VARIO®-SP diaphragm pump MD 1 VARIO-SP


VACUUBRAND20696101ca. 163 mmca. 143 mmca. 4.1 kg20696101

The three-stage MD 1 VARIO-SP diaphragm pump, with its variable speed drive system, attains significantly higher pumping speed and a better ultimate vacuum than the corresponding fixed speed pump. The brushless 24V DC motor (maintenance-free) enables easy integration of the pump into other equipment, and operation independent of line voltage. The pump is extraordinarily silent and vibration-free, with an extended lifetime for its diaphragms.

Performance features

  • contamination-free pumping and evacuation
  • high flow rate even near ultimate vacuum
  • variable speed: Fast pump down at high motor speed, with reduced speeds to maintain vacuum
  • very powerful and extremely compact; whisper quiet and ultra-low vibration, especially at low speed
  • customized versions available


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Technical data

Unit Converter
Technical dataUnit MD 1 VARIO-SP
Number of heads / stages4 / 3
Max. pumping speedm3/h1.8
Max. pumping speedcfm1.1
Ultimate vacuum (abs.)mbar/torr1 / 0.75
Ambient temperature range (operation)°C10 - 40
Ambient temperature range (storage)°C-10 - 60
Max. back pressure (abs.)bar1.1
Inlet connectionHose nozzle DN 6 mm
Outlet connectionSilencer / G1/8"
Rated motor powerkW0.064
Typ. current (<10 mbar, 1500 min-1)A1.5
Motor speed rangemin-1200 - 2400
Rated speedmin-11500/1800
Protection classIP 20
Dimensions (L x W x H)mm223 x 143 x 163
Noise level at 50 Hz, typ.dBA37
NRTL certificationCanada and the USA
ATEX conformity (only 230V)II 3/- G IIC T3 X Internal Atm. only
Items suppliedPump completely mounted, ready for use, with 2 m cable without plug and with manual
AccessoriesRubber vacuum tubing DN 6 mm (20686000)
Small flange KF DN 16 / G1/8" (20637425)

MD 1 VARIO-SP - Pumping speed graph

MD 1 VARIO-SP - Pumping speed graph

MD 1 VARIO-SP - Pump down graph (10 l volume)

MD 1 VARIO-SP - Pump down graph
(10 l volume)

MD 1 VARIO-SP - Dimension sheet

MD 1 VARIO-SP - Dimension sheet

-Technical data are subject to change without notice-

Ordering data

Product nameMains voltage and frequencyPlug* Order no.
MD 1 VARIO-SP 24 V= Open wires 20696101

* As part of the implementation process of our new ERP system in 2018 our catalog numbers were extended to 8 digits in length by adding the digits “2” or “20” to the beginning of the old catalog numbers.

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