VACUUBRAND MV 2 VARIO Select Diaphragm Pump

Features
Four-stage diaphragm pumps - like the MV 2 VARIO select - are an excellent solution for continuous, oil-free pumping of non-corrosive gases at fractional millibar vacuum levels. Wetted parts are made of aluminum, stainless steel and carefully selected plastics suitable for a wide range of non-corrosive applications. The MV 2 VARIO select continuously adapts its motor speed to hold the desired vacuum level. That means the pump is whisper-quiet and generates ultra-low vibrations, and has high leak tightness. The highly flexible fabric-reinforced double FKM diaphragm is ideal for extended operating life. The VARIO design includes the variable speed pump and the VACUU-SELECT vacuum controller with an external gauge head. The demand-responsive motor speed control on VARIO models further extends the already long lifetimes of diaphragms and valves.

Four-stage diaphragm pumps are an excellent choice for continuous, contamination-free evacuation and pumping of non-aggressive gases under the very high vacuum demands of applications in physics and analytics. They generate a clean vacuum as they are designed without any sliding seals. Hence abrasion or dust are excluded that might creep back into the application. Due to the outstanding ultimate vacuum these pumps are often used as an alternative to rotary vane pumps. A typical application is the use as backing pump for turbomolecular drag pumps. Additionally, the VARIO version provides vacuum control by precise adjustment of the diaphragm pump's motor speed. Depending on the application the demand-responsive motor speed control results in unsurpassed lifetimes of service parts like diaphragms as well as optimal performance for backing of turbo pumps.

VACUUBRAND MV 2 VARIO Select Diaphragm Pump Specifications

Max. pumping speed 50 Hz	3.3 m 3/h
Max. pumping speed 60 Hz	1.9 cfm
Ultimate vacuum	0.3 mbar / 0.2 torr
Number of heads	4
Number of stages	4
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 16
Outlet connection	Silencer / G1/4"
Rated motor power	0.53 kW
Protection class IEC 60529	IP 20
Dimension L in mm	325 mm
Dimension B in mm	235 mm
Dimension H in mm	245 mm
Weight	19.1 kg
Noise (sound pressure level) in dBA at 50 Hz or 1500 rpm/62% (VARIO)/1500 rpm (VARIO-SP)/12500 Upm (VACUU·PURE®)	45 dBA
NRTL certification	No
Items supplied	Pump completely mounted, ready for use, with manual.
Rated mains voltage range 1	100-120 V
Mains frequency 1	50-60 Hz
Interface	Ethernet (RJ45): Modbus TCP / USB (Type A): Data transfer, software update, RS-232 (additional adapter required)

Comparison of Models

Specification	MV 2 NT	MV 2 VARIO Select	MV 10 NT	MV 10C NT Chemistry
Max. Pumping Speed 50 Hz	2.2 m³/h	3.3 m³/h	10.4 m³/h	9.5 m³/h
Ultimate Vacuum	0.5 mbar / 0.4 torr	0.3 mbar / 0.2 torr	0.5 mbar / 0.38 torr	0.9 mbar / 0.68 torr
Number of Heads	4	4	8	8
Number of Stages	4	4	4	4
Rated Motor Power	0.25 kW	0.53 kW	0.53 kW	0.53 kW
Weight	16.4 kg	19.1 kg	30.3 kg	27.4 kg
Noise Level	50 dBA	45 dBA	50 dBA	50 dBA
NRTL Certification	Yes	No	No	No
Mains Voltage Range	100-115 V / 120 V	100-120 V	100-120 V	100-120 V

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