VARIO-SP^TM diaphragm pumps are extremely compact and ideal for continuous, oil-free pumping of non-aggressive gases at good ultimate vacuum. Due to their variable speed drive system they are much more flexible to use than the corresponding fixed speed pumps. The brushless 24V DC motor (maintenance-free) enables easy integration of the pump into other equipment and operation independent of line voltage. The pump design is distinguished by particularly silent operation and long diaphragm lifetime. The three-stage MD 4 VARIO-SP diaphragm pump offers higher flow rate and excellent ultimate vacuum.

Performance features

contamination-free pumping and evacuation
high flow rate even near ultimate vacuum
variable speed: Fast pump down at high motor speed, maintain vacuum with reduced motor speed
very powerful and extremely compact; whisper quiet and ultra-low-vibration, especially at low speed
choose the MZ 2 VARIO-SP for reliable, variable pumping, or the MD 4 VARIO-SP for greater vacuum capacity and higher flow rates

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Technical data / Ordering data

Technical data

Technical data	Unit	MD 4 VARIO-SP
Number of heads / stages		4 / 3
Max. pumping speed	m3/h	3.8
Max. pumping speed	cfm	2.2
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	0.16
Typ. current (<10 mbar, 1500 min^-1)	A	2.5
Motor speed range	min-1	400 - 2200
Degree of protection		IP 20
Dimensions (L x W x H)	mm	259 x 238 x 179
Weight	kg	12.2
Noise level at 50 Hz, typ.	dBA	50
ATEX conformity (only 230V)		II 3G IIC T3 X Internal Atm. only
Items supplied		Pump completely mounted, ready for use, with 2 m cable without plug and with manual.
Accessories		Stainless steel tubing KF DN 16 (1000 mm: 673336)

MD 4 VARIO-SP - Pumping speed graph

MD 4 VARIO-SP - Pump down graph (10 l volume)

-Technical data are subject to change without notice-

Ordering data

Product name	Mains voltage and frequency	Plug	Order no.
MD 4 VARIO-SP	24 V=	Open wires	720100

Product comparison



MD 1 VARIO-SP	-	1	-	1.8	1.8	-	-	-	-	-	-	-	-	-
MD 1C VARIO-SP	-	2	4	1.8	1.8		-	-	-	-	-	-	-	-
MZ 2 VARIO-SP	-	9	-	2.5	2.5	-	-	-	-	-	-	-	-	-
MD 4 VARIO-SP	-	1	-	3.8	3.8	-	-	-	-	-	-	-	-	-